Sony (SONY) 20-F 22 Jun 21 2021 FY Annual report (foreign) Financial data

Cover Page

Cover Page	12 Months Ended
	Mar. 31, 2021shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Registrant Name	SONY GROUP CORPORATION
Entity Central Index Key	0000313838
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Transition Report	false
Document Annual Report	true
Document Shell Company Report	false
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Document Registration Statement	false
Entity File Number	1-6439
Entity Incorporation, State or Country Code	M0
Entity Address, Address Line One	7-1, KONAN 1-CHOME
Entity Address, City or Town	MINATO-KU
Entity Address, Postal Zip Code	108-0075
Entity Address, Country	JP
Document Accounting Standard	U.S. GAAP
ICFR Auditor Attestation Flag	true
Business Contact [Member]
Document Information [Line Items]
Contact Personnel Name	J. Justin Hill, Senior Vice President, Finance & Investor Relations
Entity Address, Address Line One	25 Madison Avenue, 26th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10010-8601
Local Phone Number	833-6722
City Area Code	212
American depositary shares
Document Information [Line Items]
Trading Symbol	SONY
Entity Common Stock, Shares Outstanding	118,979,394
Security Exchange Name	NYSE
Title of 12(b) Security	American Depositary Shares
Common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	1,239,227,575
Security Exchange Name	NONE
Title of 12(b) Security	Common Stock
No Trading Symbol Flag	true

Consolidated Balance Sheets

Consolidated Balance Sheets - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Current assets:
Cash and cash equivalents	¥ 1,786,982	¥ 1,512,357
Marketable securities (including assets pledged that secured parties are permitted to sell or repledge of 17,521 million yen and 48,899 million yen in 2020 and 2021)	2,902,438	1,847,772
Notes and accounts receivable, trade and contract assets	1,099,300	1,028,793
Allowance for credit losses	(29,406)	(25,873)
Inventories	637,391	589,969
Other receivables	283,499	188,106
Prepaid expenses and other current assets	538,540	594,021
Total current assets	7,218,744	5,735,145
Film costs	459,426	427,336
Investments and advances:
Affiliated companies	226,218	207,922
Securities investments and other (including assets pledged that secured parties are permitted to sell or repledge of 930,882 million yen and 1,751,452 million yen in 2020 and 2021)	14,046,196	12,526,210
Allowance for credit losses	(8,419)
Long-term Investments, Total	14,263,995	12,734,132
Property, plant and equipment:
Land	79,557	81,482
Buildings	683,249	659,556
Machinery and equipment	1,748,961	1,725,720
Construction in progress	100,728	76,391
Property, Plant and Equipment, Gross, Total	2,612,495	2,543,149
Less - Accumulated depreciation	1,627,061	1,634,505
Property, plant and equipment, net	985,434	908,644
Other assets:
Operating lease right-of-use assets	337,322	359,510
Finance lease right-of-use assets	39,772	33,100
Intangibles, net	996,305	906,310
Goodwill	827,149	783,888
Deferred insurance acquisition costs	657,420	600,901
Deferred income taxes	207,470	210,372
Other	361,803	340,005
Other noncurrent assets	3,427,241	3,234,086
Total assets	26,354,840	23,039,343
Current liabilities:
Short-term borrowings	1,187,868	810,176
Current portion of long-term debt	131,699	29,807
Current portion of long-term operating lease liabilities	73,362	68,942
Notes and accounts payable, trade	599,569	380,810
Accounts payable, other and accrued expenses	1,756,833	1,630,197
Accrued income and other taxes	165,406	145,996
Deposits from customers in the banking business	2,773,885	2,440,783
Other	1,126,802	733,732
Total current liabilities	7,815,424	6,240,443
Long-term debt	773,294	634,966
Long-term operating lease liabilities	290,259	314,836
Accrued pension and severance costs	254,103	324,655
Deferred income taxes	366,761	549,538
Future insurance policy benefits and other	6,599,977	6,246,047
Policyholders' account in the life insurance business	4,331,065	3,642,271
Other	294,302	289,285
Total liabilities	20,725,185	18,242,041
Redeemable noncontrolling interest	8,179	7,767
Commitments and contingent liabilities
Sony Group Corporation's stockholders' equity:
Common stock, no par value — 2020 — Shares authorized: 3,600,000,000; shares issued: 1,261,058,781 2021 — Shares authorized: 3,600,000,000; shares issued: 1,261,058,781	880,214	880,214
Additional paid-in capital	1,486,721	1,289,719
Retained earnings	3,857,152	2,768,856
Accumulated other comprehensive income -
Unrealized gains on securities, net	101,305	161,191
Unrealized gains on derivative instruments, net	2,761	1,248
Pension liability adjustment	(223,468)	(235,520)
Foreign currency translation adjustments	(404,529)	(509,872)
Debt valuation adjustments	(89)	1,973
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total	(524,020)	(580,980)
Treasury stock, at cost Common stock 2020 — 40,898,841 shares 2021 — 21,831,206 shares	(124,228)	(232,503)
Stockholders' Equity Attributable to Parent, Total	5,575,839	4,125,306
Noncontrolling interests	45,637	664,229
Total equity	5,621,476	4,789,535
Total liabilities and equity	¥ 26,354,840	¥ 23,039,343

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Statement of Financial Position [Abstract]
Marketable securities current pledged with secured parties	¥ 48,899	¥ 17,521
Investment securities pledged with secured parties	¥ 1,751,452	¥ 930,882
Common stock, par value
Common stock, shares authorized	3,600,000,000	3,600,000,000
Common stock, shares issued	1,261,058,781	1,261,058,781
Treasury stock, common stock shares	21,831,206	40,898,841

Consolidated Statements of Inco

Consolidated Statements of Income - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Sales and operating revenue:
Revenue	¥ 8,999,360	¥ 8,259,885	¥ 8,665,687
Costs and expenses:
Cost of sales	5,072,596	4,753,174	5,150,750
Selling, general and administrative	1,469,955	1,502,625	1,576,825
Financial services expenses	1,488,963	1,171,875	1,112,446
Other operating (income) expense, net	7,468	(3,611)	(71,568)
Costs and Expenses, Total	8,038,982	7,424,063	7,768,453
Equity in net income (loss) of affiliated companies	11,487	9,637	(2,999)
Operating income	971,865	845,459	894,235
Other income:
Interest and dividends	10,457	19,278	21,618
Gain on equity securities, net	247,026		118,677
Other	6,752	2,671	4,440
Other income, Total	264,235	21,949	144,735
Other expenses:
Interest	12,185	11,090	12,467
Loss on equity securities, net		20,180
Foreign exchange loss, net	16,056	26,789	11,279
Net periodic benefit costs other than service costs	8,811	4,572
Other	6,678	5,327	3,576
Other expenses, Total	43,730	67,958	27,322
Income before income taxes	1,192,370	799,450	1,011,648
Income taxes:
Current	154,422	172,391	166,748
Deferred	(153,427)	4,799	(121,650)
Income tax expense, Total	995	177,190	45,098
Net income	1,191,375	622,260	966,550
Less — Net income attributable to noncontrolling interests	19,599	40,069	50,279
Net income attributable to Sony Group Corporation's stockholders	¥ 1,171,776	¥ 582,191	¥ 916,271
Net income attributable to Sony Group Corporation's stockholders
— Basic	¥ 952.29	¥ 471.64	¥ 723.41
— Diluted	¥ 936.90	¥ 461.23	¥ 707.74
Product and Service
Sales and operating revenue:
Revenue	¥ 7,252,766	¥ 6,856,090	¥ 7,306,235
Financial services revenue
Sales and operating revenue:
Revenue	1,661,520	1,299,847	1,274,708
Other Operating Revenue
Sales and operating revenue:
Revenue	¥ 85,074	¥ 103,948	¥ 84,744

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	¥ 1,191,375	¥ 622,260	¥ 966,550
Other comprehensive income, net of tax —
Unrealized gains (losses) on securities	(102,492)	40,390	33,285
Unrealized gains on derivative instruments	1,513	1,267	1,223
Pension liability adjustment	12,965	74,971	(13,960)
Foreign currency translation adjustments	106,826	(75,888)	8,444
Debt valuation adjustments	(3,120)	3,032
Total comprehensive income	1,207,067	666,032	995,542
Less — Comprehensive income attributable to noncontrolling interests	8,231	54,151	57,669
Comprehensive income attributable to Sony Group Corporation's stockholders	¥ 1,198,836	¥ 611,881	¥ 937,873

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	¥ 1,191,375	¥ 622,260	¥ 966,550
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation and amortization, including amortization of deferred insurance acquisition costs and contract costs	390,693	416,642	374,026
Amortization of film costs	273,044	329,809	348,493
Accrual for pension and severance costs, less payments	(42,936)	8,948	(33,631)
Other operating (income) expense, net	7,468	(3,611)	(71,568)
(Gain) loss on securities investments, net (other than financial services business)	(247,033)	20,177	(118,630)
(Gain) loss on marketable securities and securities investments held in the financial services business, net	(478,321)	93,088	(66,383)
Deferred income taxes	(153,427)	4,799	(121,650)
Equity in net (income) loss of affiliated companies, net of dividends	(4,948)	(5,114)	7,947
Changes in assets and liabilities:
(Increase) decrease in notes and accounts receivable, trade and contract assets	(37,779)	62,654	1,144
(Increase) decrease in inventories	(57,007)	40,315	30,455
Increase in film costs	(280,541)	(361,194)	(410,994)
Increase (decrease) in notes and accounts payable, trade	211,939	(91,435)	18,534
Increase (decrease) in accrued income and other taxes	80,165	(40,144)	(20,039)
Increase in future insurance policy benefits and other	905,343	520,683	544,179
Increase in deferred insurance acquisition costs	(102,289)	(99,433)	(88,807)
Increase in marketable securities held in the life insurance business	(156,132)	(124,270)	(64,034)
(Increase) decrease in other current assets	(102,400)	(37,286)	16,576
Increase (decrease) in other current liabilities	62,619	(27,083)	56,723
Other	(109,683)	19,940	(110,153)
Net cash provided by operating activities	1,350,150	1,349,745	1,258,738
Cash flows from investing activities:
Payments for purchases of fixed assets	(512,239)	(439,761)	(312,644)
Proceeds from sales of fixed assets	15,823	18,758	17,585
Payment for EMI Music Publishing acquisition, net of cash acquired			(244,197)
Proceeds from sales of businesses	3,151	12,816
Other	(23,481)	(14,729)	(30,821)
Net cash used in investing activities	(1,781,516)	(1,352,278)	(1,307,445)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	406,857	118,447	94,351
Payments of long-term debt	(98,134)	(198,055)	(382,671)
Increase in short-term borrowings, net	355,536	193,332	123,979
Increase in deposits from customers in the financial services business, net	467,286	258,720	246,945
Dividends paid	(61,288)	(49,574)	(38,067)
Payments for purchase of treasury stock	(366)	(200,211)	(100,177)
Other	(6,226)	(17,107)	(35,203)
Net cash provided by (used in) financing activities	666,967	65,658	(122,884)
Effect of exchange rate changes on cash and cash equivalents, including restricted	36,668	(21,643)	52,465
Net increase (decrease) in cash and cash equivalents, including restricted	272,269	41,482	(119,126)
Cash and cash equivalents, including restricted, at beginning of the fiscal year	1,515,295	1,473,813	1,592,939
Cash and cash equivalents, including restricted, at end of the fiscal year	1,787,564	1,515,295	1,473,813
Less - Restricted cash and cash equivalents, included in other current assets and other assets	582	2,938	3,740
Cash and cash equivalents at end of the fiscal year	1,786,982	1,512,357	1,470,073
Cash paid during the fiscal year for -
Income taxes	119,084	216,922	210,499
Interest	8,491	10,000	10,882
Non-cash investing and financing activities -
Conversion of convertible bonds	78,342	430	16
Obtaining assets by entering into finance leases	9,597	6,478	32,541
Financial Services Business
Cash flows from investing activities:
Payments for investments and advances	(1,631,017)	(1,319,062)	(1,078,250)
Proceeds from sales or return of investments and collections of advances	449,081	343,740	309,498
Other than financial service business
Cash flows from investing activities:
Payments for investments and advances	(103,143)	(48,853)	(53,525)
Proceeds from sales or return of investments and collections of advances	20,309	14,456	2,442
Nile Acquisition LLC
Cash flows from financing activities:
Payment for purchase of noncontrolling interest			(32,041)
Spotify Technology SA
Cash flows from investing activities:
Proceeds to sale of shares			¥ 82,467
Olympus Corporation
Cash flows from investing activities:
Proceeds to sale of shares		80,357
Game Show Network LLC
Cash flows from financing activities:
Payment for purchase of noncontrolling interest		¥ (39,894)
Sony Financial Holdings Inc
Cash flows from financing activities:
Proceeds from issuance of short-term borrowings in connection with payment for purchase of noncontrolling interest in Sony Financial Holdings Inc.	396,500
Payments of short-term borrowings in connection with payment for purchase of noncontrolling interest in Sony Financial Holdings Inc.	(396,500)
Payment for purchase of noncontrolling interest	¥ (396,698)

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - JPY (¥) ¥ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common stock	Additional paid-in capital	Retained earnings	Retained earningsCumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated other comprehensive income	Treasury stock, at cost	Sony Group Corporation's stockholders' equity	Sony Group Corporation's stockholders' equityCumulative Effect, Period of Adoption, Adjustment [Member]	Noncontrolling interests	Noncontrolling interestsCumulative Effect, Period of Adoption, Adjustment [Member]
Beginning Balance at Mar. 31, 2018	¥ 3,647,157		¥ 865,678	¥ 1,282,577	¥ 1,440,387		¥ (616,746)	¥ (4,530)	¥ 2,967,366		¥ 679,791
Cumulative effect of newly adopted ASUs	(2,118)				7,976		(15,526)		(7,550)		5,432
Issuance of new shares	862		431	431					862
Exercise of stock acquisition rights	16,348		8,174	8,174					16,348
Conversion of convertible bonds	16		8	8					16
Stock-based compensation	1,159			1,159					1,159
Comprehensive income:
Net income	966,550				916,271				916,271		50,279
Other comprehensive income, net of tax -
Unrealized gains on securities	33,285						24,370		24,370		8,915
Unrealized gains on derivative instruments	1,223						1,223		1,223
Pension liability adjustment	(13,960)						(14,013)		(14,013)		53
Foreign currency translation adjustments	8,444						10,022		10,022		(1,578)
Total comprehensive income	995,542								937,873		57,669
Stock issue costs, net of tax	(147)			(147)					(147)
Dividends declared	(73,009)				(44,048)				(44,048)		(28,961)
Purchase of treasury stock	(100,177)							(100,177)	(100,177)
Reissuance of treasury stock	4			1				3	4
Transactions with noncontrolling interests shareholders and other	(48,947)			(25,329)					(25,329)		(23,618)
Ending Balance at Mar. 31, 2019	4,436,690	¥ (7,472)	874,291	1,266,874	2,320,586	¥ (7,472)	(610,670)	(104,704)	3,746,377	¥ (7,472)	690,313
Issuance of new shares	1,058		529	529					1,058
Exercise of stock acquisition rights	10,359		5,179	5,180					10,359
Conversion of convertible bonds	430		215	215					430
Stock-based compensation	1,980			1,980					1,980
Comprehensive income:
Net income	622,260				582,191				582,191		40,069
Other comprehensive income, net of tax -
Unrealized gains on securities	40,390						26,156		26,156		14,234
Unrealized gains on derivative instruments	1,267						1,267		1,267
Pension liability adjustment	74,971						74,937		74,937		34
Foreign currency translation adjustments	(75,888)						(74,643)		(74,643)		(1,245)
Debt valuation adjustments	3,032						1,973		1,973		1,059
Total comprehensive income	666,032								611,881		54,151
Stock issue costs, net of tax	(80)			(80)					(80)
Dividends declared	(80,996)				(55,111)				(55,111)		(25,885)
Purchase of treasury stock	(200,211)							(200,211)	(200,211)
Reissuance of treasury stock	2			0				2	2
Cancellation of treasury stock				(1,072)	(71,338)			72,410
Transactions with noncontrolling interests shareholders and other	(38,257)			16,093					16,093		(54,350)
Ending Balance at Mar. 31, 2020	4,789,535	¥ (5,055)	880,214	1,289,719	2,768,856	¥ (3,669)	(580,980)	(232,503)	4,125,306	¥ (3,669)	664,229	¥ (1,386)
Exercise of stock acquisition rights	16,985			(354)	(735)			18,074	16,985
Conversion of convertible bonds	78,342				(11,060)			89,402	78,342
Stock-based compensation	1,577			1,577					1,577
Comprehensive income:
Net income	1,191,375				1,171,776				1,171,776		19,599
Other comprehensive income, net of tax -
Unrealized gains on securities	(102,492)						(90,521)		(90,521)		(11,971)
Unrealized gains on derivative instruments	1,513						1,513		1,513
Pension liability adjustment	12,965						12,962		12,962		3
Foreign currency translation adjustments	106,826						105,643		105,643		1,183
Debt valuation adjustments	(3,120)						(2,537)		(2,537)		(583)
Total comprehensive income	1,207,067								1,198,836		8,231
Dividends declared	(81,012)				(68,016)				(68,016)		(12,996)
Purchase of treasury stock	(366)							(366)	(366)
Reissuance of treasury stock	1,519			354				1,165	1,519
Transactions with noncontrolling interests shareholders and other	(387,116)			195,425			29,900		225,325		(612,441)
Ending Balance at Mar. 31, 2021	¥ 5,621,476		¥ 880,214	¥ 1,486,721	¥ 3,857,152		¥ (524,020)	¥ (124,228)	¥ 5,575,839		¥ 45,637

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - ¥ / shares	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared, per share	¥ 55	¥ 45	¥ 35

Nature of operations

Nature of operations	12 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of operations	1. Nature of operations Sony Corporation changed its name to “Sony Group Corporation”, effective as of April 1, 2021. Sony Group Corporation and its consolidated subsidiaries (hereinafter collectively referred to as “Sony” or “Sony Group”) are engaged in the development, design, production, manufacture, offer and sale of various kinds of electronic equipment, instruments and devices for consumer, professional and industrial markets such as network services, home gaming consoles and software, televisions, audio and video recorders and players, still and video cameras, smartphones, and image sensors. Sony’s primary manufacturing facilities are located in Asia including Japan. Sony also utilizes third-party contract manufacturers for certain products. Sony’s products and services are marketed throughout the world by sales subsidiaries and unaffiliated distributors as well as direct sales and offers via the internet. Sony is engaged in the development, production, manufacture, and distribution of recorded music and the management and licensing of the words and music of songs as well as production and distribution of animation titles, including game applications based on the animation titles. Sony is also engaged in the production, acquisition and distribution of motion pictures and television programming and the operation of television and digital networks. Further, Sony is also engaged in various financial services businesses, including life and non-life

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Summary of significant accounting policies	2. Summary of significant accounting policies The accompanying consolidated financial statements are presented in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Certain adjustments and reclassifications have been incorporated in the accompanying consolidated financial statements to conform with U.S. GAAP. These adjustments were not recorded in the statutory books and records as Sony Group Corporation and its subsidiaries in Japan maintain their records and prepare their statutory financial statements in accordance with accounting principles generally accepted in Japan, while its foreign subsidiaries maintain their records and prepare their financial statements in conformity with accounting principles generally accepted in the countries of their domicile. (1) Significant accounting policies Basis of consolidation and accounting for investments in affiliated companies - The consolidated financial statements include the accounts of Sony Group Corporation and its majority-owned subsidiary companies, general partnerships and other entities in which Sony has a controlling interest, and variable interest entities (“VIEs”) for which Sony is the primary beneficiary. All intercompany transactions and accounts are eliminated. Investments in business entities in which Sony does not have control, but has the ability to exercise significant influence over operating and financial policies, generally through 20-50% 3-5% On occasion, a consolidated subsidiary or an affiliated company accounted for by the equity method may issue its shares to third parties in either a public or private offering or upon conversion of convertible debt to common stock at amounts per share in excess of or less than Sony’s average per share carrying value. With respect to such transactions, the resulting gains or losses arising from the change in ownership interest are recorded in earnings within the fiscal year in which the change in interest transactions occurs. Gains or losses that result from a loss of a controlling financial interest in a subsidiary are recorded in earnings along with fair value remeasurement gains or losses on any retained investment in the entity, while a change in interest in a consolidated subsidiary that does not result in a change in control is accounted for as a capital transaction and no gains or losses are recorded in earnings. The excess of the cost over the underlying net equity of investments in consolidated subsidiaries and affiliated companies accounted for on an equity basis is allocated to identifiable tangible and intangible assets and liabilities based on fair values at the date of acquisition. The unassigned residual value of the excess of the cost over Sony’s underlying net equity is recognized as goodwill as a component of the investment balance. Use of estimates - The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The most significant estimates include those used in determining the valuation of investment securities, valuation of inventories, fair values of long-lived assets, fair values of goodwill and other intangible assets, fair values of assets and liabilities assumed in business combinations, product warranty liability, pension and severance plans, valuation of deferred tax assets, uncertain tax positions, film costs, and insurance related liabilities. Actual results could significantly differ from those estimates. The timing and extent to which the spread of COVID-19 Translation of foreign currencies - All asset and liability accounts of foreign subsidiaries and affiliates are translated into Japanese yen at appropriate fiscal year end exchange rates and all income and expense accounts are translated at exchange rates that approximate those rates prevailing at the time of the transactions. The resulting translation adjustments are accumulated as a component of accumulated other comprehensive income. Upon remeasurement of a previously held equity interest in accordance with the accounting guidance for business combinations achieved in stages, accumulated translation adjustments, if any, are included in earnings. Monetary assets and liabilities denominated in foreign currencies are translated at appropriate fiscal year end exchange rates and the resulting translation gains or losses are recognized into income. Cash, cash equivalents and restricted cash - Cash and cash equivalents include all highly liquid investments, with original maturities of three months or less, that are readily convertible to known amounts of cash and are so near maturity that they present insignificant risk of changes in value because of changes in interest rates. Sony includes restricted cash within cash and cash equivalents in the statement of cash flows. Marketable debt and equity securities - Debt securities designated as available-for-sale held-to-maturity available-for-sale held-to-maturity Debt securities designated as available-for-sale The assessment on the risk of credit losses for debt securities designated as held-to-maturity Equity securities that do not have readily determinable fair values - Equity securities that do not have readily determinable fair values are measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. If indicators for impairment are present for equity securities that do not have readily determinable fair values, Sony evaluates whether any such equity security is impaired. If any such security is judged to be impaired, Sony recognizes the impairment of the investment and the carrying value is adjusted to its fair value. Determination of impairment is based on the consideration of several factors, including operating results, business plans and estimated future cash flows. Fair value is determined through the use of various methodologies such as discounted cash flows, valuation of recent financings and comparable valuations of similar companies. Allowance for credit losses - Sony estimates expected credit losses and recognizes loss allowances for specific financial assets. The loss allowance for not e The loss allowance for securities investments and other is primarily recognized for debt securities classified as available-for-sale held-to-maturity past-due Sony also writes off the gross carrying amount of the financial assets when it cannot reasonably expect to recover all or part of the assets. For the loss allowance for debt securities classified as available-for-sale held-to-maturity, Marketable debt and equity securities” Inventories - Inventories in the Game & Network Services (“G&NS”), Music, Pictures, Electronics Products & Solutions (“EP&S”) and Imaging & Sensing Solutions (“I&SS”) segments are valued at cost, not in excess of the net realizable value – i.e., estimated selling price in the ordinary course of business less reasonably predictable costs of completion and disposal, cost being determined on the “average cost” basis. Other receivables - Other receivables include receivables which relate to arrangements with certain component manufacturers whereby Sony procures goods, including product components, for these component manufacturers and is reimbursed for the related purchases. No revenue or profit is recognized on these transfers. Sony will repurchase the inventory at a later date from the component manufacturers as either finished goods inventory or as partially assembled product. Film costs - Film costs, including direct production costs, production overhead and acquisition costs, are stated at the lower of unamortized cost or estimated fair value and classified as noncurrent assets. Film costs of content predominantly monetized individually are amortized, and the estimated liabilities for residuals and participations are accrued using an individual-film-forecast method based on the ratio of current period actual revenues to the estimated remaining total revenues. Film costs also include broadcasting rights, which are recognized when the license period begins and the program is available for use and consist of acquired programming to be aired on Sony’s worldwide channel network. Film costs of content predominantly monetized with other content, including broadcasting rights, are amortized based on estimated usage or on a straight-line basis over the useful life, as appropriate, although broadcasting rights licensed under multi-year live-event sports programming agreements are generally amortized based on the ratio of the current period’s actual advertising revenue and an allocation of subscription fee revenue to the estimated total remaining attributable revenues. Estimates used in calculating the fair value of film costs are based upon assumptions about future demand and market conditions and are reviewed on a periodic basis. Content produced by Television Productions and Motion Pictures in the Pictures segment is predominantly monetized individually. Substantially all content within Media Networks is predominantly monetized with other content. Property, plant and equipment and depreciation - Property, plant and equipment are stated at cost. Depreciation is computed using the straight-line method. Useful lives for depreciation range from 2 to 50 years for buildings and from 2 to 10 years for machinery and equipment. Significant renewals and additions are capitalized at cost. Maintenance and repairs, and minor renewals and betterments are charged to income as incurred. Leases - When entering into a contract, Sony determines whether an arrangement contains a lease at its inception. An arrangement contains a lease if it conveys the right to control the use of identified property, plant, or equipment (an identified asset) for a period of time in exchange for consideration. Operating leases are included in operating lease right-of-use right-of-use Right-of-use Right-of-use Right-of-use non-lease right-of-use As of April 1, 2019, Sony adopted Accounting Standards Update (“ASU”) 2016-02, which amends leasing guidance, on a modified retrospective basis with no restatement of comparative periods. Prior to the adoption of ASU 2016-02 on April 1, 2019, right-of-use assets and lease liabilities for operating leases were not recognized in Sony’s consolidated balance sheets. Goodwill and other intangible assets - Goodwill and indefinite lived intangible assets are tested annually for impairment during the fourth quarter of the fiscal year and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value below its carrying amount. Such an event or change in circumstances would include unfavorable variances from established business plans, significant changes in forecasted results or volatility inherent to external markets and industries, which are periodically reviewed by Sony’s management. In the fourth quarter of the fiscal year ended March 31, 2021, Sony elected not to perform an optional qualitative assessment of goodwill and instead proceeded directly to a quantitative impairment test by comparing the fair value of a reporting unit with its carrying amount. Reporting units are Sony’s operating segments or one level below the operating segments. If the fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is not considered impaired. If the carrying amount of a reporting unit exceeds its fair value, an impairment loss is recognized in an amount equal to that excess, not to exceed the total amount of goodwill allocated to the reporting unit. Indefinite lived intangible assets are tested for impairment by comparing the fair value of the intangible asset with its carrying value, and if the carrying value of the intangible asset exceeds its fair value, an impairment loss is recognized in an amount equal to that excess. The fair value of a reporting unit or indefinite lived intangible asset is generally determined using a discounted cash flow analysis. This approach uses significant estimates and assumptions, including projected future cash flows, the timing of such cash flows, discount rates reflecting the risk inherent in future cash flows, perpetual growth rates, earnings multiples, the determination of appropriate comparable entities and the determination of whether a premium or discount should be applied to comparables. Consideration is also given to Sony’s market capitalization in relation to the sum of the calculated fair values of the reporting units, including reporting units with no goodwill, and taking into account corporate level assets and liabilities not assigned to individual reporting units as well as a reasonable control premium. The assumptions used for projected future cash flows and the timing of such cash flows are based on the forecast and mid-range e When a business within a reporting unit is disposed of, goodwill is allocated to the disposed business using the relative fair value method. Management believes that the assumptions used to estimate the fair value in the goodwill impairment tests are reasonable, including, but not limited to, the potential impacts arising from the spread of COVID-19. Intangible assets with finite useful lives mainly consist of patent rights, know-how, internal-use know-how, internal-use Capitalized software - The costs related to establishing the technological feasibility of software to be sold, leased or otherwise marketed are expensed as incurred as a part of research and development in cost of sales. Costs that are incurred to produce the finished product after technological feasibility is established are capitalized and amortized to cost of sales over the estimated economic life, which is generally three years. The technological feasibility of game software is established when the product master is completed. Consideration to capitalize game software development costs before this point is limited to the development costs of games for which technological feasibility can be proven at an earlier stage. At each balance sheet date, Sony performs reviews to ensure that unamortized capitalized software costs remain recoverable from future profits of the related software products. The costs incurred for internal-use Deferred insurance acquisition costs - Costs that vary with and are directly related to the acquisition or renewal of insurance policies are deferred as long as they are recoverable. The deferred insurance acquisition costs include such items as commissions, medical examination costs and inspection report fees, and are subject to recoverability testing at least annually to ensure that the capitalized amounts do not exceed the present value of anticipated gross profits or premiums less benefits and maintenance expenses, as applicable. The deferred insurance acquisition costs for traditional life insurance contracts are amortized over the premium-paying period of the related insurance policies using assumptions consistent with those used in computing policy reserves. The deferred insurance acquisition costs for non-traditional Product warranty - Sony provides for the estimated cost of product warranties at the time revenue is recognized. The product warranty is calculated based upon product sales, estimated probability of failure and estimated cost per claim. The variables used in the calculation of the provision are reviewed on a periodic basis. Future insurance policy benefits - Liabilities for future insurance policy benefits are primarily comprised of the present value of estimated future payments to policyholders. These liabilities are computed by the net level premium method based upon the assumptions as to future investment yield, morbidity, mortality, withdrawals and other factors. These assumptions are reviewed on a periodic basis. Liabilities for future policy benefits includes the liabilities for the minimum guarantee benefits of variable annuities and variable life insurance contracts. As discussed below in “ Fair value measurement Policyholders’ account in the life insurance business - Liabilities for policyholders’ account in the life insurance business represent the contract value that has accrued to the benefit of the policyholders as of the balance sheet date. This liability is generally equal to the accumulated account deposits, plus interest credited, less policyholder withdrawals and other charges assessed against the account balances. Liabilities for policyholders’ account in the life insurance business includes the liabilities related to the variable annuities and variable life insurance contracts with minimum guarantee benefits. As discussed below in “ Fair value measurement Impairment of long-lived assets - Sony reviews the recoverability of the carrying value of its long-lived assets held and used, other than goodwill and intangible assets with indefinite lives, and assets to be disposed of, whenever events or changes in circumstances indicate that the individual carrying amount of an asset or asset group may not be recoverable. Long-lived assets to be held and used are reviewed for impairment by comparing the carrying value of the asset or asset group with their estimated undiscounted future cash flows. If the cash flows are determined to be less than the carrying value of the asset or asset group, an impairment loss would be recognized during the period for the amount by which the carrying value of the asset or asset group exceeds estimated fair value. Long-lived assets that are to be disposed of other than by sale are considered held and used until they are disposed of. Long-lived assets that are to be disposed of by sale are reported at the lower of their carrying value or fair value less cost to sell and are not depreciated. Fair value is determined using the present value of estimated net cash flows or comparable market values. This approach uses significant estimates and assumptions including projected future cash flows, the timing of such cash flows, discount rates reflecting the risk inherent in future cash flows, perpetual growth rates applied to determine terminal values, determination of appropriate market comparables and the determination of whether a premium or discount should be applied to comparables. Management believes that the estimates of future cash flows and fair values are reasonable, including, but not limited to, the potential impacts arising from the spread of COVID-19. Fair value measurement - Sony measures fair value as an exit price, or the amount that would be received to sell an asset or paid to transfer a liability elected the fair value option in the banking business for certain foreign securities. The election was made to mitigate accounting mismatches related to fluctuations of foreign exchange rates by allowing the gains and losses on the translation of these securities to be included in current earnings. Sony has also elected the fair value option for certain future insurance policy benefits and policyholders’ account in the life insurance business which are not normally measured at fair value. The election was made to mitigate accounting mismatches related to the changes in the fair value between liabilities for those future insurance policy benefits and policyholders’ account due to changes in the minimum guarantee risk of contracts of variable annuities with minimum guarantee benefits, and the underlying investment managed for policyholders and derivatives. Changes in fair value resulting from changes in instrument-specific credit risk were estimated by incorporating the certain subsidiary’s current credit spreads, and are recognized in other comprehensive income, net of tax. The accounting guidance for fair value measurements specifies a hierarchy of inputs to valuation techniques based on the extent to which inputs used in measuring fair value are observable in the market. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Sony’s assumptions about the assumptions that market participants would use in pricing the asset or liability. Observable market data is used if such data is available without undue cost and effort. Each fair value measurement is reported in one of three levels which is determined by the lowest level input that is significant to the fair value measurement in its entirety. These levels are: Level 1 — Inputs are unadjusted quoted prices for identical assets and liabilities in active markets. Level 2 — Inputs are based on observable inputs other than level 1 prices, such as quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations, in which all significant inputs are observable in active markets. Level 3 — One or more significant inputs are unobservable. When available, Sony uses unadjusted quoted market prices in active markets to measure fair value and classifies such items within level 1. If quoted market prices are not available, fair value is based upon internally developed valuation techniques that use, where possible, current market-based or independently sourced market parameters, such as interest rates, currency rates and option volatilities. Items valued using internally generated models are classified according to the lowest level input that is significant to the valuation. For certain financial assets and liabilities, Sony determines fair value using third-party information such as indicative quotes from dealers and quantitative input from investment advisors following Sony’s established valuation procedures including validation against internally developed prices. Additionally, Sony considers both counterparty credit risk and Sony’s own creditworthiness in determining fair value. Sony attempts to mitigate credit risk to third parties by entering into netting agreements and actively monitoring the creditworthiness of counterparties and its exposure to credit risk through the use of credit limits and by selecting major international banks and financial institutions as counterparties. Derivative financial instruments - All derivatives are recognized as either assets or liabilities in the consolidated balance sheets at fair value on a gross basis. Changes in the fair value of derivative financial instruments are either recognized periodically in income or stockholders’ equity (as a component of accumulated other comprehensive income), depending on whether the derivative financial instrument qualifies as a hedge and the derivative is being used to hedge changes in fair value or cash flows. The accounting guidance for hybrid financial instruments permits an entity to elect fair value remeasurement for any hybrid financial instrument if the hybrid instrument contains an embedded derivative that would otherwise be required to be bifurcated and accounted for separately under accounting guidance for derivative instruments and hedging activities. The election to measure the hybrid instrument at fair value is made on an instrument-by-instrument In accordance with accounting guidance for derivative instruments and hedging activities, various derivative financial instruments held by Sony are classified and accounted for as described below. Fair value hedges Changes in the fair value of derivatives designated as fair value hedges for recognized assets or liabilities or unrecognized firm commitments are recognized in earnings as offsets to changes in the fair value of the related hedged assets or liabilities. Cash flow hedges Changes in the fair value of derivatives designated as cash flow hedges for forecasted transactions or exposures associated with recognized assets or liabilities are initially recorded in other comprehensive income and reclassified into earnings when the hedged transaction affects earnings. The time value component of the fair value of option contracts is excluded from the assessment of hedge effectiveness and recognized in earnings on a straight-line basis over the life of the hedging instruments. Any difference between the change in fair value of the excluded component and the accumulated amount recognized in earnings on a straight-line basis is recognized in other comprehensive income. Derivatives not designated as hedges Changes in the fair value of derivatives that are not designated as hedges are recognized immediately in earnings. Assessment of hedges When applying hedge accounting, Sony formally documents all hedging relationships between the derivatives designated as hedges and the hedged items, as well as its risk management objectives and strategies for undertaking various hedging activities. Sony links all hedges that are designated as fair value or cash flow hedges to specific assets or liabilities on the consolidated balance sheets or to the specific forecasted transactions. Sony also assesses, both at the inception of the hedge and on an on-going Stock-based compensation - Sony accounts for stock-based compensation using the fair value-based method and the expense is mainly included in selling, general and administrative expenses. Sony accounts for its stock acquisition rights plan using the fair value measured on the date of grant using the Black-Scholes option-pricing model. The stock acquisition rights plan is recognized, net of an estimated forfeiture rate, over the requisite service period using the accelerated method of amortization for grants with graded vesting. The estimated forfeiture rate is based on Sony’s historical experience in the stock acquisition rights plans where the majority of the vesting terms have b e Revenue recognition - Sony recognizes revenue in an amount that reflects the consideration Sony expects in exchange for satisfying performance obligations to transfer the goods or services promised in contracts with customers. This is in accordance with the following steps: Step 1: Identify the contract(s) with a customer. Step 2: Identify the performance obligations in the contract. Step 3: Determine the transaction price. Step 4: Allocate the transaction price to the performance obligations in the contract. Step 5: Recognize revenue when (or as) Sony satisfies a performance obligation. Sony owns a variety of intellectual property throughout its segments and recognizes revenue through the licensing of such intellectual property. Sony has both functional and symbolic intellectual property. The licensing of functional intellectual property grants a customer a right to use Sony’s intellectual property as it exists at a point in time, and Sony satisfies its performance obligation at the point in time when the customer obtains control and is entitled to benefit from the license. The licensing of symbolic intellectual property grants a customer a right to access Sony’s intellectual property over time, and Sony satisfies its performance obligation over the license period as S o Incremental costs of obtaining a contract and costs to fulfill a contract are recognized as assets when Sony expects to recover these costs. The incremental costs of obtaining a contract are those costs that would not have been incurred if the contract had not been obtained. Costs to fulfill a contract are those costs that are directly related to a contract or to an anticipated contract and that generate or enhance resources for Sony to satisfy its performance obligations. Sony applies a practical expedient and recognizes the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that would have been recognized is one year or less. Performance obligations in contracts for the EP&S and I&SS segments are primarily to deliver various kinds of electronic equipment, instruments and devices to customers. Revenues from these performance obligations are generally recognized when a promised good is delivered to a customer. However, if the sales contract contains a customer acceptance provision, then revenues are recognized when the customer accepts the promised good or when a deemed acceptance occurs by the lapse of time. Revenues are also recognized over time, primarily from the provision of internet broadband network services to subscribers over the subscription period. Revenues are recognized net of anticipated returns and sales incentives. Within the G&NS segment, revenues from hardware, peripherals and software discs are recognized when performance obligations are satisfied by transferring control to the retailer/distributor, net of anticipated returns, sales incentives and cooperative advertising obligations. Revenues from platform licensing to publishers are recognized when physical software discs are delivered. Revenues from digital game content, which is licensed functional intellectual property, are recognized when the digital content is made available for use by the licensee via an online platform, net of anticipated sales incentives and credit card chargebacks. Revenues from digital game content involving multiple performance obligations, such as obligations to make content available on future dates, are allocated to each performance obligation based on the relative standalone selling prices that are observable in the market or Sony’s best estimate. Revenues from subscription fees for digital subscription services are recognized over the subscription period. Within the Music segment, Sony licenses intellectual property that transfer to a customer either a right to use Sony’s intellectual property as it exists at the point in time in which the license is granted, or a right to access Sony’s intellectual property as it exists throughout the license period. Revenues are recognized when the customer has the right to use or access the intellectual property and obtains control of the use or access of that license. Digital revenues include revenues from contracts with digital streaming services typically recognized as a single performance obligation, which is ongoing access to intellectual property in an evolving library of content over the contract term, predicated on: (1) the business practice and contractual ability to remove specific content without a requirement to replace the content and without impact to minimum royalty guarantees and (2) the contracts not containing a specific listing of content subject to the license. For these contracts, revenues are recognized on the basis of sales and usage royalties, except where there is an amount of a minimum royalty guarantee that is not expected to be recouped, or a fixed fee, which is recognized on a straight-line basis over the term of the contract. Revenues from the sale of physical product such as CDs, net of anticipated returns and sales incentives, are recognized when delivery has occurred and the product is available for sale to the public. Within the Pictures segment, revenues from the theatrical exhibition of motion pictures are recognized as the customer exhibits the film. Revenues from the licensing of motion picture and television programming for pay and free television exhibition and other markets are recognized when the product is available for use by the licensee. Revenues for motion picture and television program licensing arrangements involving multiple performance obligations, for example a fee for multiple titles, territories or availability dates, are allocated based on the relative standalone selling price of each performance obligation using Sony’s best estimate based on available information such as market conditions and internal pricing guidelines. Each individual motion picture or television programming product delivered generally represents a separate performance obligation. Licensing revenue associated with certain renewals or extensions of existing agreements for motion pictures and television programming is recognized when the licensee can use and benefit from the content under the renewal or extension. Licensing revenue associated with minimum guarantees for symbolic intellectual property is recognized ratably over the license term. For home entertainment distribution, revenues from the sale of physical product such as DVDs and Blu-ray TM delivery has occurred and the product is available for sale to the public. Revenues from electronic sell-through and video-on-demand p

Inventories

Inventories	12 Months Ended
	Mar. 31, 2021
Inventory Disclosure [Abstract]
Inventories	3. Inventories Inventories are comprised of the following: Yen in millions March 31 2020 2021 Finished products 345,231 398,478 Work in process 149,969 133,560 Raw materials, purchased components and supplies 94,769 105,353 Inventories 589,969 637,391

Film costs

Film costs	12 Months Ended
	Mar. 31, 2021
Other Industries [Abstract]
Film costs	4. Film costs Film costs are comprised of the following: Yen in millions March 31 2020 2021 Motion picture productions: Released 99,482 68,302 Completed and not released 18,776 20,148 In production and development 67,199 141,268 Television productions: Released 186,344 126,236 In production and development 25,093 33,712 Film costs for content predominantly monetized individually 396,894 389,666 Film costs for Media Networks content*1 61,959 69,760 Less: current portion of broadcasting rights included in inventories *2 (31,517 ) — Film costs 427,336 459,426 *1 Substantially all of Sony’s film costs for Media Networks content are broadcasting rights and predominantly monetized with other content. *2 Sony adopted ASU 2019-02 effective as of April 1, 2020, and as a result, broadcasting rights in the Pictures segment and animation film production costs in the Music segment were reclassified from inventories to film costs. The amortization of film costs is recorded in cost of sales. Amortization expense of film costs of content predominantly monetized individually was million yen and million yen during the fiscal years ended March 31, 2020, and 2021, respectively. Amortization expense of film costs of content predominantly monetized as part of a film group was million yen and million yen during the fiscal years ended March 31, 2020, and 2021, respectively. 67% of film costs for completed and not released content is expected to be amortized in the next twelve months. Unamortized film costs for released content and Media Networks content at March 31, 2021 are expected to be amortized as follows: Fiscal year ending March 31 Film costs for released content Film costs for 2022 77 % 42 % 2023 11 % 24 % 2024 3 % 14 % Total 91 % 80 % Approximately 167 billion yen of accrued participation liabilities included in accounts payable, other and accrued expenses are expected to be paid during the next twelve months.

Investments in affiliated compa

Investments in affiliated companies	12 Months Ended
	Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Investments in affiliated companies	5. Investments in affiliated companies The summarized combined financial information that is based on information provided by the equity investees including information for significant equity affiliates and the reconciliation of such information to the consolidated financial statements is shown below: Balance Sheets Yen in millions March 31 2020 2021 Current assets 389,195 435,910 Noncurrent assets 164,852 172,795 Current liabilities 194,219 208,306 Noncurrent liabilities and noncontrolling interests 60,469 61,232 Percentage of ownership in equity investees 20%-50 % 20%-50 % Statements of Income Yen in millions Fiscal year ended March 31 2019 2020 2021 Net revenues 390,457 387,678 414,934 Operating income 53,920 58,431 78,096 Net income attributable to controlling interests 5,539 34,916 46,914 Percentage of ownership in equity investees 20%-50 % 20%-50 % 20%-50 % On November 14, 2018, Sony Corporation of America (“SCA”), Sony’s wholly-owned subsidiary, completed the acquisition of the entirety of the approximately equity interest held by the investor consortium led by the Mubadala Investment Company in DH Publishing, L.P. (“EMI”), which owned and managed EMI Music Publishing. As a result of this acquisition, EMI became a wholly-owned subsidiary of Sony as described in Note 24. The carrying value of Sony’s investment in M3, Inc. (“M3”) exceeded its proportionate share in the underlying net assets of M3 by 65,541 million yen at March 31, 2021. The excess i web-portal. With the exception of M3 as described above, there was no significant difference between Sony’s proportionate share in the underlying net assets of the investees and the carrying value of investments in affiliated companies at March 31, 2020 and 2021. On December 19, 2019, SRE Holdings Corporation (“SRE”), Sony’s consolidated subsidiary, became a publicly listed company on the Tokyo Stock Exchange Mothers market (the “Listing”). Upon the Listing, Sony sold a portion of its shares of SRE, and shares issued by SRE were publicly offered (collectively, the “Sale”). Sony’s ownership of SRE’s total shares, which was 56.3% before the Sale, has decreased to 44.5% after the Sale. As a result, SRE has become an affiliate accounted for under the equity method of Sony. In connection with the Sale, Sony recorded a gain of 17,266 million yen, which consisted of both a remeasurement gain based on fair value for the shares Sony continues to hold after the Sale, and a realized gain for the sold shares, in other operating (income) loss, net in the consolidated statements of income for the fiscal year ended March 31, 2020. On January 29, 2020, Sony Life Insurance Co., Ltd.(“Sony Life”), Sony’s consolidated subsidiary, completed the acquisition of the entirety of 50% equity interest held by AEGON International B.V. in AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd. (collectively, the “JVs”). As a result of this acquisition, the JVs became consolidated subsidiaries of Sony as described in Note 24. AEGON Sony Life Insurance Co., Ltd. changed its name to “Sony Life With Insurance Co., Ltd.,” as of April 1, 2020, and Sony Life With Insurance Co., Ltd., was subsequently merged with Sony Life as of April 1, 2021. Several affiliated companies are listed on the Tokyo Stock Exchange and Sony’s investments in these companies have an aggregate carrying value and fair value of 150,339 million yen and 1,785,481 million yen, respectively, as of March 31, 2021. The number of affiliated companies accounted for under the equity method as of March 31, 2020 and 2021 were 140 and 135, respectively. Account balances and transactions with affiliated companies accounted for under the equity method are presented below. There are no other material transactions or account balances with any other related parties. Yen in millions March 31 2020 2021 Accounts receivable, trade 12,030 5,814 Other receivables 1,589 3,014 Other current assets 9,757 16,097 Accounts payable, trade 1,497 1,409 Short-term borrowings 31,557 21,367 Finance lease liabilities and other 34,564 48,018 Operating lease liabilities 2,393 2,730 Yen in millions Fiscal year ended March 31 2019 2020 2021 Sales 41,437 35,951 32,372 Purchases 5,584 3,479 3,058 Sony entered into sale and leaseback transactions regarding certain machinery and equipment with SFI Leasing Company, Limited (“SFIL”), a leasing company in Japan, in the fiscal year ended March 31, 2019. SFIL is accounted for under the equity method and is 34% owned by Sony. MITSUI-SOKO Supply Chain Solutions, Inc. is accounted for under the equity method and is 34% owned by Sony as a result of the sale of the logistics business on April 1, 2015. As of the fiscal years ended March 31, 2020 and 2021, account balances with MITSUI-SOKO Supply Chain Solutions, Inc. and its subsidiaries were 1,181 million yen and 1,649 million yen, respectively, which are mainly included in accrued expenses. For the fiscal years ended March 31, 2020 and 2021, transactions were 6,069 million yen and 7,139 million yen, respectively, which are mainly included in general and administrative expenses. Dividends from affiliated companies accounted for under the equity method for the fiscal years ended March 31, 2019, 2020 and 2021 were 4,948 million yen, 4,523 million yen and 6,539 million yen, respectively.

Transfer of financial assets

Transfer of financial assets	12 Months Ended
	Mar. 31, 2021
Transfers and Servicing [Abstract]
Transfer of financial assets	6. Transfer of financial assets Sony has established several accounts receivable sales programs mainly within the EP&S segment. Through these programs, Sony can sell receivables to a commercial bank or a special purpose entity associated with a sponsor bank. Total receivables sold during the fiscal years ended March 31, 2019, 2020 and 2021 were 81,947 million yen, 65,214 million yen and 36,664 million yen, respectively. These transactions are accounted for as sales in accordance with the accounting guidance for transfers of financial assets, because Sony has relinquished control of the receivables. Sony includes the sales proceeds from these receivables as cash flows within operating activities in the consolidated statement of cash flows because the receivables are the result of operating activities and are short term in nature. Gains and losses from these transactions were insignificant. Although Sony continues servicing the receivables subsequent to being sold or contributed, no servicing assets or liabilities are recorded as the costs of collection of the sold receivables and the income from servicing such receivables are insignificant. Certain accounts rec e

Marketable securities and secur

Marketable securities and securities investments	12 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Marketable securities and securities investments	7. Marketable securities and securities investments Marketable securities and securities investments, primarily held in the Financial Services segment, include debt securities for which the aggregate cost, gross unrealized gains and losses and fair value pertaining to available-for-sale held-to-maturity Yen in millions March 31, 2020 March 31, 2021 Cost Gross Gross Fair value Cost Gross Gross Fair value Debt securities: Available-for-sale Japanese national government bonds 1,552,036 210,459 (566 ) 1,761,929 2,301,995 159,880 (18,609 ) 2,443,266 Japanese local government bonds 69,132 73 (33 ) 69,172 73,989 94 (20 ) 74,063 Japanese corporate bonds 202,164 19,112 (567 ) 220,709 259,932 13,356 (1,475 ) 271,813 Foreign government bonds 198,777 81,014 (14 ) 279,777 323,557 23,118 (20,819 ) 325,856 Foreign corporate bonds 361,422 507 (2,179 ) 359,750 382,231 1,102 (459 ) 382,874 Securitized products 205,223 0 — 205,223 198,593 — — 198,593 Other 14,398 1,867 (12 ) 16,253 42,469 3,492 (140 ) 45,821 2,603,152 313,032 (3,371 ) 2,912,813 3,582,766 201,042 (41,522 ) 3,742,286 Held-to-maturity Japanese national government bonds 6,204,505 2,098,885 (1,397 ) 8,301,993 6,244,125 1,650,057 (13,390 ) 7,880,792 Japanese local government bonds 2,504 331 — 2,835 1,716 294 — 2,010 Japanese corporate bonds 482,050 61,176 (4,754 ) 538,472 543,870 36,071 (14,919 ) 565,022 Foreign government bonds 723,937 302,297 — 1,026,234 850,740 51,494 (25,277 ) 876,957 Foreign corporate bonds 98 7 — 105 27,392 572 (109 ) 27,855 Securitized products 5,418 — (421 ) 4,997 69,062 65 (4 ) 69,123 7,418,512 2,462,696 (6,572 ) 9,874,636 7,736,905 1,738,553 (53,699 ) 9,421,759 Total 10,021,664 2,775,728 (9,943 ) 12,787,449 11,319,671 1,939,595 (95,221 ) 13,164,045 The following table presents the cost and fair value of debt securities classified as available-for-sale held-to-maturity Yen in millions March 31, 2021 Available-for-sale Held-to-maturity Cost Fair value Cost Fair value Due in one year or less 568,574 568,625 6,680 6,757 Due after one year through five years 419,311 434,470 288,952 307,127 Due after five years through ten years 650,929 725,747 252,897 284,725 Due after ten years 1,943,952 2,013,444 7,188,376 8,823,150 Total 3,582,766 3,742,286 7,736,905 9,421,759 Proceeds from sales of available-for-sale Marketable securities classified as trading securities, which are held primarily in the Financial Services segment, totaled 270,120 million yen and 288,895 million yen as of March 31, 2020 and 2021, respectively. Sony recorded net unrealized gains of 3,610 million yen, net unrealized gains of 1,705 million yen, and net unrealized losses of 1,055 million yen for the fiscal years ended March 31, 2019, 2020 and 2021, respectively. Changes in the fair value of trading securities are primarily recognized in financial services revenue in the consolidated statements of income. The following tables present the gross unrealized losses on, and fair value of, Sony’s investment securities with unrealized losses, aggregated by investment category and the length of time that individual investment securities have been in a continuous unrealized loss position, at March 31, 2020 and 2021. Yen in millions March 31, 2020 Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized Debt securities: Available-for-sale Japanese national government bonds 51,746 (539 ) 2,032 (27 ) 53,778 (566 ) Japanese local government bonds 25,010 (10 ) 16,340 (23 ) 41,350 (33 ) Japanese corporate bonds 62,118 (548 ) 10,694 (19 ) 72,812 (567 ) Foreign government bonds — — 1,537 (14 ) 1,537 (14 ) Foreign corporate bonds 86,220 (2,133 ) 18,896 (46 ) 105,116 (2,179 ) Securitized products — — — — — — Other 12,055 (12 ) — — 12,055 (12 ) Total 237,149 (3,242 ) 49,499 (129 ) 286,648 (3,371 ) Yen in millions March 31, 2021 Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized Debt securities: Available-for-sale Japanese national government bonds 485,941 (18,418 ) 29,424 (191 ) 515,365 (18,609 ) Japanese local government bonds 20,421 (8 ) 15,256 (12 ) 35,677 (20 ) Japanese corporate bonds 73,238 (925 ) 42,310 (550 ) 115,548 (1,475 ) Foreign government bonds 128,085 (20,800 ) 1,522 (19 ) 129,607 (20,819 ) Foreign corporate bonds 29,651 (302 ) 12,026 (157 ) 41,677 (459 ) Securitized products — — — — — — Other 1,162 (140 ) — — 1,162 (140 ) Total 738,498 (40,593 ) 100,538 (929 ) 839,036 (41,522 ) At March 31, 2021, Sony determined that the decline in value for securities with unrealized losses shown in the above table has not resulted from credit losses. For the fiscal y On April 3, 2018, Spotify was publicly listed for trading on the New York Stock Exchange. Sony owned 5.707% of Spotify’s shares at the time of the public listing. During the fiscal year ended March 31, 2019, Sony sold a portion of the Spotify shares that it owned for aggregate consideration of 82,616 million yen (768 million U.S. dollars) in cash proceeds. The sale of such shares, offset by costs to be paid to Sony’s artists and distributed labels and other transaction costs which directly related to the gains recognized from the sale of Spotify shares, resulted in a net pre-tax The remaining Spotify shares retained as of March 31, 2019 had a gross fair value of 78,947 million yen (711 million U.S. dollars), and the revaluation of such shares resulted in a pre-tax recorded in gain on equity securities, net in the consolidated statement of income for the fiscal year ended March 31, 2019. During the fiscal year ended March 31, 2020, Sony did not sell any portion of the Spotify shares that it owned. The revaluation of the remaining Spotify shares retained as of March 31, 2020 resulted in a pre-tax recorded in loss on equity securities, net in the consolidated statements of income for the fiscal year ended March 31, 2020. During the fiscal year ended March 31, 2021, Sony did not sell any portion of the Spotify shares that it owned. The revaluation of the remaining Spotify shares retained as of March 31, 2021 resulted in a pre-tax recorded in gain on equity securities, net in the consolidated statements of income for the fiscal year ended March 31, 2021. The aggregate carrying amounts of securities that do not have readily determinable fair values as of March 31, 2020 and 2021 totaled 30,120 million yen and 82,744 million yen, respectively. Sony recorded no upward adjustments for securities that do not have readily determinable fair values for the fiscal year ended March 31, 2019, and upward adjustments of million yen for securities that do not have readily determinable fair values for the fiscal years ended March 31, 2020 and 2021, respectively. The upward adjustments primarily resulted from new stock issuances by investees which were deemed to be observable price changes and the adjustments were calculated based on the price of such issuances. Sony recorded downward adjustments (including impairments) of million yen for securities that do not have readily determinable fair values for the fiscal years ended March 31, 2019, 2020 and 2021, respectively. The following table presents the cost of debt securities classified as held-to-maturity securities by a credit quality indicator based on a ratings system, which is primarily a composite of external ratings at March These debt securities held primarily in the Financial Services segment are substantially all composed of investment grade securities. Yen in millions March 31 2020 2021 Debt securities: Held-to-maturity AAA 5,516 69,161 AA 1,193,053 1,465,168 A 6,219,943 6,202,576 BBB — — Other — — Total 7,418,512 7,736,905

Leases

Leases	12 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases	8. Leases Sony leases certain communication and commercial equipment, plant, office space, warehouses, employees’ residential facilities and other assets under both finance and operating leases. (1) Lease cost The components of lease cost are as follows: Yen in millions Fiscal year ended March 31 2020 2021 Finance Lease cost Amortization of right-of-use 10,077 7,795 Interest on lease liabilities 1,266 863 Total finance lease cost 11,343 8,658 Operating lease cost 76,863 80,309 Short-term lease cost 20,620 17,805 Variable lease cost 141 108 Sublease income (3,860 ) (2,256 ) Total lease cost 105,107 104,624 (2) Supplemental consolidated balance sheet information related to leases Supplemental consolidated balance sheet information related to leases is as follows: Yen in millions March 31 2020 2021 Finance leases Current portion of long-term debt 9,240 7,382 Long-term debt 29,843 43,684 Total finance lease liabilities 39,083 51,066 March 31 2020 2021 Weighted average remaining lease term Operating leases 8.61 years 8.08 years Finance leases 9.91 years 16.85 years March 31 2020 2021 Weighted average discount rate Operating leases 2.338 % 2.119 % Finance leases 3.147 % 1.776 % (3) Maturities of lease liabilities Maturities of lease liabilities as of March 31, 2021 are as follows: Yen in millions Fiscal year ending March 31 Operating leases Finance leases 2022 79,980 8,309 2023 65,595 6,909 2024 55,127 5,067 2025 36,893 4,306 2026 29,850 2,941 Later fiscal years 130,838 33,869 Total lease payments 398,283 61,401 Less imputed interest 34,662 10,335 Total 363,621 51,066 (4) Other information Other information related to leases is as follows: Yen in millions Fiscal year ended 2020 2021 Cash paid for amounts included in the measurement of lease liabilities Payments for operating leases, included in cash flows from operating activities 71,612 75,907 Payments for finance leases, included in cash flows from financing activities 33,088 9,311 Right-of-use 124,380 46,710

Goodwill and other intangible a

Goodwill and other intangible assets	12 Months Ended
	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and other intangible assets	9. Goodwill and other intangible assets Intangible assets other than goodwill acquired during the fiscal year ended March 31, 2021 totaled 187,596 million yen, which are subject to amortization, and are comprised of the following: Intangible assets acquired during the fiscal year Weighted-average Yen in millions Years Patent rights, know-how 14,131 5 Software to be sold, leased or otherwise marketed 17,255 3 Internal-use 87,788 5 Music catalogs 61,341 19 Other 7,081 3 In the fiscal year ended March 31, 2021, additions to internal-use Intangible assets subject to amortization are comprised of the following: Yen in millions March 31, 2020 March 31, 2021 Gross carrying Accumulated Gross carrying Accumulated Patent rights, know-how 173,800 (154,772 ) 180,379 (143,448 ) Customer relationships 16,104 (12,467 ) 18,681 (13,962 ) Trademarks 11,115 (6,079 ) 11,177 (6,394 ) Software to be sold, leased or otherwise marketed 141,111 (110,663 ) 156,820 (124,819 ) Internal-use 594,109 (384,236 ) 660,133 (437,438 ) Music catalogs 612,266 (124,787 ) 708,320 (151,568 ) Artist contracts 41,764 (29,017 ) 42,902 (30,425 ) Television carriage contracts (broadcasting agreements) 53,266 (21,645 ) 55,752 (27,162 ) Other 56,769 (42,631 ) 63,102 (57,001 ) Total 1,700,304 (886,297 ) 1,897,266 (992,217 ) The aggregate amortization expense for intangible assets for the fiscal years ended March 31, 2019, 2020 and 2021 was 109,452 million yen, 110,819 million yen and 118,260 million yen, respectively. The estimated aggregate amortization expense for intangible assets for the next five fiscal years is as follows: Fiscal year ending March 31 Yen in millions 2022 102,884 2023 88,057 2024 66,244 2025 48,197 2026 33,799 Total carrying amount of intangible assets having an indefinite life is comprised of the following: Yen in millions March 31 2020 2021 Trademarks 69,975 70,265 Distribution agreements 18,834 18,834 Other 3,494 2,157 Total 92,303 91,256 The changes in the carrying amount of goodwill by segment for the fiscal years ended March 31, 2020 and 2021 are as follows: G&NS Music Pictures EP&S I&SS Financial All Other Total Balance, March 31, 2019: Goodwill — gross 153,955 403,676 252,262 194,416 46,564 7,931 28,570 1,087,374 Accumulated impairments — (306 ) (106,778 ) (182,462 ) — (706 ) (28,570 ) (318,822 ) Goodwill 153,955 403,370 145,484 11,954 46,564 7,225 — 768,552 Increase (decrease) due to: Acquisitions 17,945 2,956 14,889 364 — 3,609 — 39,763 Sales and dispositions — — (609 ) — — — — (609 ) Impairments — — — — — — — — Translation adjustments (926 ) (13,802 ) (5,410 ) (129 ) (372 ) — — (20,639 ) Other — (1,199 ) (1,980 ) — — — — (3,179 ) Balance, March 31, 2020: Goodwill — gross 170,974 391,631 257,074 194,635 46,192 11,540 28,269 1,100,315 Accumulated impairments — (306 ) (104,700 ) (182,446 ) — (706 ) (28,269 ) (316,427 ) Goodwill 170,974 391,325 152,374 12,189 46,192 10,834 — 783,888 Increase (decrease) due to: Acquisitions — 1,791 13,007 5,156 — — — 19,954 Sales and dispositions — (902 ) (392 ) — — — — (1,294 ) Impairments — — — — — — — — Translation adjustments 1,386 16,609 6,026 267 318 — — 24,606 Other — — 1,467 (1,472 ) — — — (5 ) Balance, March 31, 2021: Goodwill — gross 172,360 409,129 278,991 198,600 46,510 11,540 28,526 1,145,656 Accumulated impairments — (306 ) (106,509 ) (182,460 ) — (706 ) (28,526 ) (318,507 ) Goodwill 172,360 408,823 172,482 16,140 46,510 10,834 — 827,149

Insurance-related accounts

Insurance-related accounts	12 Months Ended
	Mar. 31, 2021
Insurance [Abstract]
Insurance-related accounts	10. Insurance-related accounts Sony’s Financial Services segment subsidiaries in Japan maintain their accounting records as described in Note 2 in accordance with the accounting principles and practices generally accepted in Japan, which vary in some respects from U.S. GAAP. Those differences are mainly that insurance acquisition costs for life and non-life (1) Insurance policies Life insurance policies that subsidiaries in the Financial Services segment underwrite, most of which are categorized as long-duration contracts, mainly consist of whole life, term life and accident and health insurance contracts. The life insurance revenues for the fiscal years ended March 31, 2019, 2020 and 2021 were 910,011 million yen, 1,052,316 million yen and 913,361 million yen, respectively. Property and casualty insurance policies that a subsidiary in the Financial Services segment underwrites are primarily automotive insurance contracts, which are categorized as short-duration contracts. The non-life (2) Deferred insurance acquisition costs Amortization of deferred insurance acquisition costs charged to income for the fiscal years ended March 31, 2019, 2020 and 2021 amounted to 79,906 million yen, 93,734 million yen and 44,738 million yen, respectively. At March 31, 2020 and 2021, the balances of deferred insurance acquisition costs of non-traditional (3) Future insurance policy benefits Liabilities for future insurance policy benefits, except the portion of liabilities for minimum guarantee benefits which is described below, which mainly relate to individual life insurance policies, are established in amounts adequate to meet the estimated future obligations of policies in force. These liabilities, which require significant management judgment and estimates, are computed by the net level premium method based upon the assumptions as to future investment yield, morbidity, mortality, withdrawals and other factors. Future policy benefits are computed using interest rates ranging from 0.5% to 4.5% and are based on factors such as market conditions and expected investment returns. Morbidity, mortality and withdrawal assumptions for all policies are based on either the subsidiary’s own experience or various actuarial tables. Generally these assumptions are locked-in Liabilities for future policy benefits includes the liabilities for the minimum guarantee benefits of variable annuities and variable life insurance contracts. The details regarding the minimum guarantee benefits are presented in (5) below. Sony elected the fair value option for certain of these liabilities for future insurance policy benefits. Refer to Note 13. At March 31, 2020 and 2021, future insurance policy benefits amounted to 6,237,048 million yen and 6,592,763 million yen, respectively. (4) Policyholders’ account in the life insurance business Policyholders’ account in the life insurance business represents an accumulation of account deposits plus credited interest less withdrawals, expenses and mortality charges. Policyholders’ account includes universal life insurance and investment contracts. Universal life insurance includes interest sensitive whole life contracts and variable life insurance contracts. The credited rates associated with interest sensitive whole life contracts range from 1.7% to 2.0%. For variable life insurance contracts, policy values are expressed in terms of investment units. Each unit is linked to an asset portfolio. The value of a unit increases or decreases based on the value of the linked asset portfolio. Investment contracts mainly include single payment endowment contracts, single payment educational endowment contracts, individual variable annuities and policies after the start of annuity payments. The credited rates associated with investment contracts, except for individual variable annuities, range from 0.01% to 6.3%. For individual variable annuities, policy values are expressed in terms of investment units. Each unit is linked to an asset portfolio. The value of a unit increases or decreases based on the value of the linked asset portfolio. The liabilities for policyholders’ account in the life insurance business includes the liabilities related to the variable annuities and variable life insurance contracts with minimum guarantee benefits. Sony elected the fair value option for certain of these liabilities for policyholders’ account in the life insurance business. Refer to Note 13. At March 31, 2020 and 2021, policyholders’ account in the life insurance business is comprised of the following: Yen in millions March 31 2020 2021 Universal life insurance 2,611,577 3,067,791 Investment contracts 885,690 1,103,785 Other 145,004 159,489 Total 3,642,271 4,331,065 (5) Minimum guarantee benefit for variable annuities and variable life insurance contracts Regarding variable annuities and variable life insurance contracts, minimum guarantee benefits (minimum death benefit, minimum accumulation benefit, etc.) are provided, and Sony bears the risk of fulfilling the minimum guarantee benefits prescribed in the contracts to policyholders. The fair value option is applied to the portion of the liability for variable annuity contracts with minimum guarantee benefits. Refer to Note 13. Excluding the portion of the liability measured at fair value, the liability for the minimum guarantee benefit is calculated based on the ratio of the present value of expected total excess payments divided by the present value of expected total assessments over the life of the contract. Mortality rates, lapse rates, discount rates and investment yield are used as significant assumptions for this calculation. The policyholders’ account value, net amount at risk, liability for the minimum guarantee benefit, and average attained age at March 31, 2020 and 2021 are as follows. Yen in millions March 31, 2020 Variable annuities Variable life Total Policyholders’ account value 464,093 1,096,935 1,561,028 Net amount at risk 71,685 4,564,214 4,635,899 Liability for minimum guarantee benefit 64,045 79,860 143,905 Age March 31 2020 Variable annuities Variable life Average attained age 60 45 Yen in millions March 31, 2021 Variable annuities Variable life Total Policyholders’ account value 490,152 1,486,001 1,976,153 Net amount at risk 50,861 5,074,637 5,125,498 Liability for minimum guarantee benefit 42,309 58,246 100,555 Age March 31 2021 Variable annuities Variable life Average attained age 61 45

Short-term borrowings and long-

Short-term borrowings and long-term debt	12 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Short-term borrowings and long-term debt	11. Short-term borrowings and long-term debt Short-term borrowings are comprised of the following: Yen in millions March 31 2020 2021 Unsecured loans: with a weighted-average interest rate of 0.86% 91,725 with a weighted-average interest rate of 0.77% 58,659 Repurchase agreement: with a weighted-average interest rate of 0.93% 567,194 with a weighted-average interest rate of 0.06% 917,792 Call money: with a weighted-average interest rate of 0.13% 151,257 with a weighted-average interest rate of -0.03% 211,417 810,176 1,187,868 At March 31, 2021, certain subsidiaries in the Financial Services segment pledged marketable securities and securities investments with a book value of 787,977 million yen as collateral for 917,792 million yen of short-term repurchase agreements. The repurchase agreement provides for net settlement upon a termination event. At March 31, 2021, certain subsidiaries in the Financial Services segment pledged marketable securities and securities investments with a book value of 68,863 million yen as collateral for 59,500 million yen of secured call money. In addition to the above, at March 31, 2021, certain subsidiaries in the Financial Services segment entered into securities-for-securities lending transactions, pursuant to which they pledged securities investments with a value of million yen as collateral and received marketable securities with a value of million yen as collateral. The amount of this received collateral was recorded in other current liabilities of the consolidated balance sheets for the debt of these transactions. The collateral received is permitted to be sold or repledged as collateral, but was not sold or pledged as of March 31, 2021. Furthermore, certain subsidiaries in the Financial Services segment pledged marketable securities and securities investments with an aggregate book value of Long-term debt is comprised of the following: Yen in millions March 31 2020 2021 Unsecured loans, representing obligations principally to banks: Due 2020 to 2029, with interest rates ranging from 0.01 % to 5.10 % per annum 17,880 Due 2021 to 2030, with interest rates ranging from 0.01 % to 5.10 % per annum 238,196 Unsecured 0.23% bonds, due 2021 89,894 89,969 Unsecured 0.11% bonds, due 2022 10,000 10,000 Unsecured 1.41% bonds, due 2022 10,000 10,000 Unsecured 0.28% bonds, due 2023 15,000 15,000 Unsecured 0.13% bonds, due 2024 29,886 29,911 Unsecured 0.15% bonds, due 2024 9,971 Unsecured 0.22% bonds, due 2025 10,000 10,000 Unsecured 0.18% bonds, due 2026 10,000 10,000 Unsecured 0.20% bonds, due 2026 19,943 Unsecured 0.42% bonds, due 2026 24,923 24,935 Unsecured 0.30% bonds, due 2029 59,738 59,760 Unsecured zero coupon convertible bonds, due 2022: Conversion price 4,996.0 yen per common share 119,531 Conversion price 4,982.5 yen per common share 41,189 Secured 0.00% loans, due 2022 to 2023 201,205 Secured 0.00% loans, due 2021 to 2026 240,019 Finance lease liabilities and other: Due 2020 to 2050, with interest rates ranging from 0.01% to 12.59% per annum 56,350 Due 2021 to 2051, with interest rates ranging from 0.01% to 5.45% per annum 85,564 Guarantee deposits received 10,366 10,536 664,773 904,993 Less — Portion due within one year 29,807 131,699 634,966 773,294 At March 31, 2021, certain subsidiaries in the Financial Services segment pledged marketable securities and securities investments with a book value of 54,624 million yen and housing loans with a book value of 562,731 million yen as collateral for a 240,000 million yen long-term secured loan. On July 21, 2015, Sony issued 120,000 million yen of 130% callable unsecured zero coupon convertible bonds with stock acquisition rights due 2022 (the “Zero Coupon Convertible Bonds”). The bondholders are entitled to stock acquisition rights effective from September 1, 2015 to events yen per common share per fiscal year. The conversion price has been adjusted to yen per common share since May 10, 2021 because the payment of the total annual dividend per common share for the fiscal year ended March 31, 2021 was yen, which is in excess of yen. If each of the closing sales prices per share of Sony Group Corporation’s common stock on the Tokyo Stock Exchange for 20 consecutive trading days is or more of the conversion price of the Zero Coupon Convertible Bonds applicable on those trading days, subject to a public announcement of specified information within 15 days from the last day of those trading days Sony was not required to bifurcate any of the embedded features contained in the Zero Coupon Convertible Bonds for accounting Sony borrowed 322.5 billion yen in July 2020, and 74.0 billion yen in October 2020 from a Japanese private bank, in order to procure the funds necessary to acquire the common shares and the related stock acquisition rights not held by Sony of Sony Financial Holdings Inc. (“SFH”), a consolidated subsidiary of Sony, with the aim of making SFH a wholly-owned subsidiary of Sony. Sony fully repaid the outstanding balance of 396.5 billion yen by the end of March 2021. In July 2020, in order to enhance liquidity, Sony executed an approximate 2 billion U.S. dollar bank loan from a group of lenders with eight ten maturity terms in connection with Sony’s November 2018 acquisition of the remaining approximately equity interest in DH Publishing, L.P., which owns EMI Music Publishing. This bank loan utilizes the Japan Bank for International Cooperation (“JBIC”) Facility, which was established to facilitate overseas mergers and acquisitions by Japanese companies. Approximately There are no significant adverse debt covenants or cross-default provisions related to the other short-term borrowings and long-term debt. Aggregate amounts of annual maturities of long-term debt are as follows: Fiscal year ending March 31 Yen in millions 2022 131,699 2023 106,626 2024 95,016 2025 188,572 2026 26,867 Later fiscal years 356,213 Total 904,993 At March 31, 2021, Sony had unused committed lines of credit amounting to 580,453 million yen and can generally borrow up to 180 days from the banks with whom Sony has committed line contracts. Furthermore, at March 31, 2021, Sony had commercial paper programs totaling 1,053,550 million yen. Sony can issue commercial paper for a period generally not in excess of 270 days up to the size of the programs.

Housing loans and deposits from

Housing loans and deposits from customers in the banking business	12 Months Ended
	Mar. 31, 2021
Banking And Thrifts [Abstract]
Housing loans and deposits from customers in the banking business	12. Housing loans and deposits from customers in the banking business (1) Housing loans in the banking business Sony acquires and holds certain financial receivables in the normal course of business. The majority of financing receivables held by Sony consists of housing loans in the banking business and no other significant financial receivables exist. A subsidiary in the banking business monitors the credit quality of housing loans based on the credit ratings of debtors which are classified by the financial conditions and the past due status of individual obligors. Past due status is monitored on a daily basis and the credit ratings of debtors is reviewed on a quarterly basis. The allowance for the credit losses is established based on the credit ratings of debtors and the evaluation of collateral. The amount of housing loans in the banking business and the corresponding allowance for credit losses as of March 31, 2020 were 1,927,054 million yen and 780 million yen, respectively, and as of March 31, 2021 were 2,354,546 million yen and 1,004 million yen, respectively. During the fiscal years ended March 31, 2020 and 2021, charge-offs on housing loans in the banking business and changes in the allowance for credit losses were not significant. The balance of housing loans placed on nonaccrual status or past due status were not significant as of March 31, 2020 and 2021. The following table presents the amortized cost of housing loans in the banking business by credit quality indicator based on the credit ratings of debtors as of March 31, 2020. Yen in millions March 31, 2020 Housing loans by the credit ratings of debtors: Normal* 1,923,648 Other than normal 3,406 Total 1,927,054 * Normal is defined as borrowers who do not have particular problems with their financial position. The following table presents the amortized cost of housing loans in the banking business by both credit quality indicator based on the credit ratings of debtors and year of origination as of March 31, 2021. Yen in millions March 31, 2021 Amortized Cost by Origination Year Fiscal year ended March 31 2021 2020 2019 2018 2017 Prior Total Housing loans by the credit ratings of debtors: Normal* 547,133 349,334 252,609 158,546 269,450 772,072 2,349,144 Other than normal 212 136 358 265 218 4,213 5,402 Total assets 547,345 349,470 252,967 158,811 269,668 776,285 2,354,546 * Normal is defined as borrowers who do not have particular problems with their financial position. (2) Deposits from customers in the banking business All deposits from customers in the banking business within the Financial Services segment are interest bearing deposits. At March 31, 2020 and 2021, the balances of time deposits and thrift saving deposits issued in amounts of 10 million yen or more were million yen and million yen, respectively. These amounts have been classified as current liabilities mainly due to the ability of the customers to make withdrawals prior to maturity. At March 31, 2021, aggregate amounts of annual maturities of time deposits and thrift saving deposits with a remaining term of more than one year are as follows: Fiscal year ending March 31 Yen in millions 2023 36,586 2024 19,643 2025 3,135 2026 3,159 2027 400 Later fiscal years 28,805 Total 91,728

Fair value measurements

Fair value measurements	12 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair value measurements	13. Fair value measurements As discussed in Note 2, assets and liabilities subject to the accounting guidance for fair value measurements held by Sony are classified and accounted for as described below. (1) Assets and liabilities that are measured at fair value on a recurring basis The following section describes the valuation techniques used by Sony to measure different financial instruments at fair value, including an indication of the level in the fair value hierarchy in which each instrument is generally classified. Debt securities, equity securities, and other investments Where quoted prices are available in an active market, securities are classified in level 1 of the fair value hierarchy. Level 1 securities include exchange-traded equities. If quoted market prices are not available for the specific security or the market is inactive, then fair values are estimated by using pricing models, quoted prices of securities with similar characteristics or discounted cash flows and mainly classified in level 2 of the hierarchy. Level 2 securities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments, such as the majority of government bonds and corporate bonds. In certain cases where there is limited activity or less transparency around inputs to the valuation, securities are classified within level 3 of the fair value hierarchy. Level 3 securities primarily include certain securitized products, certain hybrid financial instruments, certain private equity investments, and certain domestic and foreign corporate bonds not classified within level 1 or level 2. Derivatives Exchange-traded derivatives valued using quoted prices are classified within level 1 of the fair value hierarchy. However, few classes of derivative contracts are listed on an exchange; thus, the majority of Sony’s derivative positions are valued using internally developed models that use as their basis readily observable market parameters – i.e., parameters that are actively quoted and can be validated to external sources, including industry pricing services. Depending on the types and contractual terms of derivatives, fair value can be modeled using a series of techniques, such as the Black-Scholes option pricing model, which are consistently applied. Where derivative products have been established for some time, Sony uses models that are widely accepted in the financial services industry. These models reflect the contractual terms of the derivatives, including the period to maturity, and market-based parameters such as interest rates, volatility, and the credit rating of the counterparty. Further, many of these models do not contain a high level of subjectivity as the techniques used in the models do not require significant judgment, and inputs to the model are readily observable from actively quoted markets. Such instruments are generally classified within level 2 of the fair value hierarchy. In determining the fair value of Sony’s interest rate swap derivatives, Sony uses the present value of expected cash flows based on market observable interest rate yield curves commensurate with the term of each instrument. For foreign currency derivatives, Sony’s approach is to use forward contract and option valuation models employing market observable inputs, such as spot currency rates, time value and option volatilities. These derivatives are classified within level 2 since Sony primarily uses observable inputs in its valuation of its derivative assets and liabilities. Future insurance policy benefits and policyholders’ account in the life insurance business In determining the fair value of future insurance policy benefits and policyholders’ account in the life insurance business to which Sony applies the fair value option, Sony uses the present value of future expected cash flows based on mortality rates, lapse rates, discount rates, investment yield and various actuarial assumptions. These are classified within level 3 since Sony primarily uses unobservable inputs in its valuation. In determining the fair value of liability for the minimum guarantee benefits of variable annuities, Sony uses mortality rates (0.004%~44.865%, weighted average 0.896%), lapse rates (1.000%~7.500%, weighted average 4.312%), and discount rates (-0.046%~3.379%, as significant unobservable inputs. The weighted average rates of mortality and lapse are calculated by weighting the balance of the asset portfolio related to variable annuity contracts to the rates of mortality and lapse at the end of the fiscal year in accordance with the age of each contract, moneyness and other relevant factors. The weighted average discount rates are The fair value of Sony’s assets and liabilities that are measured at fair value on a recurring basis at March , and are as follows. Yen in millions March 31, 2020 Presentation in the consolidated balance sheets Level 1 Level 2 Level 3 Total Marketable Securities Other Other Assets: Debt securities Trading securities 24,330 245,790 — 270,120 270,120 — — — Available-for-sale Japanese national government bonds — 1,761,929 — 1,761,929 10,011 1,751,918 — — Japanese local government bonds — 69,172 — 69,172 15,334 53,838 — — Japanese corporate bonds — 220,679 30 220,709 14,774 205,935 — — Foreign government bonds *1 — 279,777 — 279,777 2,690 277,087 — — Foreign corporate bonds *2 — 343,980 15,770 359,750 94,156 265,594 — — Securitized products *3 — 33,383 171,840 205,223 — 205,223 — — Other — 4,152 12,101 16,253 — 16,253 — — Equity securities 950,744 581,642 — 1,532,386 1,434,612 97,774 — — Other investments *4 7,162 816 9,242 17,220 — 17,220 — — Derivative assets *5 1,310 41,073 — 42,383 — — 40,784 1,599 Total assets 983,546 3,582,393 208,983 4,774,922 1,841,697 2,890,842 40,784 1,599 Presentation in the consolidated balance sheets Level 1 Level 2 Level 3 Total Future Policyholders’ Other Other Liabilities: Future insurance policy benefits and policyholders’ account in the life insurance business *6 — — 532,191 532,191 64,045 468,146 — — Derivative liabilities *5 2,077 33,789 — 35,866 — — 16,814 19,052 Total liabilities 2,077 33,789 532,191 568,057 64,045 468,146 16,814 19,052 Yen in millions March 31, 2021 Presentation in the consolidated balance sheets Level 1 Level 2 Level 3 Total Marketable Securities Other Other Assets: Debt securities Trading securities 30,164 258,731 — 288,895 288,895 — — — Available-for-sale Japanese national government bonds — 2,443,266 — 2,443,266 394,295 2,048,971 — — Japanese local government bonds — 74,063 — 74,063 29,624 44,439 — — Japanese corporate bonds — 264,644 7,169 271,813 24,980 246,833 — — Foreign government bonds *1 — 325,856 — 325,856 — 325,856 — — Foreign corporate bonds *2 — 365,029 17,845 382,874 117,209 265,665 — — Securitized products *3 — 44,104 154,489 198,593 — 198,593 — — Other — 21,466 24,355 45,821 — 45,821 — — Equity securities 1,757,134 704,214 — 2,461,348 2,044,763 416,585 — — Other investments *4 7,544 4,128 9,326 20,998 — 20,998 — — Derivative assets *5 261 28,476 — 28,737 — — 14,412 14,325 Total assets 1,795,103 4,533,977 213,184 6,542,264 2,899,766 3,613,761 14,412 14,325 Presentation in the consolidated balance sheets Level 1 Level 2 Level 3 Total Future Policyholders’ Other Other Liabilities: Future insurance policy benefits and policyholders’ account in the life insurance business *6 — — 536,189 536,189 42,309 493,880 — — Derivative liabilities *5 1,116 39,238 — 40,354 — — 26,086 14,268 Total liabilities 1,116 39,238 536,189 576,543 42,309 493,880 26,086 14,268 *1 7,771 million yen and 15,654 million yen are included in foreign securities for which the fair value option has been elected and classified in level 2 for the fiscal years ended March 31, 2020 and 2021. In the consolidated balance sheets, 2,386 million yen are included as marketable securities for the fiscal years ended March 31, 2020 and 5,385 million yen and 15,654 million yen are included as securities investment and other for the fiscal years ended March 31, 2020 and 2021, respectively. *2 188,426 million yen and 228,761 million yen are included in foreign securities for which the fair value option has been elected and classified in level 2 for the fiscal years ended March 31, 2020 and 2021, respectively. In the consolidated balance sheets, 34,502 million yen and 52,637 million yen are included as marketable securities and 153,924 million yen and 176,124 million yen are included as securities investment and other for the fiscal years ended March 31, 2020 and 2021, respectively. *3 193,430 million yen and 192,451 million yen are included in foreign securities for which the fair value option has been elected and classified in level 2 and level 3 for the fiscal years ended March 31, 2020 and 2021, respectively, and are included in the consolidated balance sheets as securities investments and other. *4 Other investments include certain hybrid financial instruments and certain private equity investments. *5 Derivative assets and liabilities are recognized and disclosed on a gross basis. *6 Future insurance policy benefits and policyholders’ account in the life insurance business are those for which the fair value option has been elected. 7 Net loss of 12,408 million yen and net gains of 4,645 million yen arising from assets and liabilities for which the fair value option has been elected are included in financial services revenue and financial services expense in the consolidated statements of income for the fiscal years ended March 31, 2020 and 2021, respectively. The changes in fair value of level 3 assets and liabilities for the fiscal years ended March 31, 2020 and 2021 are as follows: Yen in millions Fiscal year ended March 31, 2020 Assets Liabilities Debt securities Future Available-for-sale Japanese Foreign Securitized Other Other Beginning balance — 22,704 165,083 — 6,918 — Acquisition of AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd. *1 — — — — — 547,190 Total realized and unrealized gains (losses): Included in earnings (loss) *2 — 311 (18,151 ) — (500 ) 12,500 Included in other comprehensive income (loss) *3 — (73 ) 1 — — 3,032 Purchases and Issuances 30 13,597 40,175 12,101 4,711 5,295 Sales — — — — (9 ) — Settlements — (20,867 ) (12,967 ) — (1,878 ) (4,762 ) Transfers into level 3 *4 — 3,374 — — — — Transfers out of level 3 *5 — (3,276 ) (2,301 ) — — — Ending balance 30 15,770 171,840 12,101 9,242 532,191 Changes in unrealized gains (losses) relating to instruments still held at reporting date: Included in earnings (loss) *2 — (94 ) (16,507 ) — (376 ) 10,273 Yen in millions Fiscal year ended March 31, 2021 Assets Liabilities Debt securities Future Available-for-sale Japanese Foreign Securitized Other Other Beginning balance 30 15,770 171,840 12,101 9,242 532,191 Total realized and unrealized gains (losses): Included in earnings (loss)* 2 — 1,465 14,000 5,703 772 (16,475 ) Included in other comprehensive income (loss)* 3 (461 ) 73 — (11 ) — (3,120 ) Purchases and Issuances 7,600 5,441 — 11,215 28 1,996 Sales — — — — (2 ) — Settlements — (7,835 ) (34,488 ) (4,681 ) (825 ) (17,593 ) Other — (1,613 ) 1,014 28 111 Transfers into level 3* 4 — 4,544 2,123 — — — Ending balance 7,169 17,845 154,489 24,355 9,326 536,189 Changes in unrealized gains (losses) Included in earnings (loss)* 2 — 600 17,419 — (77 ) (29,205 ) Included in other comprehensive income (loss)* 3 (461 ) 14 — (17 ) — (3,120 ) *1 Refer to Note 24. *2 Earning effects are included in financial services revenue and financial services expense in the consolidated statements of income. *3 Unrealized gains (losses) are included in unrealized gains (losses) on securities, net for available-for-sale *4 Certain corporate bonds and certain securitized products were transferred into level 3 because differences between the fair value determined by indicative quotes from dealers and the fair value determined by internally developed prices became significant and the observability of the inputs used decreased. *5 Certain corporate bonds and certain securitized products were transferred out of level 3 because observable market data became available. Level 3 assets include certain securitized products, certain private equity investments, and certain domestic and foreign corporate bonds for which quoted prices are not available in a market and where there is less transparency around inputs. In determining the fair value of such assets, Sony uses third-party information such as indicative quotes from dealers without adjustment. Level 3 liabilities include future insurance policy benefits and policyholders’ account in the life insurance business whose underlying figures are unobservable, and whose fair value is calculated in-house. (2) Assets and liabilities that are measured at fair value on a nonrecurring basis Sony also has assets and liabilities that are required to be remeasured to fair value on a nonrecurring basis when certain circumstances occur. During the fiscal years ended March 31, 2020 and 2021, such remeasurements to fair value related primarily to the following: During the fiscal year ended March 31, 2020 Estimated fair value Amounts included Level 1 Level 2 Level 3 Assets: Remeasurement of retained investment in SRE 15,911 — — 13,347 Long-lived assets impairments — — 8,155 (36,003 ) (22,656 ) During the fiscal year ended March 31, 2021 Estimated fair value Amounts included Level 1 Level 2 Level 3 Assets: Long-lived assets impairments — — 32,033 (25,685 ) (25,685 ) Long-lived assets impairments Sony recorded an impairment loss of 19,172 million yen and 12,714 million yen for the fiscal years ended March 31, 2019 and 2020, respectively, included within the EP&S segment, related to long-lived a Sony recorded an impairment loss of 12,858 million yen for the fiscal year ended March 31, 2019, included within All Other, related to long-lived assets and goodwill in the storage media business asset group. As a result of conducting a strategic review of the business and evolving market trends, Sony reduced the corresponding estimated future cash flows of this business and the estimated ability to recover the entire carrying amount of the long-lived assets and goodwill within the period applicable to the impairment determination, resulting in an impairment charge for the fiscal year ended March 31, 2019. These measurements are classified as level 3 because significant unobservable inputs, such as the condition of the assets or projections of future cash flows, the timing of such cash flows and the discount rate reflecting the risk inherent in future cash flows, were considered in the fair value measurements. For the fiscal year ended March 31, 2019, a discount rate of 8.5% and projected revenue growth rates ranging from (26)% to 24% were used in the fair value measurements related to the long-lived assets for the smartphone business. For the fiscal year ended March 31, 2020, a discount rate of 10.6% and projected revenue growth rates ranging from (10)% to 70% were used in the fair value measurements related to the long-lived assets for the smartphone business. For the fiscal year ended March 31, 2019, a discount rate of 8.9% and projected revenue growth rates ranging from (34)% to 21% were used in the fair value measurements related to the long-lived assets and goodwill for the storage media business. Except as described above, no other impairment losses were individually material for the fiscal year ended March 31, 2020. The other impairment losses were primarily related to the impairment losses in asset groups within Media Networks in the Pictures segment related to a review of the channel portfolio for the fiscal year ended March 31, 2020. There was no individually material impairment loss for the fiscal year ended March 31, 2021. Remeasurement of retained investment in SRE During the fiscal year ended March 31, 2020, Sony sold part of its shares in SRE and remeasured the remaining shares to fair value. This measurement is classified as level 1 because a quoted price for the shares of SRE is available on the Tokyo Stock Exchange. Refer to Note 5. Remeasurement of previously owned equity interest in AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd. During the fiscal year ended March 31, 2020, Sony remeasured to fair value the previously owned equity interests in AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd. (collectively, the “JVs”) in connection with acquisition of the JVs. The measurement is classified as level 3 because significant unobservable inputs, such as projections of future cash flows and market comparables of similar transactions and companies, were considered in the fair value measurements. AEGON Sony Life Insurance Co., Ltd. changed its name to “Sony Life With Insurance Co., Ltd.,” as of April 1, 2020, and Sony Life With Insurance Co., Ltd., was subsequently merged with Sony Life as of April 1, 2021. Refer to Note 24. (3) Financial instruments The estimated fair values by fair value hierarchy level of certain financial instruments that are not reported at fair value are summarized as follows: Yen in millions March 31, 2020 Estimated fair value Carrying Level 1 Level 2 Level 3 Total Total Assets: Housing loans in the banking business — 2,161,432 — 2,161,432 1,927,054 Total assets — 2,161,432 — 2,161,432 1,927,054 Liabilities: Long-term debt including the current portion — 699,358 — 699,358 664,773 Investment contracts included in policyholders’ account in the life insurance business — 969,464 — 969,464 885,690 Total liabilities — 1,668,822 — 1,668,822 1,550,463 Yen in millions March 31, 2021 Estimated fair value Carrying Level 1 Level 2 Level 3 Total Total Assets: Housing loans in the banking business — — 2,559,073 2,559,073 2,354,546 Total assets — — 2,559,073 2,559,073 2,354,546 Liabilities: Long-term debt including the current portion — 911,885 39,989 951,874 904,993 Investment contracts included in policyholders’ account in the life insurance business — 1,159,195 — 1,159,195 1,103,785 Total liabilities — 2,071,080 39,989 2,111,069 2,008,778 The summary excludes cash and cash equivalents, call loans, time deposits, notes and accounts receivable, trade, call money, short-term borrowings, notes and accounts payable, trade and deposits from customers in the banking business because the carrying values of these financial instruments approximated their fair values due to their short-term nature. The summary also excludes held-to-maturity Cash and cash equivalents, call loans and call money are classified in level 1. Time deposits, short-term borrowings, deposits from customers in the banking business are classified in level 2. Held-to-maturity .

Derivative instruments and hedg

Derivative instruments and hedging activities	12 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative instruments and hedging activities	14. Derivative instruments and hedging activities Sony has certain financial instruments including financial assets and liabilities acquired in the normal course of business. Such financial instruments are exposed to market risk arising from the changes in foreign currency exchange rates and interest rates. In applying a consistent risk management strategy for the purpose of reducing such risk, Sony uses derivative financial instruments, which include foreign exchange forward contracts, foreign currency option contracts, and interest rate swap agreements (including interest rate and currency swap agreements). Certain other derivative financial instruments are entered into in the Financial Services segment for asset-liability management (“ALM”) purposes. These instruments are executed with creditworthy financial institutions, and virtually all foreign currency contracts are denominated in U.S. dollars, euros and other currencies of major countries. These derivatives generally mature or expire within six months after the balance sheet date. Other than derivatives utilized in the Financial Services segment for ALM, Sony does not use derivative financial instruments for trading or speculative purposes. These derivative transactions utilized for ALM in the Financial Services segment are executed within certain limits in accordance with an internal risk management policy. Derivative financial instruments held by Sony are classified and accounted for as described below. Fair value hedges Both the derivatives designated as fair value hedges and the hedged items are reflected at fair value in the consolidated balance sheets. Changes in the fair value of the derivatives designated as fair value hedges, as well as offsetting changes in the carrying value of the underlying hedged items, are recognized in income. For the fiscal years ended March 31, 2019, 2020 and 2021, there were no amounts excluded from the assessment of hedge effectiveness of fair value hedges. Cash flow hedges Changes in the fair value of derivatives designated as cash flow hedges are initially recorded in other comprehensive income (“OCI”) and reclassified into earnings when the hedged transaction affects earnings. The time value component of the fair value of option contracts is excluded from the assessment of hedge effectiveness and recognized in earnings on a straight-line basis over the life of the hedging instruments. Any difference between the change in fair value of the excluded component and the accumulated amount recognized in earnings on a straight-line basis is recognized in OCI. Derivatives not designated as hedges Changes in the fair value of derivatives not designated as hedges are recognized in income. A description of the purpose and classification of the derivative financial instruments held by Sony is as follows: Foreign exchange forward contracts and foreign currency option contracts Foreign exchange forward contracts and purchased and written foreign currency option contracts are utilized primarily to limit the exposure affected by changes in foreign currency exchange rates on cash flows generated or anticipated by Sony’s transactions and accounts receivable and payable denominated in foreign currencies. The majority of written foreign currency option contracts are a part of range forward contract arrangements and expire in the same month with the corresponding purchased foreign currency option contracts. Sony also entered into foreign exchange forward contracts and foreign exchange range forward contracts which effectively fixed the cash flows from certain forecasted purchase and sale transactions denominated in foreign currencies for the fiscal years ended March 31, 2019, 2020 and 2021. Accordingly, these derivatives have been designated as cash flow hedges. Foreign exchange forward contracts and foreign currency option contracts that do not qualify as hedges are marked-to-market Foreign exchange forward contracts, foreign currency option contracts and currency swap agreements held by certain subsidiaries in the Financial Services segment are marked-to-market Interest rate swap agreements (including interest rate and currency swap agreements Interest rate swap agreements are utilized primarily to lower funding costs, to diversify sources of funding and to limit Sony’s exposure associated with underlying borrowings and available-for-sale Interest rate swap agreements entered into in the Financial Services segment are used for reducing the risk arising from the changes in the fair value of fixed rate available-for-sale available-for-sale Certain subsidiaries in the Financial Services segment have interest rate swap agreements as part of their ALM, which are marked-to-market Any other interest rate swap agreements that do not qualify as hedges, which are used for reducing the risk arising from changes of variable rate debt, are marked-to-market Other agreements Certain subsidiaries in the Financial Services segment have equity future contracts, equity swap agreements, bond future contracts, commodity future contracts, interest rate swaption agreements, other currency contracts and hybrid financial instruments as part of their ALM, which are marked-to-market The estimated fair values of Sony’s outstanding derivative instruments are summarized as follows: Derivatives designated as hedging Yen in millions Balance sheet location Fair value Balance sheet location Fair value March 31 March 31 Asset derivatives 2020 2021 Liability derivatives 2020 2021 Interest rate contracts Prepaid expenses and other current assets 9 — Current liabilities: Other 183 286 Interest rate contracts Other assets: Other 27 10,921 Liabilities: Other 8,177 6,064 Foreign exchange contracts Prepaid expenses and other current assets 1,799 8 Current liabilities: Other — 6,000 1,835 10,929 8,360 12,350 Derivatives not designated as Yen in millions Balance sheet location Fair value Balance sheet location Fair value March 31 March 31 Asset derivatives 2020 2021 Liability derivatives 2020 2021 Interest rate contracts Prepaid expenses and other current assets 44 50 Current liabilities: Other 200 408 Interest rate contracts Other assets: Other 1,523 1,817 Liabilities: Other 9,120 8,204 Foreign exchange contracts Prepaid expenses and other current assets 19,655 14,097 Current liabilities: Other 14,580 14,233 Foreign exchange contracts Other assets: Other 49 1,587 Liabilities: Other 1,755 — Equity contracts Prepaid expenses and other current assets 18,886 240 Current liabilities: Other 1,476 5,157 Bond contracts Prepaid expenses and other current assets 306 17 Current liabilities: Other 290 2 Commodity contracts Prepaid expenses and other current assets 85 — Current liabilities: Other 85 0 40,548 17,808 27,506 28,004 Total derivatives 42,383 28,737 35,866 40,354 Presented below are the effects of derivative instruments on the consolidated statements of income and the consolidated statements of comprehensive income for the fiscal years ended March 31, 2019, 2020 and 2021. Derivatives under fair value hedging relationships Yen in millions Location of gains or (losses) recognized Amounts of gains or (losses) recognized Fiscal year ended March 31 2019 2020 2021 Interest rate contracts Financial services revenue (1,835 ) (3,925 ) (1,189 ) Total (1,835 ) (3,925 ) (1,189 ) Yen in millions Derivatives under cash flow hedging relationships Fiscal year ended March 31 2019 2020 2021 Amounts recognized in unrealized gains (losses) on derivative Interest rate contracts: Components included in — — 10,153 Foreign exchange contracts: Components included in 2,315 1,712 (2,210 ) Components excluded from — 1,087 263 Total 2,315 2,799 8,206 Yen in millions Derivatives under cash flow hedging relationships Affected line item in consolidated statements of income Fiscal year ended March 31 2019 2020 2021 Amounts reclassified from unrealized Interest rate contracts: Components included in Interest — — 285 Foreign exchange contracts: — Components included in Cost of sales (1,093 ) — — Components included in Net sales — 106 (5,382 ) Components excluded from Net sales — (1,087 ) (263 ) Total (1,093 ) (981 ) (5,360 ) Derivatives not designated as Yen in millions Location of gains or (losses) recognized Amounts of gains or (losses) recognized Fiscal year ended March 31 2019 2020 2021 Interest rate contracts Financial services revenue (3,192 ) 1,190 (9,603 ) Foreign exchange contracts Financial services revenue (8,198 ) 2,473 (10,730 ) Foreign exchange contracts Foreign exchange loss, net (7,437 ) 10,184 (8,454 ) Equity contracts Financial services revenue (7,649 ) 15,438 (85,118 ) Bond contracts Financial services revenue — (2,954 ) 99 Commodity contracts Financial services revenue — 110 4,790 Total (26,476 ) 26,441 (109,016 ) Presented below are the amortized cost of hedged items, which are available-for-sale Derivatives under fair value hedging relationships Yen in millions Balance sheet location of March 31, 2020 Amortized cost Cumulative effect to carrying amount of hedged items by fair value hedges Interest rate contracts Marketable securities 15,255 — Interest rate contracts Securities investments and other 91,080 — Total 106,335 — Derivatives under fair value hedging relationships Yen in millions Balance sheet location of March 31, 2021 Amortized cost Cumulative effect to carrying amount of hedged items by fair value hedges Interest rate contracts Marketable securities 30,167 — Interest rate contracts Securities investments and other 74,872 — Total 105,039 — The following table summarizes additional information, including notional amounts, for each type of derivative: Yen in millions March 31, 2020 March 31, 2021 Notional Fair value Notional Fair value Foreign exchange contracts: Foreign exchange forward contracts* 989,966 3,201 1,176,589 (5,420 ) Currency option contracts purchased 473 7 36,234 15 Currency option contracts written 460 (5 ) 36,164 (1,790 ) Currency swap agreements 893,874 (1,006 ) 612,813 490 Other currency contracts* 62,080 2,971 68,663 2,164 Interest rate contracts: Interest rate swap agreements 994,133 (16,019 ) 979,554 (1,969 ) Interest rate swaption agreements 18,700 (58 ) 38,700 (205 ) Equity contracts: Equity future contracts 63,354 (871 ) 129,526 (746 ) Equity swap agreements 103,409 18,281 117,055 (4,171 ) Bond contracts: Bond future contracts 56,546 16 169,441 15 Commodity contracts: Commodity future contracts 1,465 0 2,957 (0 ) * Revision has been made to correct the notional amount of foreign exchange forward contracts and the presentation of fair values of foreign exchange forward contracts and other currency contracts as of March 31, 2020. All derivatives are recognized as either assets or liabilities in the consolidated balance sheets on a gross basis, but certain subsidiaries have entered into master netting agreements or other similar agreements, which are mainly International Swaps and Derivatives Association (ISDA) Master Agreements. An ISDA Master Agreement is an agreement between two counterparties that may have multiple derivative contracts with each other, and such ISDA Master Agreement may provide for the net settlement of all or a specified group of these derivative contracts, through a single payment, in a single currency, in the event of a default on or affecting any one derivative contract, or a termination event affecting all or a specified group of derivative contracts. Yen in millions As of March 31, 2020 Gross amounts Gross amounts not offset in the Financial Cash collateral Net amounts Derivative assets subject to master netting agreements 38,281 12,614 20,545 5,122 Derivative assets not subject to master netting agreements 4,102 4,102 Total assets 42,383 12,614 20,545 9,224 Derivative liabilities subject to master netting agreements 31,896 7,086 23,873 937 Derivative liabilities not subject to master netting agreements 3,970 3,970 Repurchase, securities lending and similar arrangements 567,194 564,874 — 2,320 Total liabilities 603,060 571,960 23,873 7,227 Yen in millions As of March 31, 2021 Gross amounts Gross amounts not offset in the Financial Cash collateral Net amounts Derivative assets subject to master netting agreements 15,159 10,666 2,008 2,485 Derivative assets not subject to master netting agreements 13,578 13,578 Securities borrowing and securities lending transactions 326,156 326,156 — Total assets 354,893 336,822 2,008 16,063 Derivative liabilities subject to master netting agreements 38,966 11,052 16,225 11,689 Derivative liabilities not subject to master netting agreements 1,388 1,388 Repurchase, securities lending and similar arrangements 917,792 911,881 — 5,911 Total liabilities 958,146 922,933 16,225 18,988

Pension and severance plans

Pension and severance plans	12 Months Ended
	Mar. 31, 2021
Retirement Benefits [Abstract]
Pension and severance plans	15. Pension and severance plans (1) Defined benefit and severance plans Upon terminating employment, employees of Sony Group Corporation and its subsidiaries in Japan are entitled, under most circumstances, to lump-sum Under the plans, in general, the defined benefits cover 65% of the indemnities under existing regulations to employees. The remaining indemnities are covered by severance payments b lump-sum From April 1, 2012, Sony Group Corporation and substantially all of its subsidiaries in Japan have modified existing defined benefit pension plans such that life annuities will no longer accrue additional service benefits, with those participants instead accruing fixed-term annuities. The defined benefit pension plans were closed to new participants and a defined contribution plan was also introduced. From October 1, 2019, Sony Group Corporation and substantially all of its subsidiaries in Japan have amended their defined benefit pension plans and have implemented defined contribution plans for all employees other than those employees that had retired before the amendments. As a result, accrued pension and severance costs decreased 74,872 million yen and accumulated other comprehensive income increased 81,230 million yen in the consolidated balance sheets as of the fiscal year ended March 31, 2020. In addition, a loss on the pension plan amendment of 6,358 million yen was recorded in other expenses in the consolidated statements of income for the fiscal year ended March 31, 2020. In addition, several of Sony’s foreign subsidiaries have defined benefit pension plans or severance indemnity plans, which cover substantially all of their employees. Under such plans, the related cost of benefits is currently funded or accrued. Benefits awarded under these plans are based primarily on the current rate of pay and length of service. The components of net periodic benefit costs for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Japanese plans: Yen in millions Fiscal year ended March 31 2019 2020 2021 Service cost 23,128 17,948 12,763 Interest cost 7,020 4,162 3,684 Expected return on plan assets (16,695 ) (17,040 ) (10,802 ) Recognized actuarial loss 15,365 12,969 8,852 Amortization of prior service costs (7,864 ) (4,294 ) (343 ) Losses on curtailments and settlements — 6,358 — Net periodic benefit costs 20,954 20,103 14,154 Foreign plans: Yen in millions Fiscal year ended March 31 2019 2020 2021 Service cost 2,780 3,616 2,767 Interest cost 10,083 9,212 6,509 Expected return on plan assets (11,797 ) (10,916 ) (6,395 ) Recognized actuarial loss 2,656 2,606 3,614 Amortization of prior service costs (269 ) 2 1,058 Losses on curtailments and settlements 1,804 68 2,128 Net periodic benefit costs 5,257 4,588 9,681 The changes in the benefit obligation and plan assets as well as the funded status and composition of amounts recognized in the consolidated balance sheets were as follows: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Change in benefit obligation: Benefit obligation at beginning of the fiscal year 1,034,954 658,863 351,918 359,811 Service cost 17,948 12,763 3,616 2,767 Interest cost 4,162 3,684 9,212 6,509 Plan participants’ contributions — — 487 269 Plan amendments — — 10,210 157 Actuarial (gain) loss (3,330 ) 271 19,776 32,432 Foreign currency exchange rate changes — — (16,919 ) 29,486 Curtailments and settlements (359,205 ) — (4,434 ) (14,587 ) Other 2 43 — — Benefits paid (35,668 ) (35,563 ) (14,055 ) (18,555 ) Benefit obligation at end of the fiscal year 658,863 640,061 359,811 398,289 Change in plan assets: Fair value of plan assets at beginning of the fiscal year 742,204 437,206 274,749 281,110 Actual return on plan assets 2,942 59,536 26,738 (596 ) Foreign currency exchange rate changes — — (14,904 ) 25,433 Employer contribution 7,453 2,333 9,916 38,169 Plan participants’ contributions — — 487 269 Curtailments and settlements (284,333 ) — (3,146 ) (11,927 ) Benefits paid (31,060 ) (22,664 ) (12,730 ) (16,967 ) Fair value of plan assets at end of the fiscal year 437,206 476,411 281,110 315,491 Funded status at end of the fiscal year (221,657 ) (163,650 ) (78,701 ) (82,798 ) Amounts recognized in the consolidated balance sheets consist of: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Noncurrent assets 3,391 5,746 24,777 13,660 Current liabilities — — (4,355 ) (12,364 ) Noncurrent liabilities (225,048 ) (169,396 ) (99,123 ) (84,094 ) Ending balance (221,657 ) (163,650 ) (78,701 ) (82,798 ) Amounts recognized in accumulated other comprehensive income, excluding tax effects, consist of: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Prior service cost (credit) (369 ) (26 ) 10,058 9,350 Net actuarial loss 223,354 163,401 66,326 102,821 Ending balance 222,985 163,375 76,384 112,171 The accumulated benefit obligations for all defined benefit pension plans were as follows: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Accumulated benefit obligations 654,209 635,285 354,100 392,375 The accumulated benefit obligations and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets were as follows: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Accumulated benefit obligations 640,890 621,296 226,080 200,020 Fair value of plan assets 420,497 456,662 130,955 109,468 The projected benefit obligations and fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets were as follows: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Projected benefit obligations 645,544 626,057 234,652 205,915 Fair value of plan assets 420,497 456,662 131,546 109,468 Weighted-average assumptions used to determine benefit obligations as of March 31, 2020 and 2021 were as follows: Japanese plans Foreign plans March 31 March 31 2020 2021 2020 2021 Discount rate 0.6 % 0.6 % 2.0 % 1.4 % Interest crediting rate 3.4 3.4 4.8 4.8 Rate of compensation increase * * 2.2 2.5 * Substantially all of Sony’s Japanese pension plans were point-based. Point-based plans do not incorporate a measure of compensation rate increases. Weighted-average assumptions used to determine the net periodic benefit costs for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Japanese plans Foreign plans Fiscal year ended March 31 Fiscal year ended March 31 2019 2020 2021 2019 2020 2021 Discount rate 0.8 % 0.6 % 0.6 % 2.9 % 2.8 % 2.0 % Expected return on plan assets 2.6 2.6 2.5 4.4 4.2 2.3 Interest crediting rate 3.5 3.5 3.4 4.8 4.8 4.8 Rate of compensation increase * * * 2.6 2.3 2.2 * Substantially all of Sony’s Japanese pension plans were point-based. Point-based plans do not incorporate a measure of compensation rate increases. Sony reviews these assumptions for changes in circumstances. The weighted-average rate of compensation increase is calculated based only on the pay-related The mortality rate assumptions are based on life expectancy and death rates for different types of participants. To determine the expected long-term rate of return on pension plan assets, Sony considers the current and expected asset allocations, as well as the historical and expected long-term rates of returns on various categories of plan assets. Sony’s pension investment policy recognizes the expected growth and the variability risk associated with the long-term nature of pension liabilities, the returns and risks of diversification across asset classes, and the correlation a The investment objectives of Sony’s plan assets are designed to generate returns that will enable the plans to meet their future obligations. The precise amount for which these obligations will be settled depends on future events, including the retirement dates and life expectancy of the plans’ participants. The obligations are estimated using actuarial assumptions, based on the current economic environment and other pertinent factors. Sony’s investment strategy balances the requirement to generate returns, using potentially higher yielding assets such as equity securities, with the need to control risk in the portfolio with less volatile assets, such as fixed-income securities. Risks include, among others, inflation, volatility in equity values and changes in interest rates that could negatively impact the funding level of the plans, thereby increasing their dependence on contributions from Sony. To mitigate any potential concentration risk, thorough consideration is given to balancing the portfolio among industry sectors and geographies, taking into account interest rate sensitivity, dependence on economic growth, currency and other factors that affect investment returns. The target allocations as of March 31, 2021, are, as a result of Sony’s asset liability management, 20% of equity securities, 51% of fixed income securities and 29% of other investments for the pension plans of Sony Group Corporation and most of its subsidiaries in Japan, and, on a weighted average basis, 6% of equity securities, 29% of fixed income securities and 65% of other investments for the pension plans of foreign subsidiaries. The fair values of the assets held by Japanese and foreign plans, which are classified in accordance with the fair value hierarchy described in Note 2, are as follows: Japanese plans Yen in millions Fair value at March 31, 2020 Fair value measurements using inputs considered as Asset class Level 1 Level 2 Level 3 Cash and cash equivalents 24,851 24,851 — — Equity: Equity securities *1 50,646 47,308 3,338 — Fixed income: Government bonds *2 107,478 1,087 106,391 — Corporate bonds *3 71,192 20 71,172 — Asset-backed securities *4 1,090 — 1,090 — Commingled funds *5 58,740 — 58,740 — Commodity funds *6 21,823 — 21,823 — Private equity *7 30,191 — — 30,191 Hedge funds *8 48,410 — — 48,410 Real estate and other *9 22,785 — (2,586 ) 25,371 Total 437,206 73,266 259,968 103,972 Japanese plans Yen in millions Fair value at March 31, 2021 Fair value measurements using inputs considered as Asset class Level 1 Level 2 Level 3 Cash and cash equivalents 53,298 53,298 — — Equity: Equity securities *1 63,927 59,946 3,981 — Fixed income: Government bonds *2 116,687 1,149 115,538 — Corporate bonds *3 30,348 19 30,329 — Asset-backed securities *4 1,029 — 1,029 — Commingled funds *5 89,281 — 89,281 — Commodity funds *6 22,283 — 22,283 — Private equity *7 29,153 — — 29,153 Hedge funds *8 47,384 — — 47,384 Real estate and other *9 23,021 — (2,488 ) 25,509 Tota l 476,411 114,412 259,953 102,046 *1 Includes approximately 37 42 63 58 *2 Includes approximately 36 64 *3 Includes debt securities issued by Japanese and foreign corporation and government related agencies. *4 Includes primarily mortgage-backed securities. *5 Commingled funds represent pooled institutional investments, including primarily investment trusts. They include approximately 50 54 45 43 5 3 *6 Represents commodity futures funds. *7 Includes multiple private equity funds of funds that primarily invest in venture, buyout, and distressed markets in the United States and Europe. *8 Includes primarily funds that invest in a portfolio of a broad range of hedge funds to diversify the risks and reduce the volatilities associated with a single hedge fund. *9 Includes primarily private real estate investment trusts. Foreign plans Yen in millions Fair value at March 31, 2020 Fair value measurements using inputs considered as Asset class Level 1 Level 2 Level 3 Cash and cash equivalents 4,632 4,632 — — Equity: Equity securities *1 18,380 17,762 618 — Fixed income: Government bonds *2 93,826 — 93,826 — Corporate bonds *3 31,769 — 31,769 — Asset-backed securities 1,320 — 1,320 — Insurance contracts *4 19,334 — 7,156 12,178 Commingled funds *5 78,280 — 78,280 — Real estate and other *6 33,569 — 11,272 22,297 Total 281,110 22,394 224,241 34,475 Foreign plans Yen in millions Fair value at March 31, 2021 Fair value measurements using inputs considered as Asset class Level 1 Level 2 Level 3 Cash and cash equivalents 5,914 5,914 — — Equity: Equity securities *1 11,349 10,631 718 — Fixed income: Government bonds *2 18,843 — 18,843 — Corporate bonds *3 59,071 — 59,071 — Asset-backed securities 120 — 120 — Insurance contracts *4 156,567 — 7,480 149,087 Commingled funds *5 59,867 — 59,867 — Other 3,760 — 69 3,691 Total 315,491 16,545 146,168 152,778 *1 Includes primarily foreign equity securities. *2 Includes primarily foreign government debt securities. *3 Includes primarily foreign corporate debt securities. *4 Includes annuity contracts with or without profit sharing and bulk insurance contracts. *5 Commingled funds represent pooled institutional investments including mutual funds, common trust funds, and collective investment funds. They are primarily comprised of foreign equities and fixed income investments. *6 Includes primarily private real estate investment trusts. Each level in the fair value hierarchy, in which each plan asset is classified, is determined based on inputs used to measure the fair values of the asset, and does not necessarily indicate the risks or rating of the asset. The following is a description of the valuation techniques used to measure Japanese and foreign plan assets at fair value. The valuation techniques are applied consistently from period to period. Equity securities are valued at the closing price reported in the active market in which the individual securities are traded. These assets are generally classified as level 1. The fair value of fixed income s The fair value of annuity contracts with or without profit sharing is estimated using the valuation techniques for fixed income securities explained above. These assets are generally classified as level 2. Bulk insurance contracts are valued based on actuarial estimates of the market price of the contracts, whose underlying figures are unobservable. These assets are generally classified as level 3. Commingled funds are typically measured using the valuation provided by the administrator of the fund and reviewed by Sony. The valuation is based on Sony’s interest in the value of the underlying assets owned by the fund minus liabilities. These assets are classified as level 1, level 2 or level 3 depending on availability of quoted market prices. Commodity funds are valued using inputs that are derived principally from or corroborated by observable market data. These assets are generally classified as level 2. Private equity and private real estate investment trust valuations require significant judgment due to the absence of quoted market prices, the inherent lack of liquidity and the long-term nature of such assets. These assets are initially valued at cost and are reviewed periodically utilizing available and relevant market data to determine if the carrying value of these assets should be adjusted. These investments are classified as level 3. Hedge funds are measured using the valuation provided by the administrator or custodian of the fund and reviewed by Sony. The valuation is based on Sony’s interest in the value of the underlying assets owned by the fund minus liabilities. These investments are classified as level 3. The following table sets forth a summary of changes in the fair values of Japanese and foreign plans’ level 3 assets for the fiscal years ended March 31, 2020 and 2021 : Japanese plans Yen in millions Fair value measurement using significant unobservable inputs Private equity Hedge funds Real estate and other Total Beginning balance at April 1, 2019 27,956 71,606 21,392 120,954 Return on assets held at end of year 2,649 (648 ) 418 2,419 Purchases, sales, and settlements, net (414 ) (22,548 ) 3,561 (19,401 ) Ending balance at March 31, 2020 30,191 48,410 25,371 103,972 Return on assets held at end of year 7,793 4,199 1,558 13,550 Purchases, sales, and settlements, net (1,083 ) (4,182 ) 178 (5,087 ) Transfers, net (7,748 ) (1,043 ) (1,598 ) (10,389 ) Ending balance at March 31, 2021 29,153 47,384 25,509 102,046 Foreign plans Yen in millions Fair value measurement using significant Insurance Real estate and other Total Beginning balance at April 1, 2019 12,494 22,089 34,583 Return on assets held at end of year 559 132 691 Purchases, sales, and settlements, net (373 ) 755 382 Other * (502 ) (679 ) (1,181 ) Ending balance at March 31, 2020 12,178 22,297 34,475 Return on assets held at end of year (3,904 ) (402 ) (4,306 ) Purchases, sales, and settlements, net 139,769 (19,605 ) 120,164 Other * 1,044 1,401 2,445 Ending balance at March 31, 2021 149,087 3,691 152,778 * Primarily consists of translation adjustments. Sony makes contributions to appropriate foreign The expected future benefit payments are as follows: Japanese plans Foreign plans Fiscal year ending March 31 Yen in millions Yen in millions 2022 38,662 106,434 2023 36,885 12,742 2024 38,468 13,063 2025 37,414 13,633 2026 37,947 13,735 2027 — 2031 183,084 76,482 (2) Defined contribution plans Total defined contribution expenses for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Japanese plans 3,353 6,925 10,992 Foreign plans 11,602 10,313 9,639

Stockholders' equity

Stockholders' equity	12 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Stockholders' equity	16. Stockholders’ equity (1) Common stock Changes in the number of shares of common stock issued and outstanding during the fiscal years ended March 31, 2019, 2020 and 2021 have resulted from the following: Number of shares Balance at March 31, 2018 1,266,552,149 Issuance of new shares 149,900 Exercise of stock acquisition rights 4,525,300 Conversion of convertible bonds 2,992 Balance at March 31, 2019 1,271,230,341 Issuance of new shares 184,900 Exercise of stock acquisition rights 2,294,900 Conversion of convertible bonds 86,040 Cancellation of treasury stock (12,737,400 ) Balance at March 31, 2020 1,261,058,781 Balance at March 31, 2021 1,261,058,781 At March 31, 2021, 22,289,133 shares of common stock would be issued upon the conversion or exercise of all convertible bonds and stock acquisition rights outstanding . Conversions of convertible bonds into common stock are accounted for in accordance with the provisions of the Companies Act of Japan (Kaishaho) and related regulations (collectively the “Companies Act”) by crediting approximately one-half paid-in Sony Group Corporation may purchase its own shares at any time by a resolution of the Board of Directors up to the retained earnings available for dividends to shareholders, in accordance with the Companies Act. Sony Group Corporation’s Board of Directors resolved and authorized the repurchase of shares of its own common stock pursuant to the Companies Act and Sony Group Corporation’s Articles of Incorporation at the meeting of the Board of Directors held on May 16, 2019. During the year ended March 31, 2020, Sony Group Corporation repurchased shares of its common stock for an amount of million yen under the above resolution. Based on the resolution of Sony Group Corporation’s Representative Corporate Executive Officer delegated by the Board of Directors, Sony Group Corporation canceled 12,737,400 shares of its common stock held as treasury stock on March 26, 2020. Although Sony Group Corporation approved on August 4, 2020 by resolution of the Board of Directors the setting of parameters for the repurchase of its own common stock pursuant to the Companies Act and Sony Group Corporation’s Articles of Incorporation, no common stock was acquired based on these parameters during the fiscal year ended March 31, 2021. (2) Retained earnings The amount of statutory retained earnings of Sony Group Corporation available for dividends to shareholders as of March 31, 2021 was 913,889 million yen. The appropriation of retained earnings for the fiscal year ended March 31, 2021, including cash dividends for the six-month period ended March 31, 2021, has been incorporated in the consolidated financial statements. This appropriation of retained earnings was approved at the meeting of the Board of Directors of Sony Group Corporation held on April 28, 2021 and was then recorded in the statutory books of account, in accordance with the Companies Act. Retained earnings include Sony’s equity in undistributed earnings of affiliated companies accounted for by the equity method in the amount of 61,226 million yen and 71,417 million yen at March 31, 2020 and 2021, respectively. (3) Other comprehensive income Changes in accumulated other comprehensive income, net of tax, by component for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Yen in millions Unrealized Unrealized Pension liability Foreign Total Balance at March 31, 2018 126,191 (1,242 ) (296,444 ) (445,251 ) (616,746 ) Cumulative effect of ASU (15,526 ) — — — (15,526 ) Other comprehensive income before reclassifications 33,124 2,316 (23,448 ) 10,071 22,063 Amounts reclassified out of accumulated other comprehensive income * 161 (1,093 ) 9,488 (1,627 ) 6,929 Net other comprehensive income 33,285 1,223 (13,960 ) 8,444 28,992 Less: Other comprehensive income attributable to noncontrolling interests 8,915 — 53 (1,578 ) 7,390 Balance at March 31, 2019 135,035 (19 ) (310,457 ) (435,229 ) (610,670 ) Yen in millions Unrealized Unrealized Pension Foreign Debt Total Balance at March 31, 2019 135,035 (19 ) (310,457 ) (435,229 ) — (610,670 ) Other comprehensive income before reclassifications 40,334 1,193 (17,519 ) (75,814 ) 3,032 (48,774 ) Amounts reclassified out of accumulated other comprehensive income * 56 74 92,490 (74 ) — 92,546 Net other comprehensive income 40,390 1,267 74,971 (75,888 ) 3,032 43,772 Less: Other comprehensive income attributable to noncontrolling interests 14,234 — 34 (1,245 ) 1,059 14,082 Balance at March 31, 2020 161,191 1,248 (235,520 ) (509,872 ) 1,973 (580,980 ) Yen in millions Unrealized Unrealized Pension Foreign Debt Total Balance at March 31, 2020 161,191 1,248 (235,520 ) (509,872 ) 1,973 (580,980 ) Other comprehensive income before reclassifications (102,588 ) 5,571 2,358 107,661 (3,081 ) 9,921 Amounts reclassified out of accumulated other comprehensive income * 96 (4,058 ) 10,607 (835 ) (39 ) 5,771 Net other comprehensive income (102,492 ) 1,513 12,965 106,826 (3,120 ) 15,692 Less: Other comprehensive income attributable to noncontrolling interests (11,971 ) — 3 1,183 (583 ) (11,368 ) Transactions with noncontrolling interests shareholders and other 30,635 — (910 ) (300 ) 475 29,900 Balance at March 31, 2021 101,305 2,761 (223,468 ) (404,529 ) (89 ) (524,020 ) * Foreign currency translation adjustments were transferred from accumulated other comprehensive income to net income as a result of a complete or substantially complete liquidation or sale of certain foreign subsidiaries and affiliates. Reclassifications out of accumulated other comprehensive income for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Yen in millions Comprehensive income components Amounts reclassified from Affected line items in consolidated statements of income 2019 2020 2021 Unrealized gains (losses) on securities 235 82 130 Financial services revenue Tax expense or (benefit) (74 ) (26 ) (34 ) Net of tax 161 56 96 Unrealized gains (losses) on derivative instruments (1,093 ) — — Cost of sales — 106 (5,382 ) Net sales — — 285 Interest Total before tax (1,093 ) 106 (5,097 ) Tax expense or (benefit) — (32 ) 1,039 Net of tax (1,093 ) 74 (4,058 ) Pension liability adjustment 9,891 92,514 13,181 * Tax expense or (benefit) (403 ) (24 ) (2,574 ) Net of tax 9,488 92,490 10,607 Foreign currency translation adjustments (1,627 ) (74 ) (835 ) Foreign exchange loss, net, other operating (income) expense, net and other income: other Tax expense or (benefit) — — — Net of tax (1,627 ) (74 ) (835 ) Debt valuation adjustments — — (39 ) Financial services expenses Tax expense or (benefit) — — — Net of tax — — (39 ) Total amounts reclassified out of accumulated other comprehensive income, net of tax 6,929 92,546 5,771 * The amortization of pension and postretirement benefit components is included in the computation of net periodic pension cost. Refer to Note 15. (4) Equity transactions with noncontrolling interests Net income attributable to Sony Group Corporation’s stockholders and transfers (to) from the noncontrolling interests for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Net income attributable to Sony Group Corporation’s stockholders 916,271 582,191 1,171,776 Transfers (to) from the noncontrolling interests: Increase (decrease) in additional paid-in (22,775 ) 16,372 196,002 Change from net income attributable to Sony Group Corporation’s stockholders and transfers (to) from the noncontrolling interests 893,496 598,563 1,367,778 During the fiscal year ended March 31, 2019, Sony acquired from the Estate of Michael Jackson (the “Estate”) the 25.1% interest in Nile Acquisition LLC (“Nile”) held by the Estate. A total of 287.5 million U.S. dollars was paid to the Estate for the acquisition. The difference between the cash consideration paid and the carrying amount of the noncontrolling interests was recognized as a decrease to additional paid-in . During the fiscal year ended March 31, 2020, Sony, through a wholly-owned subsidiary in the Pictures segment, acquired AT&T Inc.’s (“AT&T”) 42% equity interest in Game Show Network, LLC (“Game Show Network”), a U.S.-based media network subsidiary. As a result of this acquisition, Game Show Network has become a wholly-owned subsidiary of Sony. Sony paid 53,992 million yen (496 million U.S. dollars) to AT&T, including 129 million U.S. dollars of dividends Sony distributed to AT&T prior to the acquisition. The difference between the cash paid and the carrying amount of the noncontrolling interests was recognized as an increase to additional paid-in During the fiscal year ended March 31, 2021, Sony Group Corporation acquired all the common shares and the related stock acquisition rights not held by Sony Group Corporation of SFH, a consolidated subsidiary of Sony Group Corporation, and SFH has become a wholly-owned subsidiary of Sony Group Corporation. Consideration for this acquisition was paid-in

Stock-based compensation plans

Stock-based compensation plans	12 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Stock-based compensation plans	17. Stock-based compensation plans The stock-based compensation expense for the fiscal years ended March 31, 2019, 2020 and 2021 was 5,499 million yen, 5,958 million yen and 8,927 million yen, respectively. Sony has a stock-based compensation incentive plan for selected directors, corporate executive officers and employees in the form of a stock acquisition rights plan. The stock acquisition rights generally have three year graded vesting schedules and are exercisable up to ten years from the date of grant. The total cash received from exercises under all of the stock acquisition rights plans during the fiscal years ended March 31, 2019, 2020 and 2021 was 12,757 million yen, 7,560 million yen and 12,430 million yen, respectively. Sony issued new shares of common stock or disposed of treasury stock upon exercise of these rights. The weighted-average fair value per share at the date of grant of stock acquisition rights granted during the fiscal years ended March , , and was yen, yen and yen, respectively. Fiscal year ended March 31 2019 2020 2021 Weighted-average assumptions Risk-free interest rate 1.37 % 0.70 % 0.17 % Expected lives 5.98 years 5.73 years 5.41 years Expected volatility * 32.52 % 29.30 % 26.97 % Expected dividends 0.35 % 0.32 % 0.34 % * Expected volatility was based on the historical volatilities of Sony Group Corporation’s common stock over the expected life of the stock acquisition rights. A summary of the activities regarding the stock acquisition rights plan during the fiscal year ended March 31, 2021 is as follows: Fiscal year ended March 31, 2021 Number of Weighted- Weighted- Total intrinsic value Yen Years Yen in millions Outstanding at beginning of the fiscal year 12,876,700 4,982 Granted 4,534,600 9,221 Exercised 3,178,300 3,911 Forfeited or expired 210,600 6,280 Outstanding at end of the fiscal year 14,022,400 6,653 7.80 68,218 Exercisable at end of the fiscal year 5,800,700 4,535 6.34 38,794 The total intrinsic value of shares exercised under the stock acquisition rights plan during the fiscal years ended March 31, 2019, 2020 and 2021 was 13,325 million yen, 7,575 million yen and 15,202 million yen, respectively. As of March 31, 2021, there was 9,119 million yen of total unrecognized compensation expense related to nonvested stock acquisition rights. This expense is expected to be recognized over a weighted-average period of 2.06 years.

Revenue

Revenue	12 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue	18. Revenue (1) Contract balances Receivables from contracts with customers, contract assets and contract liabilities are comprised of the following: Yen in millions March 31, 2020 March 31, 2021 Receivables from contracts with customers *1 1,126,597 1,176,828 Contract assets *1 13,985 12,204 Contract liabilities *2 271,286 294,911 *1 Receivables from contracts with customers and contract assets are included in the consolidated balance sheets as “Notes and accounts receivable, trade and contract assets” and “Other”, non-current. *2 Contract liabilities are included in the consolidated balance sheets as “Other”, both current and non-current. Contract liabilities principally relate to customer advances received prior to performance. Revenues of 204,265 million yen and million yen were recognized during the fiscal years ended March 31, 2020 and 2021, which were included in the balances of contract liabilities at March 31, 2019 and 2020, respectively. Revenues of 61,706 million yen and million yen were recognized during the fiscal years ended March 31, 2020 and 2021 from performance obligations satisfied prior to March 31, 2019 and 2020, respectively. (2) Performance obligations Remaining (unsatisfied or partially unsatisfied) performance obligations represent future revenues not yet recorded for firm orders that have not yet been performed. Sony applies practical expedients to exclude certain information about the remaining performance obligations, primarily related to contracts with an expected original duration of less than one year, and sales-based or usage-based royalty revenue on licenses of intellectual property. The following table shows the summary of the transaction prices allocated to remaining performance obligations that are unsatisfied at March 31, 2021, of which more than half are expected to be recognized within one year and substantially all within three years. Yen in millions March 31, 2021 Pictures — Motion Pictures and Television Productions *1 644,569 Pictures — Media Networks 20,346 Music *2 57,904 Others 47,211 *1 For Motion Pictures and Television Productions in the Pictures segment, Sony has included all contracts regardless of duration. *2 Amount included in the Music segment primarily consists of minimum royalty guarantees or fixed fees in contracts related to license revenue for ongoing access to an evolving library of content. These contracts also include the potential for sales-based or usage-based royalties to exceed the minimum guarantees, and these additional royalties are excluded from the amount above, of which substantially all are recognized as revenue within three years. (3) Contract costs Contract costs are comprised as follows: Yen in millions March 31, 2020 March 31, 2021 Incremental costs of obtaining a contract 7,464 8,348 Sony applies practical expedients to recognize the incremental costs of obtaining a contract as an expense if the amortization period of the asset that otherwise would have been recognized is one year or less. The amortization of 6,420 million yen and million yen was recognized during the fiscal years ended March 31, 2020 and 2021, respectively. The incremental costs of obtaining a contract are primarily recognized in the EP&S segment for the internet-related service business and amortized to expense over the contract period. (4) Disaggregation of revenue For the breakdown of sales and operating revenue by segments, product categories and geographies, refer to Note 27.

Restructuring charges

Restructuring charges	12 Months Ended
	Mar. 31, 2021
Restructuring and Related Activities [Abstract]
Restructuring charges	19. Restructuring charges As part of its effort to improve the performance of the various businesses, Sony has undertaken a number of restructuring initiatives. Sony defines restructuring initiatives as activities initiated by Sony, which are designed to generate a positive impact on future profitability. These activities include exiting a business or product category, implementing a headcount reduction program, realignment of its manufacturing sites to low-cost areas, utilizing the services of third-party original equipment and design manufacturers (OEMs and ODMs), a review of its development and design structure, and the streamlining of its sales and administrative functions. The restructuring activities are generally short term in nature and are generally completed within one year of initiation. The changes in the accrued restructuring charges for the fiscal years ended March 31, 2019, 2020 and 2021 are as follows: Yen in millions Employee Non-cash * Other Total Balance at March 31, 2018 19,486 — 4,188 23,674 Restructuring costs 24,449 2,731 5,825 33,005 Non-cash — (2,731 ) — (2,731 ) Cash payments (19,150 ) — (2,555 ) (21,705 ) Adjustments 955 — (357 ) 598 Balance at March 31, 2019 25,740 — 7,101 32,841 Restructuring costs 22,957 100 1,653 24,710 Non-cash — (100 ) — (100 ) Cash payments (23,385 ) — (6,703 ) (30,088 ) Adjustments (674 ) — (131 ) (805 ) Balance at March 31, 2020 24,638 — 1,920 26,558 Restructuring costs 19,669 2,806 3,240 25,715 Non-cash — (2,806 ) — (2,806 ) Cash payments (24,246 ) — (3,152 ) (27,398 ) Adjustments (891 ) — 144 (747 ) Balance at March 31, 2021 19,170 — 2,152 21,322 * Significant asset impairments excluded from restructuring charges are described in Note 13. Total costs incurred in connection with these restructuring programs by segment for the fiscal years ended March 31, 2019, 2020 and 2021 are as follows: Yen in millions Fiscal year ended March 31, 2019 Employee Other associated * Total net Depreciation Total Game & Network Services — — — — — Music 2,991 201 3,192 — 3,192 Pictures 4,795 — 4,795 — 4,795 Electronics Products & Solutions 11,437 4,574 16,011 86 16,097 Imaging & Sensing Solutions — — — — — Financial Services — — — — — All Other and Corporate 5,226 3,781 9,007 — 9,007 Total 24,449 8,556 33,005 86 33,091 Yen in millions Fiscal year ended March 31, 2020 Employee Other associated * Total net Depreciation Total Game & Network Services — — — — — Music 3,179 6 3,185 — 3,185 Pictures 545 — 545 — 545 Electronics Products & Solutions 14,500 227 14,727 — 14,727 Imaging & Sensing Solutions — — — — — Financial Services — — — — — All Other and Corporate 4,733 1,520 6,253 256 6,509 Total 22,957 1,753 24,710 256 24,966 Yen in millions Fiscal year ended March 31, 2021 Employee Other associated * Total net Depreciation Total Game & Network Services 3,524 553 4,077 13 4,090 Music (1,139 ) 96 (1,043 ) — (1,043 ) Pictures 1,519 54 1,573 — 1,573 Electronics Products & Solutions 11,466 4,205 15,671 — 15,671 Imaging & Sensing Solutions 1,362 — 1,362 — 1,362 Financial Services — — — — — All Other and Corporate 2,937 1,138 4,075 148 4,223 Total 19,669 6,046 25,715 161 25,876 * Other associated costs includes non-cash Depreciation associated with restructured assets as used in the context of the disclosures regarding restructuring activities refers to the increase in depreciation expense caused by revising the useful life and the salvage value of depreciable fixed assets under an approved restructuring plan. Any impairment of the assets is recognized immediately in the period it is identified. Retirement programs Sony has undergone several headcount reduction programs to further reduce operating costs primarily in an effort to improve the performance of certain segments related t EP&S In an effort to improve the performance of each business in the EP&S segment, Sony has implemented a number of restructuring initiatives targeting profitability improvement. These activities resulted in restructuring charges mainly overseas totaling 16,011 million yen, 14,727 million yen and 15,671 million yen for the fiscal years ended March 31, 2019, 2020 and 2021, respectively.

Supplemental consolidated state

Supplemental consolidated statements of income information	12 Months Ended
	Mar. 31, 2021
Other Income and Expenses [Abstract]
Supplemental consolidated statements of income information	20. Supplemental consolidated statements of income information (1) Other operating (income) expense, net Sony records transactions in other operating (income) expense, net due to either the nature of the transaction or in consideration of factors including the relationship to Sony’s core operations. Other operating (income) expense, net is comprised of the following: Yen in millions March 31 2019 2020 2021 Gain on remeasurement of EMI shares *1 (116,939 ) — — Gain on remeasurement and sale of SRE shares *2 — (17,266 ) — Gain on remeasurement of AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd. shares *3 — (1,827 ) — (Gain) loss on purchase/sale of interests in subsidiaries and affiliates, net (1,557 ) (12,801 ) (16,895 ) (Gain) loss on sale, disposal or impairment of assets, net* 4 46,928 29,778 23,835 Other — (1,495 ) 528 (71,568 ) (3,611 ) 7,468 *1 Refer to Notes 5 and 24. *2 Refer to Note 5. *3 Refer to Notes 5 and 24. *4 Refer to Notes 9, 13 and 19. (2) Research and development costs Research and development costs charged to cost of sales for the fiscal years ended March 31, 2019, 2020 and 2021 were 481,202 million yen, 499,290 million yen and 525,175 million yen, respectively. (3) Advertising costs Advertising costs included in selling, general and administrative expenses for the fiscal years ended March 31, 2019, 2020 and 2021 were 385,500 million yen, 359,458 million yen and 260,068 million yen, respectively. (4) Shipping and handling costs Shipping and handling costs for finished goods included in selling, general and administrative expenses for the fiscal years ended March 31, 2019, 2020 and 2021 were 51,757 million yen, 46,196 million yen and 82,708 million yen, respectively, which included the internal transportation costs of finished goods.

Income taxes

Income taxes	12 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income taxes	21. Income taxes Domestic and foreign components of income before income taxes and the provision for current and deferred income taxes attributable to such income are summarized as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Income before income taxes: Sony Group Corporation and all subsidiaries in Japan 310,020 466,253 488,738 Foreign subsidiaries 701,628 333,197 703,632 1,011,648 799,450 1,192,370 Income taxes — Current: Sony Group Corporation and all subsidiaries in Japan 82,081 105,755 81,706 Foreign subsidiaries 84,667 66,636 72,716 166,748 172,391 154,422 Income taxes — Deferred: Sony Group Corporation and all subsidiaries in Japan 17,907 9,421 (172,095 ) Foreign subsidiaries (139,557 ) (4,622 ) 18,668 (121,650 ) 4,799 (153,427 ) Total income tax expense 45,098 177,190 995 A reconciliation of the differences between the Japanese statutory tax rate and the effective tax rate is as follows: Fiscal year ended March 31 2019 2020 2021 Statutory tax rate 31.5 % 31.5 % 31.5 % Non-deductible 0.7 0.3 0.1 Income tax credits (1.6 ) (1.7 ) (1.2 ) Change in statutory tax rate and law (0.3 ) (0.4 ) (0.1 ) Change in valuation allowances (other than the reversal of valuation allowance in U.S. and Japan national tax below) 2.3 (8.1 ) (5.0 ) The reversal of valuation allowances in the U.S. (15.3 ) — (5.5 ) The reversal of valuation allowances relating to the national tax of Sony Group Corporation and its national tax filing group in Japan — — (18.0 ) Change in deferred tax liabilities on undistributed earnings of foreign subsidiaries and corporate joint ventures (0.1 ) 0.2 0.7 Lower tax rate applied to life and non-life (0.5 ) (0.6 ) (0.4 ) Foreign income tax differential (6.4 ) (2.4 ) (5.0 ) Adjustments to tax reserves (0.3 ) 0.9 (0.3 ) The remeasurement gain for the equity interest in EMI (2.4 ) — — Japan controlled foreign company taxation 0.0 5.3 2.5 Other (3.1 ) (2.8 ) 0.8 Effective income tax rat e 4.5 % 22.2 % 0.1 % On December 22, 2017, the U.S. Tax Reform Act was signed into law, making significant changes to the U.S. tax rules. Changes include, but are not limited to, a corporate tax rate decrease from 35% to 21% effective for tax years beginning January 1, 2018 and the transition of U.S. international taxation from a worldwide tax system to a modified territorial system, with a one-time In addition to lowering the statutory corporate tax rate from 35% to 21%, the U.S. Tax Reform Act also eliminated certain deductions, included new restrictions on the deduction for interest, introduced a new tax regime called the Base Erosion Anti-Abuse Tax or “BEAT”, and changed how foreign earnings of the U.S. group are subject to tax. The U.S. Tax Reform Act also enhanced and extended the option to claim accelerated depreciation and amortization deductions by allowing full expensing of qualified property, including film costs, through 2022. The U.S. Tax Reform Act also provided for beneficial treatment of certain income derived by a U.S. entity from outside the United States (referred to as Foreign Derived Intangible Income or “FDII”). The BEAT creates a minimum tax on multinational corporations by requiring companies subject to the BEAT to pay the greater of their regular tax liability (less certain credits, including foreign tax credits) or 10% for taxable years beginning in 2019 (6.25% for the fiscal year ended March 31, 2019) of a modified tax base which adds back certain related party payments. The BEAT comparison to regular tax must be done each year if the taxpayer’s “base erosion” related party payments exceed Sony provides a valuation allowance for its d As of December 31, 2018, SCA and its U.S. consolidated tax filing group continued its profitable trend, primarily as a result of the G&NS segment and the Music segment. Based on an assessment of the available positive and negative evidence, in the quarter ended December 31, 2018, Sony reversed the valuation allowances established against a significant portion of the deferred tax assets in the United States, primarily for net operating losses, temporary differences and certain tax credits, and recorded a tax benefit of 154,201 million yen. During the fiscal year ended March 31, 2021, Sony reversed additional valuation allowances against general business tax credits and foreign tax credits in the United States. As of September 30, 2020, despite the COVID-19, expected million yen in the quarter ended September 30, 2020. Valuation allowances continue to be recorded on the remaining deferred tax assets in Japan, primarily foreign tax credits, due to restrictions on the use of such assets and their relatively short remaining carryforward periods. The significant components of deferred tax assets and liabilities are as follows: Yen in millions March 31 2020 2021 Deferred tax assets: Operating loss carryforwards for tax purposes 348,714 302,647 Accrued pension and severance costs 77,559 59,608 Amortization including film costs 65,349 45,506 Lease liabilities 100,720 91,186 Warranty reserves and accrued expenses 116,234 138,413 Future insurance policy benefits 42,056 44,023 Inventories 15,512 28,086 Depreciation 39,085 45,096 Tax credit carryforwards 94,900 63,590 Loss on equity securities 11,815 — Allowance for credit losses 9,090 7,958 Impairment of investments 6,029 1,821 Deferred revenue 24,420 24,502 Other 122,591 167,255 Gross deferred tax assets 1,074,074 1,019,691 Less: Valuation allowance (608,243 ) (276,382 ) Total deferred tax assets 465,831 743,309 Deferred tax liabilities: Insurance acquisition costs (170,868 ) (187,155 ) Future insurance policy benefits (193,315 ) (196,045 ) Unbilled accounts receivable in the Pictures segment (26,214 ) (7,894 ) Right-of-use (96,970 ) (85,244 ) Unrealized gains on securities (92,791 ) (51,147 ) Gain on equity securities — (109,218 ) Intangible assets acquired through stock exchange offerings (23,949 ) (23,949 ) Intangible assets derived from EMI Music Publishing acquisition (89,909 ) (93,481 ) Undistributed earnings of foreign subsidiaries and corporate joint ventures (25,359 ) (41,515 ) Investment in M3 (38,303 ) (41,347 ) Other (47,319 ) (65,605 ) Gross deferred tax liabilities (804,997 ) (902,600 ) Net deferred tax liabilities (339,166 ) (159,291 ) Based on the weight of the available positive and negative evidence, for the fiscal year ended March 31, 2021, Sony continued to maintain valuation allowances against the deferred tax assets at certain subsidiaries in Japan, as well as at Sony Mobile Communications in Sweden, Sony Europe B.V. in the United Kingdom, certain subsidiaries in Brazil, and certain subsidiaries in other tax jurisdictions. As of March 31, 2021, Sony Group Corporation and its national tax filing group in Japan recorded a valuation allowance es The net changes in the total valuation allowance were decreases of 176,721 million yen, 114,871 million yen and 331,861 million yen for the fiscal years ended March 31, 2019, 2020 and 2021, respectively. The decrease in the valuation allowances during the fiscal year ended March 31, 2019 was mainly due to the reversal of the valuation allowances on significant deferred tax assets in SCA and its U.S. consolidated tax filing group and the use of net operating loss carryforwards and other deferred tax assets in the national tax filing group in Japan and other jurisdictions. The decrease in the valuation allowances during the fiscal year ended March 31, 2020 was mainly due to the use of net operating loss carryforwards and other deferred tax assets in the national tax filing group in Japan and the use of foreign tax credits and certain research and development credits in the consolidated tax filing group in the United States. The decrease in the valuation allowances during the fiscal year ended March 31, 2021 was mainly due to the reversal of the valuation allowances on significant deferred tax assets in Sony Group Corporation and its national tax filing group in Japan and general business tax credits and foreign tax credits in the consolidated tax At March 31, 2021, 14,573 million yen of deferred income taxes have not been provided on undistributed earnings of certain foreign subsidiaries and corporate joint ventures not expected to be remitted in the foreseeable future totaling 910,802 million yen. In addition, deferred income taxes have not been provided on the gain on the book/tax basis difference in subsidiaries, including a gain of 61,544 million yen on a subsidiary’s sale of stock arising from the issuance of common stock of Sony Music Entertainment (Japan) Inc. in a public offering to third parties in November 1991 and the remeasurement gain for the equity interest in EMI recorded in the fiscal year ended March 31, 2019 (Refer to Note 24). Sony does not anticipate any significant tax consequences on the possible future disposition of these investments based on its tax planning strategies. At March 31, 2021, Sony had net operating loss carryforwards, the tax effect of which totaled 302,647 million yen, which may be available as an offset against future taxable income on tax returns to be filed in various tax jurisdictions. With the exception of 107,935 million yen with no expiration period, substantially all of the total net operating loss carryforwards expire at various dates between the fiscal years ending March 31, 2022 and 2024 Tax credit carryforwards at March 31, 2021 amounted to 63,590 million yen. With the exception of 17,742 million yen with no expiration period, substantially all of the total available tax credit carryforwards expire at various dates between the fiscal years ending March 31, 2022 and 2031 A reconciliation of the beginning and ending gross amounts of unrecognized tax benefits is as follows: Yen in millions March 31 2019 2020 2021 Balance at beginning of the fiscal year 95,425 50,577 41,268 Reductions for tax positions of prior years (31,396 ) (331 ) (761 ) Additions for tax positions of prior years 3,094 162 52 Additions based on tax positions related to the current year 2,594 8,074 8,267 Settlements (4,235 ) (13,240 ) (4,467 ) Lapse in statute of limitations (14,824 ) (1,251 ) (1,095 ) Foreign currency translation adjustments (81 ) (2,723 ) 2,476 Balance at end of the fiscal year 50,577 41,268 45,740 Total net amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate 35,004 29,539 33,126 The major changes in the total gross amount of unrecognized tax benefit balances relate to transfer pricing adjustments, including as a result of the Advance Pricing Agreements (“APAs”) and competent authority requests filed for certain subsidiaries in the G&NS, EP&S and I&SS segments and All Other, with respect to the intercompany cross-border transactions. The APAs include agreements between Sony and the relevant taxing authorities under the authority of the mutual agreement procedure specified in income tax treaties. Sony reviews its estimated tax expense based on the progress made in these procedures, and the progress of transfer pricing audits generally, and makes adjustments to its estimates as necessary. In addition, the APAs are government to government negotiations, and therefore it is possible that the final outcomes of the agreements may differ from Sony’s current assessment of the more-likely-than-not During the fiscal year ended March 31, 2019, Sony reversed 1,479 million yen of interest expense and recorded 218 million yen of penalties. At March 31, 2019, Sony had recorded liabilities of 9,309 million yen and 4,855 million yen for the payments of interest and penalties, respectively. During the fiscal year ended March 31, 2020, Sony reversed 1,276 million yen of interest expense and recorded 117 million yen of penalties. At March 31, 2020, Sony had recorded liabilities of 8,033 million yen and 4,971 million yen for the payments of interest and penalties, respectively. During the fiscal year ended March 31, 2021, Sony Sony operates in multiple jurisdictions throughout the world, and its tax returns are periodically audited by Japanese and foreign taxing authorities. As a result of audit settlements, the conclusion of current examinations, the expiration of the statute of limitations in several jurisdictions and other reevaluations of Sony’s tax positions, it is expected that the amount of unrecognized tax benefits will change in the next twelve months. Accordingly, Sony believes it is reasonably possible that its existing unrecognized tax benefits may be reduced by an amount up to 1,522 million yen within the next twelve months. Sony remains subject to examinations by Japanese taxing authorities for tax years from 2011 through 2020, and by the U.S. tax authorities for tax years from 2017 through 2020 and other material foreign taxing authorities for tax years from 2006 through 2020.

Reconciliation of the differenc

Reconciliation of the differences between basic and diluted EPS	12 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Reconciliation of the differences between basic and diluted EPS	22. Reconciliation of the differences between basic and diluted EPS Reconciliation of the differences between basic and diluted EPS for the fiscal years ended March 31, 2019, 2020 and 2021 is as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Net income attributable to Sony Group Corporation’s stockholders for basic and diluted EPS computation 916,271 582,191 1,171,776 Thousands of shares Weighted-average shares outstanding 1,266,592 1,234,408 1,230,480 Effect of dilutive securities: Stock acquisition rights 4,088 3,853 4,820 Zero coupon convertible bonds 23,966 23,994 15,392 Weighted-average shares for diluted EPS computation 1,294,646 1,262,255 1,250,692 Yen Basic EPS 723.41 471.64 952.29 Diluted EPS 707.74 461.23 936.90 Potential shares of common stock which were excluded from the computation of diluted EPS for the fiscal years ended March 31, 2019 and 2020 were 5,731 thousand shares, 3,212 thousand shares, respectively. Potential shares of common stock were not excluded from the computation of diluted EPS for the fiscal year ended March 31, 2021. Potential shares related to stock acquisition rights were excluded as anti-dilutive for the fiscal years ended March 31, 2019 and 2020 when the exercise price for those shares was in excess of the average market value of Sony’s common stock for those fiscal years. The zero coupon convertible if-converted method upon

Variable interest entities

Variable interest entities	12 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable interest entities	23. Variable interest entities Sony has entered into various arrangements with VIEs. (1) Consolidated VIEs Certain of Sony’s VIEs are (2) Unconsolidated VIEs As described in Note 6, certain accounts receivable sales programs also involve VIEs. These VIEs are all special purpose entities associated with the sponsor banks. Based on a qualitative assessment, Sony is not the primary beneficiary and therefore does not consolidate these entities as Sony does not have the power to direct the activities, an obligation to absorb losses, or the right to receive the residual returns of these VIEs. Sony’s maximum exposure to losses from these VIEs is considered insignificant. In the Financial Services segment, Sony has variable interests in VIEs where Sony is not the primary beneficiary. Sony’s variable interests in such VIEs include equity securities, securitized products, foreign corporate bonds and other investments. The following tables present the carrying value of the variable interests of unconsolidated VIEs in the Financial Services segment, the presentation in the consolidated balance sheet, and the maximum exposure to loss associated with these variable interests as of March 31, 2020 and 2021. Maximum exposure to loss does not reflect Sony’s estimate of the actual losses that could result from adverse changes, nor does it reflect the economic hedges Sony enters into to reduce its exposure. The risks associated with VIEs in which Sony is involved are limited to the amount recorded in the consolidated balance sheets and the amount of commitments. Yen in millions March 31, 2020 Presentation in the consolidated balance Maximum Marketable securities Securities investments and other Prepaid Equity securities *1 579,773 6,229 — 587,602 Securitized products — 210,641 — 210,641 Foreign corporate bonds *2 41,452 41,036 — 82,488 Other investments — 16,253 21,000 43,719 Total 621,225 274,159 21,000 924,450 Yen in millions March 31, 2021 Presentation in the consolidated balance Maximum Marketable securities Securities investments and other Prepaid Equity securities *1 681,201 6,698 — 688,428 Securitized products — 270,818 — 270,818 Foreign corporate bonds *2 49,011 31,026 — 80,037 Other investments 101 42,525 21,000 83,659 Total 730,313 351,067 21,000 1,122,942 *1 Equity securities include Investment funds. *2 Foreign corporate bonds include repackaged bonds.

Acquisitions

Acquisitions	12 Months Ended
	Mar. 31, 2021
Business Combinations [Abstract]
Acquisitions	24. Acquisitions (1) EMI Music Publishing acquisition On November 14, 2018, Sony Corporation of America, Sony’s wholly-owned subsidiary, completed the acquisition of the entirety of the approximately 60% equity interest held by the investor consortium led by the Mubadala Investment Company in DH Publishing, L.P. (“EMI”), which owned and managed EMI Music Publishing, for the equity purchase price of 257,168 million yen (2,269 million U.S. dollars), which includes payments related to warrants and management equity plans. Sony paid all the consideration in cash upon the acquisition. As a result of this acquisition, EMI has become a wholly-owned subsidiary of Sony. This acquisition allows Sony to build upon its music publishing library by providing the Company with full ownership of the EMI Music Publishing catalog which was being administered by Sony’s wholly-owned music publishing subsidiary, Sony/ATV Music Publishing. Sony’s consolidated income statements for the fiscal year ended March 31, 2019 include revenue and operating income of 28,871 million yen (260 million U.S. dollars) and 6,432 million yen (58 million U.S. dollars), respectively, attributable to EMI since the date of acquisition. Sony’s consolidated income statements for the three months ended March 31, 2019 include revenue and operating income of 18,420 million yen (167 million U.S. dollars) and 4,522 million yen (41 million U.S. dollars), respectively, attributable to EMI. Prior to the acquisition, Sony’s interest in EMI was accounted for under the equity method of accounting. As a result of Sony obtaining a controlling interest in EMI, Sony consolidated EMI using the acquisition method of accounting and recorded the fair value of the identifiable assets, liabilities assumed and residual goodwill of EMI. Sony remeasured the approximately 40% equity interest in EMI that Sony already owned prior to the acquisition at a fair value of 141,141 million yen (1,245 million U.S. dollars) which resulted in the recognition of a non-cash The following table summarizes the preliminary and final fair values assigned to the assets and liabilities of EMI that were recorded in the Music segment. Certain areas of the purchase price allocation were not yet finalized as of the fiscal year ended March 31, 2019, including the valuation of income taxes and residual goodwill. Yen in millions Acquired assets (Preliminary) Measurement Acquired assets (Final) Cash and cash equivalents 12,971 12,971 Notes and accounts receivable, trade and contract assets 32,287 32,287 Prepaid expenses and other current assets 10,220 (98 ) 10,122 Securities investments and other 1,476 1,476 Intangibles, net 420,534 420,534 Goodwill 237,271 (1,206 ) 236,065 Other 10,023 10,023 Total assets 724,782 (1,304 ) 723,478 Notes and accounts payable, trade 1,731 1,731 Accounts payable, other and accrued expenses 70,675 70,675 Accrued income and other taxes 3,082 (69 ) 3,013 Long-term debt 148,621 148,621 Accrued pension and severance costs 1,947 1,947 Deferred income taxes 94,849 (1,235 ) 93,614 Other 5,564 5,564 Total liabilities 326,469 (1,304 ) 325,165 Intangibles mainly consists of music publishing catalogs with weighted average amortization periods of 43 years. Goodwill represents unidentifiable intangible assets, such as future growth from new revenue streams and synergies with existing Sony assets and businesses, and is calculated as the excess of the purchase price over the estimated fair value of the tangible and intangible assets acquired and is not deductible for tax purposes. The goodwill recorded in connection with this acquisition is included in the Music segment. The following unaudited supplemental pro forma financial information presents the combined results of operations of Sony and EMI as though the acquisition had occurred as of the beginning of the fiscal year ended March 31, 2018: Yen in millions, Yen per share amounts Fiscal year ended March 31 2019 Net sales 8,738,209 Operating income 801,973 Net income attributable to Sony Group Corporation’s stockholders 817,629 Per share data: — Basic EPS 645.53 — Diluted EPS 631.55 The unaudited supplemental pro forma financial information is based on estimates and assumptions, which Sony believes are reasonable, and is not intended to represent or be indicative of what Sony’s consolidated net income attributable to Sony Group Corporation’s stockholders would have been had the acquisition been completed at the beginning of the fiscal year ended March 31, 2018 and should not be taken as indicative of Sony’s future consolidated net income attributable to Sony Group Corporation’s stockholders. The unaudited supplemental pro forma financial information includes the elimination of equity in net income and consolidation of EMI, the adjustment of the gain from the remeasurement of the previously owned equity interest, incremental intangible asset amortization, net of the related tax effects and the adjustments of expenses incurred in relation to warrants and management equity plans . (2) Insomniac Games, Inc. acquisition On November 15, 2019, Sony Interactive Entertainment LLC, a wholly-owned subsidiary in the G&NS segment of Sony, completed the acquisition of Insomniac Games, Inc. (“Insomniac Games”), a game developer. The consideration for this acquisition of 24,895 million yen (229 million U.S. dollars) was mainly paid in cash. As a result of this acquisition, Insomniac Games has become a wholly-owned subsidiary of Sony. As a result of this acquisition, Sony recorded 17,945 million yen (164 million U.S. dollars) of goodwill and 6,794 million yen (62 million U.S. dollars) of intangible assets. The cash consideration paid in this transaction, net of cash received, is included within Other in the investing activities section of the consolidated statements of cash flows. Pro forma results of operations have not been presented because the effect of the acquisition was not material. (3) Silvergate Media acquisition On December 9, 2019, Sony, through a wholly-owned subsidiary in the Pictures segment, acquired Silvergate Media Group (“Silvergate”), a company focused on developing, producing and licensing children’s animation. The consideration for this acquisition of 21,017 million yen (192 million U.S. dollars) was paid in cash. As a result of this acquisition, Sony owns (1) 100% of Silvergate Topco Limited, which holds all assets of Silvergate other than certain rights held by Silvergate BP Bidco Limited, and (2) 31% of Silvergate BP Bidco Limited, the entity through which Silvergate produces its Peter Rabbit television series, and Sony recorded 11,431 million yen (106 million U.S. dollars) of goodwill and 3,387 million yen (32 million U.S. dollars) of intangible assets. The cash consideration paid in this transaction, net of cash received, is included within Other in the investing activities section of the consolidated statements of cash flows. Pro forma results of operations have not been presented because the effect of the acquisition was not material. (4) Acquisition of equity interests in joint ventures in the life insurance business On January 29, 2020, Sony Life subsidiaries know-how Prior to the acquisition, Sony’s interest in the JVs was accounted for under the equity method of accounting. As a result of Sony obtaining a controlling interest in the JVs, Sony consolidated the JVs using the acquisition method of accounting and recorded the fair value of the identifiable assets, liabilities assumed and residual goodwill of the JVs. Sony remeasured the 50% equity interest in the JVs that Sony already owned prior to the acquisition at a fair value of 13,932 million yen which resulted in the recognition of a non-cash The following table summarizes the fair values assigned to the assets and liabilities of the JVs that were recorded in the Financial Services segment. Yen in millions Cash and cash equivalents 27,380 Marketable securities 530,851 Prepaid expenses and other current assets 21,933 Securities investments and other 15,329 Goodwill 3,609 Other 406 Total assets 599,508 Future insurance policy benefits and other 66,599 Policyholders’ account in the life insurance business 495,248 Other 4,979 Total liabilities 566,826 Goodwill represents the expected improvement of profitability due to business integration with Sony Life and operational efficiency, and is calculated as the excess of the purchase price over the estimated fair value of the tangible and intangible assets acquired and is not deductible for tax purposes. The goodwill recorded in connection with this acquisition is included in the Financial Services segment. Pro forma results of operations have not been presented because the effect of the acquisition was not material. (5) Other acquisitions During the fiscal year ended March 31, 2019, Sony completed other acquisitions for total consideration of 7,743 million yen which were paid for primarily in cash and there was no material contingent consideration subject to future change. As a result of these acquisitions, Sony recorded 5,773 million yen of goodwill and 4,422 million yen of intangible assets. During the fiscal year ended March 31, 2020, Sony completed other acquisitions for total consideration of 6,853 million yen which were paid for primarily in cash and there was no material contingent consideration subject to future change. As a result of these acquisitions, Sony recorded 6,778 million yen of goodwill and 2,301 million yen of intangible assets. During the fiscal year ended March 31, 2021, Sony completed other acquisitions for total consideration of 21,674 million yen which were paid for primarily in cash and there was no material contingent consideration subject to future change. As a result of these acquisitions, Sony recorded 19,954 million yen of goodwill and 6,237 million yen of intangible assets. No significant amounts have been allocated to in-process .

Collaborative arrangements

Collaborative arrangements	12 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Collaborative arrangements	25. Collaborative arrangements Sony’s collaborative arrangements primarily relate to arrangements entered into, through subsidiaries in the Pictures segment, with one or more active participants to jointly finance, produce and/or distribute motion pictures or television programming under which both the subsidiaries and the other active participants share in the risks and rewards of ownership. These arrangements are referred to as co-production Sony typically records an asset for only the portion of the motion pictures or television programming it owns and finances. Sony and the other participants typically distribute the product in different media or markets. Revenues earned and expenses incurred for the media or markets in which Sony distributes the product are typically recorded on a gross basis. Sony typically does not record revenues earned and expenses incurred when the other participants distribute the product. Sony and the other participants typically share in the profits from the distribution of the product in all media or markets. For motion pictures, if Sony is a net receiver of (1) Sony’s share of the profits from the media or markets distributed by the other participants less (2) the other participants’ share of the profits from the media or markets distributed by Sony then the net amount is recorded as net sales. If Sony is a net payer then the net amount is recorded in cost of sales. For television programming, Sony records its share of the profits from the media or markets distributed by the other participants as sales, and the other participants’ share of the profits from the media or markets distributed by Sony as cost of sales. For the fiscal years ended March 31, 2019, 2020 and 2021, 42,343 million yen, 33,921 million yen and 19,944 million yen, respectively, were recorded as net sales for amounts due from the other participants and 22,702 million yen, 21,052 million yen and 24,853 million yen, respectively, were recorded as cost of sales for amounts owed to the other participants in these collaborative arrangements .

Commitments, contingent liabili

Commitments, contingent liabilities and other	12 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments, contingent liabilities and other	26. Commitments, contingent liabilities and other (1) Loan commitments Subsidiaries in the Financial Services segment have lines of credit in accordance with loan agreements with their customers. As of March 31, 2021, the total unused portion of the lines of credit extended under these contracts was 37,322 million yen. Based upon the information currently available, it is not possible to estimate the aggregate amounts of future year-by-year (2) Purchase commitments and other Purchase commitments and other outstanding as of March 31, 2021 amounted to 811,400 million yen. The major components of these commitments are as follows: Certain subsidiaries in the Pictures segment have entered into agreements with creative talent for the development and production of motion pictures and television programming as well as agreements with third parties to acquire completed motion pictures, or certain rights therein, and to acquire the rights to broadcast certain live action sporting events. These agreements cover various periods mainly within three years. As of March 31, 2021, these subsidiaries were committed to make payments under such contracts of 105,921 million yen. Certain subsidiaries in the Music segment have entered into contracts with recording artists, songwriters and companies for the future production, distribution and/or licensing of music product. These contracts cover various periods mainly within five years. As of March 31, 2021, these subsidiaries were committed to make payments of 149,021 million yen under such contracts. In December 2020, Funimation Global Group, LLC, a joint venture between a subsidiary in the Pictures segment and a subsidiary in the Music segment, entered into a definitive agreement to acquire 100% of the equity interest in Ellation Holdings, Inc., a subsidiary of AT&T Inc., which operates the anime business Crunchyroll. The purchase price of this transaction is 1,175 million U.S. dollars subject to customary working capital and other adjustments. This transaction is subject to customary closing conditions, including regulatory approvals. For the Acquisition of certain businesses of Kobalt Music Group Limited, refer to Note 28. Certain subsidiaries in the G&NS segment have entered into long-term contracts for the development, distribution and publishing of game software. These contracts cover various periods mainly within seven years. As of March 31, 2021, these subsidiaries were committed to make payments of 32,959 million yen under such contracts. Sony has entered into purchase contracts for fixed assets. As of March 31, 2021, Sony has committed to make payments of 135,297 million yen under such contracts. Sony has entered into purchase contracts for materials. As of March 31, 2021, Sony has committed to make payments of 96,589 million yen under such contracts. Sony has entered into sponsorship contracts related to advertising and promotional rights. These contracts cover various periods mainly within one year. As of March 31, 2021, Sony has committed to make payments of 5,396 million yen under such contracts. The schedule of the aggregate amounts of year-by-year Fiscal year ending March 31 Yen in millions 2022 519,953 2023 112,975 2024 66,939 2025 53,358 2026 13,786 Later fiscal years 44,389 Total 811,400 (3) Litigation Sony Group Corporation and certain of its subsidiaries are defendants or otherwise involved in pending legal and regulatory proceedings. However, based upon the information currently available, Sony believes that the outcome from such legal and regulatory proceedings would not have a material impact on Sony’s results of operations and financial position. (4) Guarantees Sony has issued guarantees that contingently require payments to guaranteed parties if certain specified events or conditions occur. The maximum potential amount of future payments under these guarantees as of March 31, 2021 amounted to 529 million yen. In addition to the above, Sony also issues contractual product warranties under which it generally guarantees the performance of products delivered and services rendered for a certain period or term. The changes in the product warranty liability for the fiscal years ended March 31, 2019, 2020 and 2021 are as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Balance at beginning of the fiscal year 44,717 33,005 31,807 Additional liabilities for warranties 23,041 21,448 19,560 Settlements (in cash or in kind) (26,326 ) (21,491 ) (19,666 ) Changes in estimate for pre-existing (7,370 ) (562 ) (860 ) Translation adjustments (1,057 ) (593 ) 2,010 Balance at end of the fiscal year 33,005 31,807 32,851 The consideration received for extended warranty service, which is not a significant portion of the warranty activities provided by Sony, is excluded from the amounts in the table above.

Business segment information

Business segment information	12 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Business segment information	27. Business segment information The reportable segments presented below are the segments of Sony for which separate financial information is available and for which operating profit or loss amounts are evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to allocate resources and in assessing performance. The CODM does not evaluate segments using discrete asset information. Sony’s CODM is its Chairman, President and Chief Executive Officer. The G&NS segment includes network services businesses, the manufacture and sales of home gaming products and production and sales of software. The Music segment includes the Recorded Music, Music Publishing and Visual Media and Platform businesses. The Pictures segment includes the Motion Pictures, Television Productions and Media Networks businesses. The EP&S segment includes the Televisions business, the Audio and Video business, the Still and Video Cameras business, the smartphone business and internet-related service business. The I&SS segment includes the image sensors business. The Financial Services segment primarily represents individual life insurance and non-life Segment sales and operating revenue: Yen in millions Fiscal year ended March 31 2019 2020 2021 Sales and operating revenue: Game & Network Services — Customers 2,224,622 1,919,760 2,604,713 Intersegment 86,250 57,791 51,565 Total 2,310,872 1,977,551 2,656,278 Music — Customers 795,025 838,592 927,250 Intersegment 12,464 11,317 12,617 Total 807,489 849,909 939,867 Pictures — Customers 985,270 1,010,714 757,580 Intersegment 1,603 1,140 1,187 Total 986,873 1,011,854 758,767 Electronics Products & Solutions — Customers 2,303,167 1,969,880 1,902,887 Intersegment 17,461 21,388 17,843 Total 2,320,628 1,991,268 1,920,730 Imaging & Sensing Solutions — Customers 770,622 985,259 937,859 Intersegment 108,708 85,317 74,638 Total 879,330 1,070,576 1,012,497 Financial Services — Customers 1,274,708 1,299,847 1,661,520 Intersegment 7,831 7,901 7,401 Total 1,282,539 1,307,748 1,668,921 All Other — Customers 299,806 214,999 196,517 Intersegment 45,931 36,421 32,736 Total 345,737 251,420 229,253 Corporate and elimination (267,781 ) (200,441 ) (186,953 ) Consolidated total 8,665,687 8,259,885 8,999,360 G&NS intersegment amounts primarily consist of transactions with All Other. I&SS intersegment amounts primarily consist of transactions with the G&NS segment and the EP&S segment. All Other intersegment amounts primarily consist of transactions with the G&NS segment, the Music segment and the Pictures segment. Corporate and elimination includes certain brand and patent royalty income. Segment profit or loss: Yen in millions Fiscal year ended March 31 2019 2020 2021 Operating income (loss): Game & Network Services 311,092 238,400 342,192 Music 232,487 142,345 188,056 Pictures 54,599 68,157 80,478 Electronics Products & Solutions 76,508 87,276 139,180 Imaging & Sensing Solutions 143,874 235,584 145,876 Financial Services 161,477 129,597 164,582 All Other (11,127 ) 16,288 11,368 Total 968,910 917,647 1,071,732 Corporate and elimination (74,675 ) (72,188 ) (99,867 ) Consolidated operating income 894,235 845,459 971,865 Other income 144,735 21,949 264,235 Other expenses (27,322 ) (67,958 ) (43,730 ) Consolidated income before income taxes 1,011,648 799,450 1,192,370 Operating income (loss) is sales and operating revenue less costs and expenses, and includes equity in net income (loss) of affiliated companies. Other significant items: Yen in millions Fiscal year ended March 31 2019 2020 2021 Equity in net income (loss) of affiliated companies: Game & Network Services — — — Music (6,915 ) 4,239 570 Pictures 106 (629 ) 123 Electronics Products & Solutions (38 ) 136 (36 ) Imaging & Sensing Solutions — 0 (123 ) Financial Services (682 ) (104 ) — All Other 4,530 5,995 10,953 Consolidated total (2,999 ) 9,637 11,487 Depreciation and amortization: Game & Network Services 29,023 29,135 38,707 Music 21,259 29,137 30,666 Pictures 24,081 21,665 19,330 Electronics Products & Solutions 61,749 63,291 62,145 Imaging & Sensing Solutions 110,746 134,035 152,380 Financial Services, including deferred insurance acquisition costs 91,179 106,667 59,885 All Other 4,940 5,095 4,363 Total 342,977 389,025 367,476 Corporate 31,049 27,617 23,217 Consolidated total 374,026 416,642 390,693 The following table is a breakdown of sales and operating revenue to external customers by product category for each segment. Sony management views each segment as a single operating segment. Yen in millions Fiscal year ended March 31 2019 2020 2021 Sales and operating revenue: Game & Network Services Digital Software and Add-on 1,102,231 1,010,296 1,454,654 Network Services 326,524 337,265 382,950 Hardware and Others 795,867 572,199 767,109 Total 2,224,622 1,919,760 2,604,713 Music Recorded Music — Streaming 227,513 276,039 337,100 Recorded Music — Others 199,413 191,114 179,167 Music Publishing 106,666 157,478 156,862 Visual Media and Platform 261,433 213,961 254,121 Total 795,025 838,592 927,250 Pictures Motion Pictures 436,017 475,061 271,081 Television Productions 288,816 301,224 267,123 Media Networks 260,437 234,429 219,376 Total 985,270 1,010,714 757,580 Electronics Products & Solutions Televisions 788,423 646,513 709,007 Audio and Video 362,580 346,060 313,975 Still and Video Cameras 421,506 384,142 338,694 Mobile Communications 487,330 362,144 358,580 Other 243,328 231,021 182,631 Total 2,303,167 1,969,880 1,902,887 Imaging & Sensing Solutions 770,622 985,259 937,859 Financial Services 1,274,708 1,299,847 1,661,520 All Other 299,806 214,999 196,517 Corporate 12,467 20,834 11,034 Consolidated total 8,665,687 8,259,885 8,999,360 Sony has realigned its product category configuration in regard to the new EP&S segment from the first quarter of the fiscal year ended March 31, 2020. Sony has also realigned its product category configuration in the Music segment with a more detailed breakdown in Recorded Music from the fourth quarter of the fiscal year ended March 31, 2020. In connection with these realignments, all prior period sales amounts by product category in the table above have been reclassified to conform to the current presentation. In the G&NS segment, Digital Software and Add-on add-on Television Productions includes the production, acquisition and distribution of television programming; Media Networks includes the operation of television and digital networks worldwide. In the EP&S segment, Televisions includes LCD and OLED televisions; Audio and Video includes Blu-ray Within the EP&S segment, the operating income (loss) of Mobile Communications for the fiscal years ended March 31, 2019, 2020 and 2021 was (97,136) million yen, (21,057) million yen and 27,671 million yen, respectively . Geographic Information: Sales and operating revenue attributed to countries and areas based on location of external customers for the fiscal years ended March 31, 2019, 2020 and 2021 and property, plant and equipment, net and right-of-use Yen in millions Fiscal year ended March 31 2019 2020 2021 Sales and operating revenue: Japan 2,591,784 2,472,479 2,962,465 United States 1,982,135 1,864,390 2,153,466 Europe 1,862,166 1,697,791 1,816,244 China 770,416 845,235 762,766 Asia-Pacific 912,193 892,026 861,623 Other Areas 546,993 487,964 442,796 Total 8,665,687 8,259,885 8,999,360 Yen in millions March 31 2020 2021 Property, plant and equipment, net and right-of-use Japan 946,922 999,280 United States 214,226 211,109 Europe 67,799 74,313 China 17,996 16,976 Asia-Pacific 46,932 48,515 Other Areas 7,379 12,335 Total 1,301,254 1,362,528 Major countries and areas in each geographic segment excluding Japan, United States and China are as follows: (1) Europe: United Kingdom, France, Germany, Russia, Spain and Sweden (2) Asia-Pacific: India, South Korea, Oceania, Thailand and Malaysia (3) Other Areas: The Middle East/Africa, Brazil, Mexico and Canada There are no individually material countries with respect to sales and operating revenue or property, plant and equipment, net and right-of-use Transfers between reportable business segments or geographic areas are made at individually negotiated prices that are intended to reflect a market-based transfer price. There were no sales and operating revenue with any single major external customer for the fiscal years ended March 31, 2019, 2020 and 2021.

Subsequent events

Subsequent events	12 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Subsequent events	28. Subsequent events (1) Setting of parameters for repurchase of shares of its own common stock Sony Group Corporation approved the setting of the following parameters for repurchase of its own common stock pursuant to the Companies Act of Japan and Sony Group Corporation’s Articles of Incorporation at the meeting of its Board of Directors held on April 28, 2021: 1. Total number of shares for repurchase: 25 million shares (maximum) 2. Total purchase price for repurchase of shares: 200 billion yen (maximum) 3. Period of repurchase: April 30, 2021 to April 28, 2022 (2) Acquisition of certain businesses of Kobalt Music Group Limited On May 18, 2021, Sony Music Entertainment, a wholly-owned subsidiary of Sony, acquired 100% of the shares and related assets of certain subsidiaries of Kobalt Music Group Limited (“Kobalt”) relating to AWAL, Kobalt’s music distribution business mainly for independent recording artists, and Kobalt Neighbouring Rights, Kobalt’s music neighboring rights management business. The consideration for this acquisition of 49,794 million yen (456 million U.S. dollars) was paid in cash. Prior to the closing of the acquisition, the U.K. Competition and Markets Authority (“CMA”) initiated a review of the transaction, and Sony continues to cooperate with such review. The accounting treatment for the acquisition, which is currently under review by the CMA, has not yet been determined as of the date of this report.

SCHEDULE II VALUATION AND QUALI

SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Mar. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS	SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS SONY GROUP CORPORATION AND CONSOLIDATED SUBSIDIARIES Yen in millions Balance Beginning (Note 1) Additions Deductions Other Balance at end of period Fiscal year ended March 31, 2019: Allowance for doubtful accounts 48,663 (25,114 ) 7,112 (5,532 ) 311 25,440 Fiscal year ended March 31, 2020: Allowance for doubtful accounts 25,440 — 9,006 (6,908 ) (1,665 ) 25,873 Fiscal year ended March 31, 2021: Allowance for credit losses (Note 2) 25,873 6,621 12,133 (8,115 ) 1,313 37,825 Notes: 1. Sony adopted ASU 2014-09 from April 1, 2018, and as a result, sales returns are presented as a liability instead of as a contra-asset allowance. Accordingly, Sony changed the presentation from “Allowance for doubtful accounts and sales returns” to “ Allowance Sony also adopted ASU 2016-13 from April 1, 2020, and as a result, the loss allowance is measured at an amount equal to expected credit losses over the contractual term. Accordingly, Sony changed the presentation from “Allowance for doubtful accounts” to “Allowance for credit losses” for the fiscal year ended March 31, 2021. 2. Allowance for credit losses shows the total amounts of loss allowances for both “Notes and accounts receivable, trade and contract assets” and “Securities investments and other” in the consolidated balance sheets. 3. Deductions mainly include both reversals and write-offs. 4. Other mainly includes translation adjustments. Yen in millions Balance Additions Deductions (Note 1) Other Balance at end of period Fiscal year ended March 31, 2019: Valuation allowance — Deferred tax assets 899,835 116,938 (309,226 ) 15,567 723,114 Fiscal year ended March 31, 2020: Valuation allowance — Deferred tax assets 723,114 53,245 (161,547 ) (6,569 ) 608,243 Fiscal year ended March 31, 2021: Valuation allowance — Deferred tax assets 608,243 41,816 (379,661 ) 5,984 276,382 Note: 1. Deductions mainly include the reversal of valuation allowances in Japan and the U.S. for the fiscal year ended March 31, 2021. 2. Translation adjustments and the effect of change in statutory tax rate.

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	12 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of consolidation and accounting for investments in affiliated companies	Basis of consolidation and accounting for investments in affiliated companies - The consolidated financial statements include the accounts of Sony Group Corporation and its majority-owned subsidiary companies, general partnerships and other entities in which Sony has a controlling interest, and variable interest entities (“VIEs”) for which Sony is the primary beneficiary. All intercompany transactions and accounts are eliminated. Investments in business entities in which Sony does not have control, but has the ability to exercise significant influence over operating and financial policies, generally through 20-50% 3-5% On occasion, a consolidated subsidiary or an affiliated company accounted for by the equity method may issue its shares to third parties in either a public or private offering or upon conversion of convertible debt to common stock at amounts per share in excess of or less than Sony’s average per share carrying value. With respect to such transactions, the resulting gains or losses arising from the change in ownership interest are recorded in earnings within the fiscal year in which the change in interest transactions occurs. Gains or losses that result from a loss of a controlling financial interest in a subsidiary are recorded in earnings along with fair value remeasurement gains or losses on any retained investment in the entity, while a change in interest in a consolidated subsidiary that does not result in a change in control is accounted for as a capital transaction and no gains or losses are recorded in earnings. The excess of the cost over the underlying net equity of investments in consolidated subsidiaries and affiliated companies accounted for on an equity basis is allocated to identifiable tangible and intangible assets and liabilities based on fair values at the date of acquisition. The unassigned residual value of the excess of the cost over Sony’s underlying net equity is recognized as goodwill as a component of the investment balance.
Use of estimates	Use of estimates - The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The most significant estimates include those used in determining the valuation of investment securities, valuation of inventories, fair values of long-lived assets, fair values of goodwill and other intangible assets, fair values of assets and liabilities assumed in business combinations, product warranty liability, pension and severance plans, valuation of deferred tax assets, uncertain tax positions, film costs, and insurance related liabilities. Actual results could significantly differ from those estimates. The timing and extent to which the spread of COVID-19
Translation of foreign currencies	Translation of foreign currencies - All asset and liability accounts of foreign subsidiaries and affiliates are translated into Japanese yen at appropriate fiscal year end exchange rates and all income and expense accounts are translated at exchange rates that approximate those rates prevailing at the time of the transactions. The resulting translation adjustments are accumulated as a component of accumulated other comprehensive income. Upon remeasurement of a previously held equity interest in accordance with the accounting guidance for business combinations achieved in stages, accumulated translation adjustments, if any, are included in earnings. Monetary assets and liabilities denominated in foreign currencies are translated at appropriate fiscal year end exchange rates and the resulting translation gains or losses are recognized into income.
Cash, cash equivalents and restricted cash	Cash, cash equivalents and restricted cash - Cash and cash equivalents include all highly liquid investments, with original maturities of three months or less, that are readily convertible to known amounts of cash and are so near maturity that they present insignificant risk of changes in value because of changes in interest rates. Sony includes restricted cash within cash and cash equivalents in the statement of cash flows.
Marketable debt and equity securities	Marketable debt and equity securities - Debt securities designated as available-for-sale held-to-maturity available-for-sale held-to-maturity Debt securities designated as available-for-sale held-to-maturity
Equity securities that do not have readily determinable fair values	Equity securities that do not have readily determinable fair values - Equity securities that do not have readily determinable fair values are measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. If indicators for impairment are present for equity securities that do not have readily determinable fair values, Sony evaluates whether any such equity security is impaired. If any such security is judged to be impaired, Sony recognizes the impairment of the investment and the carrying value is adjusted to its fair value. Determination of impairment is based on the consideration of several factors, including operating results, business plans and estimated future cash flows. Fair value is determined through the use of various methodologies such as discounted cash flows, valuation of recent financings and comparable valuations of similar companies.
Allowance for credit losses	Allowance for credit losses - Sony estimates expected credit losses and recognizes loss allowances for specific financial assets. The loss allowance for not e The loss allowance for securities investments and other is primarily recognized for debt securities classified as available-for-sale held-to-maturity past-due Sony also writes off the gross carrying amount of the financial assets when it cannot reasonably expect to recover all or part of the assets. For the loss allowance for debt securities classified as available-for-sale held-to-maturity, Marketable debt and equity securities”
Inventories	Inventories - Inventories in the Game & Network Services (“G&NS”), Music, Pictures, Electronics Products & Solutions (“EP&S”) and Imaging & Sensing Solutions (“I&SS”) segments are valued at cost, not in excess of the net realizable value – i.e., estimated selling price in the ordinary course of business less reasonably predictable costs of completion and disposal, cost being determined on the “average cost” basis.
Other receivables	Other receivables - Other receivables include receivables which relate to arrangements with certain component manufacturers whereby Sony procures goods, including product components, for these component manufacturers and is reimbursed for the related purchases. No revenue or profit is recognized on these transfers. Sony will repurchase the inventory at a later date from the component manufacturers as either finished goods inventory or as partially assembled product.
Film costs	Film costs - Film costs, including direct production costs, production overhead and acquisition costs, are stated at the lower of unamortized cost or estimated fair value and classified as noncurrent assets. Film costs of content predominantly monetized individually are amortized, and the estimated liabilities for residuals and participations are accrued using an individual-film-forecast method based on the ratio of current period actual revenues to the estimated remaining total revenues. Film costs also include broadcasting rights, which are recognized when the license period begins and the program is available for use and consist of acquired programming to be aired on Sony’s worldwide channel network. Film costs of content predominantly monetized with other content, including broadcasting rights, are amortized based on estimated usage or on a straight-line basis over the useful life, as appropriate, although broadcasting rights licensed under multi-year live-event sports programming agreements are generally amortized based on the ratio of the current period’s actual advertising revenue and an allocation of subscription fee revenue to the estimated total remaining attributable revenues. Estimates used in calculating the fair value of film costs are based upon assumptions about future demand and market conditions and are reviewed on a periodic basis. Content produced by Television Productions and Motion Pictures in the Pictures segment is predominantly monetized individually. Substantially all content within Media Networks is predominantly monetized with other content.
Property, plant and equipment and depreciation	Property, plant and equipment and depreciation - Property, plant and equipment are stated at cost. Depreciation is computed using the straight-line method. Useful lives for depreciation range from 2 to 50 years for buildings and from 2 to 10 years for machinery and equipment. Significant renewals and additions are capitalized at cost. Maintenance and repairs, and minor renewals and betterments are charged to income as incurred.
Leases	Leases - When entering into a contract, Sony determines whether an arrangement contains a lease at its inception. An arrangement contains a lease if it conveys the right to control the use of identified property, plant, or equipment (an identified asset) for a period of time in exchange for consideration. Operating leases are included in operating lease right-of-use right-of-use Right-of-use Right-of-use Right-of-use non-lease right-of-use As of April 1, 2019, Sony adopted Accounting Standards Update (“ASU”) 2016-02, which amends leasing guidance, on a modified retrospective basis with no restatement of comparative periods. Prior to the adoption of ASU 2016-02 on April 1, 2019, right-of-use assets and lease liabilities for operating leases were not recognized in Sony’s consolidated balance sheets.
Goodwill and other intangible assets	Goodwill and other intangible assets - Goodwill and indefinite lived intangible assets are tested annually for impairment during the fourth quarter of the fiscal year and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value below its carrying amount. Such an event or change in circumstances would include unfavorable variances from established business plans, significant changes in forecasted results or volatility inherent to external markets and industries, which are periodically reviewed by Sony’s management. In the fourth quarter of the fiscal year ended March 31, 2021, Sony elected not to perform an optional qualitative assessment of goodwill and instead proceeded directly to a quantitative impairment test by comparing the fair value of a reporting unit with its carrying amount. Reporting units are Sony’s operating segments or one level below the operating segments. If the fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is not considered impaired. If the carrying amount of a reporting unit exceeds its fair value, an impairment loss is recognized in an amount equal to that excess, not to exceed the total amount of goodwill allocated to the reporting unit. Indefinite lived intangible assets are tested for impairment by comparing the fair value of the intangible asset with its carrying value, and if the carrying value of the intangible asset exceeds its fair value, an impairment loss is recognized in an amount equal to that excess. The fair value of a reporting unit or indefinite lived intangible asset is generally determined using a discounted cash flow analysis. This approach uses significant estimates and assumptions, including projected future cash flows, the timing of such cash flows, discount rates reflecting the risk inherent in future cash flows, perpetual growth rates, earnings multiples, the determination of appropriate comparable entities and the determination of whether a premium or discount should be applied to comparables. Consideration is also given to Sony’s market capitalization in relation to the sum of the calculated fair values of the reporting units, including reporting units with no goodwill, and taking into account corporate level assets and liabilities not assigned to individual reporting units as well as a reasonable control premium. The assumptions used for projected future cash flows and the timing of such cash flows are based on the forecast and mid-range e When a business within a reporting unit is disposed of, goodwill is allocated to the disposed business using the relative fair value method. Management believes that the assumptions used to estimate the fair value in the goodwill impairment tests are reasonable, including, but not limited to, the potential impacts arising from the spread of COVID-19. Intangible assets with finite useful lives mainly consist of patent rights, know-how, internal-use know-how, internal-use
Capitalized software	Capitalized software - The costs related to establishing the technological feasibility of software to be sold, leased or otherwise marketed are expensed as incurred as a part of research and development in cost of sales. Costs that are incurred to produce the finished product after technological feasibility is established are capitalized and amortized to cost of sales over the estimated economic life, which is generally three years. The technological feasibility of game software is established when the product master is completed. Consideration to capitalize game software development costs before this point is limited to the development costs of games for which technological feasibility can be proven at an earlier stage. At each balance sheet date, Sony performs reviews to ensure that unamortized capitalized software costs remain recoverable from future profits of the related software products. The costs incurred for internal-use
Deferred insurance acquisition costs	Deferred insurance acquisition costs - Costs that vary with and are directly related to the acquisition or renewal of insurance policies are deferred as long as they are recoverable. The deferred insurance acquisition costs include such items as commissions, medical examination costs and inspection report fees, and are subject to recoverability testing at least annually to ensure that the capitalized amounts do not exceed the present value of anticipated gross profits or premiums less benefits and maintenance expenses, as applicable. The deferred insurance acquisition costs for traditional life insurance contracts are amortized over the premium-paying period of the related insurance policies using assumptions consistent with those used in computing policy reserves. The deferred insurance acquisition costs for non-traditional
Product warranty	Product warranty - Sony provides for the estimated cost of product warranties at the time revenue is recognized. The product warranty is calculated based upon product sales, estimated probability of failure and estimated cost per claim. The variables used in the calculation of the provision are reviewed on a periodic basis.
Future insurance policy benefits	Future insurance policy benefits - Liabilities for future insurance policy benefits are primarily comprised of the present value of estimated future payments to policyholders. These liabilities are computed by the net level premium method based upon the assumptions as to future investment yield, morbidity, mortality, withdrawals and other factors. These assumptions are reviewed on a periodic basis. Liabilities for future policy benefits includes the liabilities for the minimum guarantee benefits of variable annuities and variable life insurance contracts. As discussed below in “ Fair value measurement
Policyholders' account in the life insurance business	Policyholders’ account in the life insurance business - Liabilities for policyholders’ account in the life insurance business represent the contract value that has accrued to the benefit of the policyholders as of the balance sheet date. This liability is generally equal to the accumulated account deposits, plus interest credited, less policyholder withdrawals and other charges assessed against the account balances. Liabilities for policyholders’ account in the life insurance business includes the liabilities related to the variable annuities and variable life insurance contracts with minimum guarantee benefits. As discussed below in “ Fair value measurement
Impairment of long-lived assets	Impairment of long-lived assets - Sony reviews the recoverability of the carrying value of its long-lived assets held and used, other than goodwill and intangible assets with indefinite lives, and assets to be disposed of, whenever events or changes in circumstances indicate that the individual carrying amount of an asset or asset group may not be recoverable. Long-lived assets to be held and used are reviewed for impairment by comparing the carrying value of the asset or asset group with their estimated undiscounted future cash flows. If the cash flows are determined to be less than the carrying value of the asset or asset group, an impairment loss would be recognized during the period for the amount by which the carrying value of the asset or asset group exceeds estimated fair value. Long-lived assets that are to be disposed of other than by sale are considered held and used until they are disposed of. Long-lived assets that are to be disposed of by sale are reported at the lower of their carrying value or fair value less cost to sell and are not depreciated. Fair value is determined using the present value of estimated net cash flows or comparable market values. This approach uses significant estimates and assumptions including projected future cash flows, the timing of such cash flows, discount rates reflecting the risk inherent in future cash flows, perpetual growth rates applied to determine terminal values, determination of appropriate market comparables and the determination of whether a premium or discount should be applied to comparables. Management believes that the estimates of future cash flows and fair values are reasonable, including, but not limited to, the potential impacts arising from the spread of COVID-19.
Fair value measurement	Fair value measurement - Sony measures fair value as an exit price, or the amount that would be received to sell an asset or paid to transfer a liability elected the fair value option in the banking business for certain foreign securities. The election was made to mitigate accounting mismatches related to fluctuations of foreign exchange rates by allowing the gains and losses on the translation of these securities to be included in current earnings. Sony has also elected the fair value option for certain future insurance policy benefits and policyholders’ account in the life insurance business which are not normally measured at fair value. The election was made to mitigate accounting mismatches related to the changes in the fair value between liabilities for those future insurance policy benefits and policyholders’ account due to changes in the minimum guarantee risk of contracts of variable annuities with minimum guarantee benefits, and the underlying investment managed for policyholders and derivatives. Changes in fair value resulting from changes in instrument-specific credit risk were estimated by incorporating the certain subsidiary’s current credit spreads, and are recognized in other comprehensive income, net of tax. The accounting guidance for fair value measurements specifies a hierarchy of inputs to valuation techniques based on the extent to which inputs used in measuring fair value are observable in the market. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Sony’s assumptions about the assumptions that market participants would use in pricing the asset or liability. Observable market data is used if such data is available without undue cost and effort. Each fair value measurement is reported in one of three levels which is determined by the lowest level input that is significant to the fair value measurement in its entirety. These levels are: Level 1 — Inputs are unadjusted quoted prices for identical assets and liabilities in active markets. Level 2 — Inputs are based on observable inputs other than level 1 prices, such as quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations, in which all significant inputs are observable in active markets. Level 3 — One or more significant inputs are unobservable. When available, Sony uses unadjusted quoted market prices in active markets to measure fair value and classifies such items within level 1. If quoted market prices are not available, fair value is based upon internally developed valuation techniques that use, where possible, current market-based or independently sourced market parameters, such as interest rates, currency rates and option volatilities. Items valued using internally generated models are classified according to the lowest level input that is significant to the valuation. For certain financial assets and liabilities, Sony determines fair value using third-party information such as indicative quotes from dealers and quantitative input from investment advisors following Sony’s established valuation procedures including validation against internally developed prices. Additionally, Sony considers both counterparty credit risk and Sony’s own creditworthiness in determining fair value. Sony attempts to mitigate credit risk to third parties by entering into netting agreements and actively monitoring the creditworthiness of counterparties and its exposure to credit risk through the use of credit limits and by selecting major international banks and financial institutions as counterparties.
Derivative financial instruments	Derivative financial instruments - All derivatives are recognized as either assets or liabilities in the consolidated balance sheets at fair value on a gross basis. Changes in the fair value of derivative financial instruments are either recognized periodically in income or stockholders’ equity (as a component of accumulated other comprehensive income), depending on whether the derivative financial instrument qualifies as a hedge and the derivative is being used to hedge changes in fair value or cash flows. The accounting guidance for hybrid financial instruments permits an entity to elect fair value remeasurement for any hybrid financial instrument if the hybrid instrument contains an embedded derivative that would otherwise be required to be bifurcated and accounted for separately under accounting guidance for derivative instruments and hedging activities. The election to measure the hybrid instrument at fair value is made on an instrument-by-instrument In accordance with accounting guidance for derivative instruments and hedging activities, various derivative financial instruments held by Sony are classified and accounted for as described below. Fair value hedges Changes in the fair value of derivatives designated as fair value hedges for recognized assets or liabilities or unrecognized firm commitments are recognized in earnings as offsets to changes in the fair value of the related hedged assets or liabilities. Cash flow hedges Changes in the fair value of derivatives designated as cash flow hedges for forecasted transactions or exposures associated with recognized assets or liabilities are initially recorded in other comprehensive income and reclassified into earnings when the hedged transaction affects earnings. The time value component of the fair value of option contracts is excluded from the assessment of hedge effectiveness and recognized in earnings on a straight-line basis over the life of the hedging instruments. Any difference between the change in fair value of the excluded component and the accumulated amount recognized in earnings on a straight-line basis is recognized in other comprehensive income. Derivatives not designated as hedges Changes in the fair value of derivatives that are not designated as hedges are recognized immediately in earnings. Assessment of hedges When applying hedge accounting, Sony formally documents all hedging relationships between the derivatives designated as hedges and the hedged items, as well as its risk management objectives and strategies for undertaking various hedging activities. Sony links all hedges that are designated as fair value or cash flow hedges to specific assets or liabilities on the consolidated balance sheets or to the specific forecasted transactions. Sony also assesses, both at the inception of the hedge and on an on-going
Stock-based compensation	Stock-based compensation - Sony accounts for stock-based compensation using the fair value-based method and the expense is mainly included in selling, general and administrative expenses. Sony accounts for its stock acquisition rights plan using the fair value measured on the date of grant using the Black-Scholes option-pricing model. The stock acquisition rights plan is recognized, net of an estimated forfeiture rate, over the requisite service period using the accelerated method of amortization for grants with graded vesting. The estimated forfeiture rate is based on Sony’s historical experience in the stock acquisition rights plans where the majority of the vesting terms have b e
Revenue recognition	Revenue recognition - Sony recognizes revenue in an amount that reflects the consideration Sony expects in exchange for satisfying performance obligations to transfer the goods or services promised in contracts with customers. This is in accordance with the following steps: Step 1: Identify the contract(s) with a customer. Step 2: Identify the performance obligations in the contract. Step 3: Determine the transaction price. Step 4: Allocate the transaction price to the performance obligations in the contract. Step 5: Recognize revenue when (or as) Sony satisfies a performance obligation. Sony owns a variety of intellectual property throughout its segments and recognizes revenue through the licensing of such intellectual property. Sony has both functional and symbolic intellectual property. The licensing of functional intellectual property grants a customer a right to use Sony’s intellectual property as it exists at a point in time, and Sony satisfies its performance obligation at the point in time when the customer obtains control and is entitled to benefit from the license. The licensing of symbolic intellectual property grants a customer a right to access Sony’s intellectual property over time, and Sony satisfies its performance obligation over the license period as S o Incremental costs of obtaining a contract and costs to fulfill a contract are recognized as assets when Sony expects to recover these costs. The incremental costs of obtaining a contract are those costs that would not have been incurred if the contract had not been obtained. Costs to fulfill a contract are those costs that are directly related to a contract or to an anticipated contract and that generate or enhance resources for Sony to satisfy its performance obligations. Sony applies a practical expedient and recognizes the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that would have been recognized is one year or less. Performance obligations in contracts for the EP&S and I&SS segments are primarily to deliver various kinds of electronic equipment, instruments and devices to customers. Revenues from these performance obligations are generally recognized when a promised good is delivered to a customer. However, if the sales contract contains a customer acceptance provision, then revenues are recognized when the customer accepts the promised good or when a deemed acceptance occurs by the lapse of time. Revenues are also recognized over time, primarily from the provision of internet broadband network services to subscribers over the subscription period. Revenues are recognized net of anticipated returns and sales incentives. Within the G&NS segment, revenues from hardware, peripherals and software discs are recognized when performance obligations are satisfied by transferring control to the retailer/distributor, net of anticipated returns, sales incentives and cooperative advertising obligations. Revenues from platform licensing to publishers are recognized when physical software discs are delivered. Revenues from digital game content, which is licensed functional intellectual property, are recognized when the digital content is made available for use by the licensee via an online platform, net of anticipated sales incentives and credit card chargebacks. Revenues from digital game content involving multiple performance obligations, such as obligations to make content available on future dates, are allocated to each performance obligation based on the relative standalone selling prices that are observable in the market or Sony’s best estimate. Revenues from subscription fees for digital subscription services are recognized over the subscription period. Within the Music segment, Sony licenses intellectual property that transfer to a customer either a right to use Sony’s intellectual property as it exists at the point in time in which the license is granted, or a right to access Sony’s intellectual property as it exists throughout the license period. Revenues are recognized when the customer has the right to use or access the intellectual property and obtains control of the use or access of that license. Digital revenues include revenues from contracts with digital streaming services typically recognized as a single performance obligation, which is ongoing access to intellectual property in an evolving library of content over the contract term, predicated on: (1) the business practice and contractual ability to remove specific content without a requirement to replace the content and without impact to minimum royalty guarantees and (2) the contracts not containing a specific listing of content subject to the license. For these contracts, revenues are recognized on the basis of sales and usage royalties, except where there is an amount of a minimum royalty guarantee that is not expected to be recouped, or a fixed fee, which is recognized on a straight-line basis over the term of the contract. Revenues from the sale of physical product such as CDs, net of anticipated returns and sales incentives, are recognized when delivery has occurred and the product is available for sale to the public. Within the Pictures segment, revenues from the theatrical exhibition of motion pictures are recognized as the customer exhibits the film. Revenues from the licensing of motion picture and television programming for pay and free television exhibition and other markets are recognized when the product is available for use by the licensee. Revenues for motion picture and television program licensing arrangements involving multiple performance obligations, for example a fee for multiple titles, territories or availability dates, are allocated based on the relative standalone selling price of each performance obligation using Sony’s best estimate based on available information such as market conditions and internal pricing guidelines. Each individual motion picture or television programming product delivered generally represents a separate performance obligation. Licensing revenue associated with certain renewals or extensions of existing agreements for motion pictures and television programming is recognized when the licensee can use and benefit from the content under the renewal or extension. Licensing revenue associated with minimum guarantees for symbolic intellectual property is recognized ratably over the license term. For home entertainment distribution, revenues from the sale of physical product such as DVDs and Blu-ray TM delivery has occurred and the product is available for sale to the public. Revenues from electronic sell-through and video-on-demand p Within the Financial Services segment, traditional life insurance policies that the life insurance subsidiary underwrites, most of which are categorized as long-duration contracts, mainly consist of whole life, term life and accident and health insurance contracts. Premiums from these policies are reported as revenue when due from policyholders. Amounts received as payment for non-traditional non-life Revenue is recognized net of any taxes collected fr o
Cost of sales	Cost of sales - Costs classified as cost of sales relate to the producing and manufacturing of products and include items such as material cost, subcontractor cost, depreciation of fixed assets, amortization of intangible assets, personnel expenses, research and development costs, and amortization of film costs related to motion picture and television productions.
Research and development costs	Research and development costs - Research and development costs, included in cost of sales, include items such as salaries, personnel expenses and other direct and indirect expenses associated with research and product development. Research and development costs are expensed as incurred.
Selling, general and administrative	Selling, general and administrative - Costs classified as selling expenses relate to promoting and selling products and include items such as advertising, promotion, shipping and warranty expenses. General and administrative expenses include operating items such as officers’ salaries, personnel expenses, depreciation of fixed assets, office rental for sales, marketing and administrative divisions, allowance for credit losses and amortization of intangible assets.
Financial services expenses	Financial services expenses - Financial services expenses include a provision for policy reserves and amortization of deferred insurance acquisition costs, and all other operating costs, such as personnel expenses, depreciation of fixed assets, and office rental of subsidiaries, in the Financial Services segment.
Advertising costs	Advertising costs - Advertising costs are expensed when the advertisement or commercial appears in the selected media.
Shipping and handling costs	Shipping and handling costs - The majority of shipping and handling, warehousing and internal transfer costs for finished goods are included in selling, general and administrative expenses. An exception to this is in the Pictures segment where such costs are charged to cost of sales as they are an integral part of producing and distributing motion pictures and television programming. All other costs related to Sony’s distribution network are included in cost of sales, including inbound freight charges, purchasing and receiving costs, inspection costs and warehousing costs for raw materials and in-process
Income taxes	Income taxes - The provision for income t Carrying amounts of deferred tax assets require a reduction by a valuation allowance if, based on the available evidence, it is more likely than not that such assets will not be realized. Accordingly, the need to establish valuation allowances for deferred tax assets is assessed periodically with appropriate consideration given to all positive and negative evidence related to the realization of the deferred tax assets. Management’s judgments related to this assessment consider, among other matters, the nature, frequency and severity of current and cumulative losses on an individual tax jurisdiction basis, forecasts of future profitability after consideration of uncertain tax positions, excess of appreciated asset value over the tax basis of net assets, the duration of statutory carryforward periods, the past utilization of net operating loss carryforwards prior to expiration, as well as prudent and feasible tax planning strategies which would be employed by Sony to prevent net operating loss and tax credit carryforwards from expiring unutilized. Sony records assets and liabilities for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in a tax return. Sony continues to recognize interest and penalties, if any, with respect to income taxes, including unrecognized tax benefits, as interest expense and as income tax expense, respectively, in the consolidated statements of income. The amount of income taxes Sony pays is subject to ongoing audits by various taxing authorities, which may result in proposed assessments. In addition, several significant items related to intercompany transfer pricing are currently the subject of negotiations between taxing authorities in different jurisdictions as a result of pending advance pricing agreement applications and competent authority requests. Sony’s estimate for the potential outcome for any uncertain tax issues is judgmental and requires significant estimates. Sony assesses its income tax positions and records tax benefits for all years subject to examinations based upon the evaluation of the facts, circumstances and information available at that reporting date. For those tax positions for which it is more likely than not that a tax benefit will be sustained, Sony records the amount that has a greater than 50% likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. If Sony does not believe that it is more likely than not that a tax benefit will be sustained, no tax benefit is recognized. However, Sony’s future results may include favorable or unfavorable adjustments to Sony’s estimated tax liabilities due to closure of income tax examinations, the outcome of negotiations between taxing authorities in different jurisdictions, new regulatory or judicial pronouncements or other relevant events. As a result, the amount of unrecognized tax benefits, and the effective tax rate, may fluctuate significantly. The U.S. Tax Cuts and Jobs Act of 2017 (the “U.S. Tax Reform Act”) subjects a U.S. entity to tax on Global Intangible Low Tax Income (“GILTI”) earned by its foreign subsidiaries. Sony has elected to account for GILTI as a current period expense when incurred.
Net income (loss) attributable to Sony Group Corporation's stockholders per share ("EPS")	Net income (loss) attributable to Sony Group Corporation’s stockholders per share (“EPS”) - Basic EPS is computed based on the weighted-average number of shares of common stock outstanding during each period. The computation of diluted EPS reflects the maximum possible dilution from conversion, exercise, or contingent issuance of securities. All potentially dilutive securities are excluded from the calculation in a situation where there is a net loss attributable to Sony Group Corporation’s stockholders.
Recently adopted accounting pronouncements	(2) Recently adopted accounting pronouncements Measurement of credit losses on financial instruments - In June 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-13, Improvements to Accounting for Costs of Films and License Agreements for Program Materials - In March 2019, the FASB issued ASU 2019-02, title-by-title Changes to the opening balances resulting from the adoption of the above ASUs were as follows: Yen in millions March 31, 2020 Impact of Adoption April 1, 2020 ASU 2016-13 ASU 2019-02 Total ASSETS Current assets: Notes and accounts receivable, trade and contract assets 1,028,793 — — — 1,028,793 Allowance for credit losses * (25,873 ) (280 ) — (280 ) (26,153 ) Inventories 589,969 — (31,517 ) (31,517 ) 558,452 Other receivables 188,106 (30 ) — (30 ) 188,076 Prepaid expenses and other current assets 594,021 (12 ) — (12 ) 594,009 Total current assets 5,735,145 (322 ) (31,517 ) (31,839 ) 5,703,306 Film costs 427,336 — 31,517 31,517 458,853 Investments and advances: Securities investments and other 12,526,210 780 — 780 12,526,990 Allowance for credit losses — (6,341 ) — (6,341 ) (6,341 ) Total investments and advances 12,734,132 (5,561 ) — (5,561 ) 12,728,571 Other assets: Deferred income taxes 210,372 45 — 45 210,417 Other 340,005 (721 ) — (721 ) 339,284 Total other assets 3,234,086 (676 ) — (676 ) 3,233,410 Total assets 23,039,343 (6,559 ) — (6,559 ) 23,032,784 LIABILITIES Deferred income taxes 549,538 (1,504 ) — (1,504 ) 548,034 Total liabilities 18,242,041 (1,504 ) — (1,504 ) 18,240,537 EQUITY Sony Group Corporation’s stockholders’ equity: Retained earnings 2,768,856 (3,669 ) — (3,669 ) 2,765,187 Total Sony Group Corporation’s stockholders’ equity 4,125,306 (3,669 ) — (3,669 ) 4,121,637 Noncontrolling interests 664,229 (1,386 ) — (1,386 ) 662,843 Total equity 4,789,535 (5,055 ) — (5,055 ) 4,784,480 Total liabilities and equity 23,039,343 (6,559 ) — (6,559 ) 23,032,784 * Under ASU 2016-13, Disclosures for Fair Value Measurement - In August 2018, the FASB issued ASU 2018-13, Disclosures for Defined Benefit Plans - In August 2018, the FASB issued ASU 2018-14,
Recent accounting pronouncements not yet adopted	(3) Recent accounting pronouncements not yet adopted On February 3, 2021, Sony announced that its Board of Directors approved the voluntary adoption of International Financial Reporting Standards (“IFRS”) for its consolidated financial statements, in lieu of the currently applied U.S. GAAP. This decision was made with the goal of further streamlining and maintaining the quality of Sony’s financial and management reporting systems over the mid- s
Reclassifications	(4) Reclassifications Certain reclassifications of the financial statements and accompanying footnotes for the fiscal years ended March 31, 2019 and 2020 have been made to conform to the presentation for the fiscal year ended March 31, 2021.

Summary of significant accoun_3

Summary of significant accounting policies (Tables)	12 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncement Balance Sheet	Changes to the opening balances resulting from the adoption of the above ASUs were as follows: Yen in millions March 31, 2020 Impact of Adoption April 1, 2020 ASU 2016-13 ASU 2019-02 Total ASSETS Current assets: Notes and accounts receivable, trade and contract assets 1,028,793 — — — 1,028,793 Allowance for credit losses * (25,873 ) (280 ) — (280 ) (26,153 ) Inventories 589,969 — (31,517 ) (31,517 ) 558,452 Other receivables 188,106 (30 ) — (30 ) 188,076 Prepaid expenses and other current assets 594,021 (12 ) — (12 ) 594,009 Total current assets 5,735,145 (322 ) (31,517 ) (31,839 ) 5,703,306 Film costs 427,336 — 31,517 31,517 458,853 Investments and advances: Securities investments and other 12,526,210 780 — 780 12,526,990 Allowance for credit losses — (6,341 ) — (6,341 ) (6,341 ) Total investments and advances 12,734,132 (5,561 ) — (5,561 ) 12,728,571 Other assets: Deferred income taxes 210,372 45 — 45 210,417 Other 340,005 (721 ) — (721 ) 339,284 Total other assets 3,234,086 (676 ) — (676 ) 3,233,410 Total assets 23,039,343 (6,559 ) — (6,559 ) 23,032,784 LIABILITIES Deferred income taxes 549,538 (1,504 ) — (1,504 ) 548,034 Total liabilities 18,242,041 (1,504 ) — (1,504 ) 18,240,537 EQUITY Sony Group Corporation’s stockholders’ equity: Retained earnings 2,768,856 (3,669 ) — (3,669 ) 2,765,187 Total Sony Group Corporation’s stockholders’ equity 4,125,306 (3,669 ) — (3,669 ) 4,121,637 Noncontrolling interests 664,229 (1,386 ) — (1,386 ) 662,843 Total equity 4,789,535 (5,055 ) — (5,055 ) 4,784,480 Total liabilities and equity 23,039,343 (6,559 ) — (6,559 ) 23,032,784 * Under ASU 2016-13,

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Mar. 31, 2021
Inventory Disclosure [Abstract]
Summary of Inventories	Inventories are comprised of the following: Yen in millions March 31 2020 2021 Finished products 345,231 398,478 Work in process 149,969 133,560 Raw materials, purchased components and supplies 94,769 105,353 Inventories 589,969 637,391

Film costs (Tables)

Film costs (Tables)	12 Months Ended
	Mar. 31, 2021
Other Industries [Abstract]
Summary of Film Costs	Film costs are comprised of the following: Yen in millions March 31 2020 2021 Motion picture productions: Released 99,482 68,302 Completed and not released 18,776 20,148 In production and development 67,199 141,268 Television productions: Released 186,344 126,236 In production and development 25,093 33,712 Film costs for content predominantly monetized individually 396,894 389,666 Film costs for Media Networks content*1 61,959 69,760 Less: current portion of broadcasting rights included in inventories *2 (31,517 ) — Film costs 427,336 459,426 *1 Substantially all of Sony’s film costs for Media Networks content are broadcasting rights and predominantly monetized with other content. *2 Sony adopted ASU 2019-02 effective as of April 1, 2020, and as a result, broadcasting rights in the Pictures segment and animation film production costs in the Music segment were reclassified from inventories to film costs.
Summary of Unamortized Film Costs	Unamortized film costs for released content and Media Networks content at March 31, 2021 are expected to be amortized as follows: Fiscal year ending March 31 Film costs for released content Film costs for 2022 77 % 42 % 2023 11 % 24 % 2024 3 % 14 % Total 91 % 80 %

Investments in affiliated com_2

Investments in affiliated companies (Tables)	12 Months Ended
	Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Summarized Combined Financial Information Provided by Equity Investees	The summarized combined financial information that is based on information provided by the equity investees including information for significant equity affiliates and the reconciliation of such information to the consolidated financial statements is shown below: Balance Sheets Yen in millions March 31 2020 2021 Current assets 389,195 435,910 Noncurrent assets 164,852 172,795 Current liabilities 194,219 208,306 Noncurrent liabilities and noncontrolling interests 60,469 61,232 Percentage of ownership in equity investees 20%-50 % 20%-50 % Statements of Income Yen in millions Fiscal year ended March 31 2019 2020 2021 Net revenues 390,457 387,678 414,934 Operating income 53,920 58,431 78,096 Net income attributable to controlling interests 5,539 34,916 46,914 Percentage of ownership in equity investees 20%-50 % 20%-50 % 20%-50 %
Account Balances and Transactions with Affiliated Companies Accounted for under Equity Method	Account balances and transactions with affiliated companies accounted for under the equity method are presented below. There are no other material transactions or account balances with any other related parties. Yen in millions March 31 2020 2021 Accounts receivable, trade 12,030 5,814 Other receivables 1,589 3,014 Other current assets 9,757 16,097 Accounts payable, trade 1,497 1,409 Short-term borrowings 31,557 21,367 Finance lease liabilities and other 34,564 48,018 Operating lease liabilities 2,393 2,730 Yen in millions Fiscal year ended March 31 2019 2020 2021 Sales 41,437 35,951 32,372 Purchases 5,584 3,479 3,058

Marketable securities and sec_2

Marketable securities and securities investments (Tables)	12 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Aggregate Cost, Gross Unrealized Gains and Losses and Fair Value Pertaining to Available-for-Sale Securities and Held-to-Maturity Securities	Marketable securities and securities investments, primarily held in the Financial Services segment, include debt securities for which the aggregate cost, gross unrealized gains and losses and fair value pertaining to available-for-sale held-to-maturity Yen in millions March 31, 2020 March 31, 2021 Cost Gross Gross Fair value Cost Gross Gross Fair value Debt securities: Available-for-sale Japanese national government bonds 1,552,036 210,459 (566 ) 1,761,929 2,301,995 159,880 (18,609 ) 2,443,266 Japanese local government bonds 69,132 73 (33 ) 69,172 73,989 94 (20 ) 74,063 Japanese corporate bonds 202,164 19,112 (567 ) 220,709 259,932 13,356 (1,475 ) 271,813 Foreign government bonds 198,777 81,014 (14 ) 279,777 323,557 23,118 (20,819 ) 325,856 Foreign corporate bonds 361,422 507 (2,179 ) 359,750 382,231 1,102 (459 ) 382,874 Securitized products 205,223 0 — 205,223 198,593 — — 198,593 Other 14,398 1,867 (12 ) 16,253 42,469 3,492 (140 ) 45,821 2,603,152 313,032 (3,371 ) 2,912,813 3,582,766 201,042 (41,522 ) 3,742,286 Held-to-maturity Japanese national government bonds 6,204,505 2,098,885 (1,397 ) 8,301,993 6,244,125 1,650,057 (13,390 ) 7,880,792 Japanese local government bonds 2,504 331 — 2,835 1,716 294 — 2,010 Japanese corporate bonds 482,050 61,176 (4,754 ) 538,472 543,870 36,071 (14,919 ) 565,022 Foreign government bonds 723,937 302,297 — 1,026,234 850,740 51,494 (25,277 ) 876,957 Foreign corporate bonds 98 7 — 105 27,392 572 (109 ) 27,855 Securitized products 5,418 — (421 ) 4,997 69,062 65 (4 ) 69,123 7,418,512 2,462,696 (6,572 ) 9,874,636 7,736,905 1,738,553 (53,699 ) 9,421,759 Total 10,021,664 2,775,728 (9,943 ) 12,787,449 11,319,671 1,939,595 (95,221 ) 13,164,045
Cost and Fair Value of Debt Securities Classified as Available-for-Sale Securities and Held-to-Maturity Securities by Contractual Maturity	The following table presents the cost and fair value of debt securities classified as available-for-sale held-to-maturity Yen in millions March 31, 2021 Available-for-sale Held-to-maturity Cost Fair value Cost Fair value Due in one year or less 568,574 568,625 6,680 6,757 Due after one year through five years 419,311 434,470 288,952 307,127 Due after five years through ten years 650,929 725,747 252,897 284,725 Due after ten years 1,943,952 2,013,444 7,188,376 8,823,150 Total 3,582,766 3,742,286 7,736,905 9,421,759
Gross Unrealized Losses and Fair Value of Securities with Unrealized Losses, Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position	The following tables present the gross unrealized losses on, and fair value of, Sony’s investment securities with unrealized losses, aggregated by investment category and the length of time that individual investment securities have been in a continuous unrealized loss position, at March 31, 2020 and 2021. Yen in millions March 31, 2020 Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized Debt securities: Available-for-sale Japanese national government bonds 51,746 (539 ) 2,032 (27 ) 53,778 (566 ) Japanese local government bonds 25,010 (10 ) 16,340 (23 ) 41,350 (33 ) Japanese corporate bonds 62,118 (548 ) 10,694 (19 ) 72,812 (567 ) Foreign government bonds — — 1,537 (14 ) 1,537 (14 ) Foreign corporate bonds 86,220 (2,133 ) 18,896 (46 ) 105,116 (2,179 ) Securitized products — — — — — — Other 12,055 (12 ) — — 12,055 (12 ) Total 237,149 (3,242 ) 49,499 (129 ) 286,648 (3,371 ) Yen in millions March 31, 2021 Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized Debt securities: Available-for-sale Japanese national government bonds 485,941 (18,418 ) 29,424 (191 ) 515,365 (18,609 ) Japanese local government bonds 20,421 (8 ) 15,256 (12 ) 35,677 (20 ) Japanese corporate bonds 73,238 (925 ) 42,310 (550 ) 115,548 (1,475 ) Foreign government bonds 128,085 (20,800 ) 1,522 (19 ) 129,607 (20,819 ) Foreign corporate bonds 29,651 (302 ) 12,026 (157 ) 41,677 (459 ) Securitized products — — — — — — Other 1,162 (140 ) — — 1,162 (140 ) Total 738,498 (40,593 ) 100,538 (929 ) 839,036 (41,522 )
Summary of Debt Securities Classified as Held to Maturity by Credit Quality Indicator	These debt securities held primarily in the Financial Services segment are substantially all composed of investment grade securities. Yen in millions March 31 2020 2021 Debt securities: Held-to-maturity AAA 5,516 69,161 AA 1,193,053 1,465,168 A 6,219,943 6,202,576 BBB — — Other — — Total 7,418,512 7,736,905

Leases (Tables)

Leases (Tables)	12 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Components of lease cost	The components of lease cost are as follows: Yen in millions Fiscal year ended March 31 2020 2021 Finance Lease cost Amortization of right-of-use 10,077 7,795 Interest on lease liabilities 1,266 863 Total finance lease cost 11,343 8,658 Operating lease cost 76,863 80,309 Short-term lease cost 20,620 17,805 Variable lease cost 141 108 Sublease income (3,860 ) (2,256 ) Total lease cost 105,107 104,624
Summary of Supplemental consolidated balance sheet information related to leases	Supplemental consolidated balance sheet information related to leases is as follows: Yen in millions March 31 2020 2021 Finance leases Current portion of long-term debt 9,240 7,382 Long-term debt 29,843 43,684 Total finance lease liabilities 39,083 51,066 March 31 2020 2021 Weighted average remaining lease term Operating leases 8.61 years 8.08 years Finance leases 9.91 years 16.85 years March 31 2020 2021 Weighted average discount rate Operating leases 2.338 % 2.119 % Finance leases 3.147 % 1.776 %
Summary of Maturities of Lease Liabilities	Maturities of lease liabilities as of March 31, 2021 are as follows: Yen in millions Fiscal year ending March 31 Operating leases Finance leases 2022 79,980 8,309 2023 65,595 6,909 2024 55,127 5,067 2025 36,893 4,306 2026 29,850 2,941 Later fiscal years 130,838 33,869 Total lease payments 398,283 61,401 Less imputed interest 34,662 10,335 Total 363,621 51,066
Summary of other information related to leases	Other information related to leases is as follows: Yen in millions Fiscal year ended 2020 2021 Cash paid for amounts included in the measurement of lease liabilities Payments for operating leases, included in cash flows from operating activities 71,612 75,907 Payments for finance leases, included in cash flows from financing activities 33,088 9,311 Right-of-use 124,380 46,710

Goodwill and other intangible_2

Goodwill and other intangible assets (Tables)	12 Months Ended
	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Intangible Assets other than Goodwill and Weighted-Average Amortization Period	Intangible assets other than goodwill acquired during the fiscal year ended March 31, 2021 totaled 187,596 million yen, which are subject to amortization, and are comprised of the following: Intangible assets acquired during the fiscal year Weighted-average Yen in millions Years Patent rights, know-how 14,131 5 Software to be sold, leased or otherwise marketed 17,255 3 Internal-use 87,788 5 Music catalogs 61,341 19 Other 7,081 3
Intangible Assets Subject to Amortization	Intangible assets subject to amortization are comprised of the following: Yen in millions March 31, 2020 March 31, 2021 Gross carrying Accumulated Gross carrying Accumulated Patent rights, know-how 173,800 (154,772 ) 180,379 (143,448 ) Customer relationships 16,104 (12,467 ) 18,681 (13,962 ) Trademarks 11,115 (6,079 ) 11,177 (6,394 ) Software to be sold, leased or otherwise marketed 141,111 (110,663 ) 156,820 (124,819 ) Internal-use 594,109 (384,236 ) 660,133 (437,438 ) Music catalogs 612,266 (124,787 ) 708,320 (151,568 ) Artist contracts 41,764 (29,017 ) 42,902 (30,425 ) Television carriage contracts (broadcasting agreements) 53,266 (21,645 ) 55,752 (27,162 ) Other 56,769 (42,631 ) 63,102 (57,001 ) Total 1,700,304 (886,297 ) 1,897,266 (992,217 )
Estimated Aggregate Amortization Expense for Intangible Assets	The estimated aggregate amortization expense for intangible assets for the next five fiscal years is as follows: Fiscal year ending March 31 Yen in millions 2022 102,884 2023 88,057 2024 66,244 2025 48,197 2026 33,799
Total Carrying Amount of Intangible Assets having Indefinite Life	Total carrying amount of intangible assets having an indefinite life is comprised of the following: Yen in millions March 31 2020 2021 Trademarks 69,975 70,265 Distribution agreements 18,834 18,834 Other 3,494 2,157 Total 92,303 91,256
Changes in Carrying Amount of Goodwill by Segment	The changes in the carrying amount of goodwill by segment for the fiscal years ended March 31, 2020 and 2021 are as follows: G&NS Music Pictures EP&S I&SS Financial All Other Total Balance, March 31, 2019: Goodwill — gross 153,955 403,676 252,262 194,416 46,564 7,931 28,570 1,087,374 Accumulated impairments — (306 ) (106,778 ) (182,462 ) — (706 ) (28,570 ) (318,822 ) Goodwill 153,955 403,370 145,484 11,954 46,564 7,225 — 768,552 Increase (decrease) due to: Acquisitions 17,945 2,956 14,889 364 — 3,609 — 39,763 Sales and dispositions — — (609 ) — — — — (609 ) Impairments — — — — — — — — Translation adjustments (926 ) (13,802 ) (5,410 ) (129 ) (372 ) — — (20,639 ) Other — (1,199 ) (1,980 ) — — — — (3,179 ) Balance, March 31, 2020: Goodwill — gross 170,974 391,631 257,074 194,635 46,192 11,540 28,269 1,100,315 Accumulated impairments — (306 ) (104,700 ) (182,446 ) — (706 ) (28,269 ) (316,427 ) Goodwill 170,974 391,325 152,374 12,189 46,192 10,834 — 783,888 Increase (decrease) due to: Acquisitions — 1,791 13,007 5,156 — — — 19,954 Sales and dispositions — (902 ) (392 ) — — — — (1,294 ) Impairments — — — — — — — — Translation adjustments 1,386 16,609 6,026 267 318 — — 24,606 Other — — 1,467 (1,472 ) — — — (5 ) Balance, March 31, 2021: Goodwill — gross 172,360 409,129 278,991 198,600 46,510 11,540 28,526 1,145,656 Accumulated impairments — (306 ) (106,509 ) (182,460 ) — (706 ) (28,526 ) (318,507 ) Goodwill 172,360 408,823 172,482 16,140 46,510 10,834 — 827,149

Insurance-related accounts (Tab

Insurance-related accounts (Tables)	12 Months Ended
	Mar. 31, 2021
Insurance [Abstract]
Policyholders' Account in Life Insurance Business	At March 31, 2020 and 2021, policyholders’ account in the life insurance business is comprised of the following: Yen in millions March 31 2020 2021 Universal life insurance 2,611,577 3,067,791 Investment contracts 885,690 1,103,785 Other 145,004 159,489 Total 3,642,271 4,331,065
Schedule of Net Amount of Risk by Product and Guarantee	The policyholders’ account value, net amount at risk, liability for the minimum guarantee benefit, and average attained age at March 31, 2020 and 2021 are as follows. Yen in millions March 31, 2020 Variable annuities Variable life Total Policyholders’ account value 464,093 1,096,935 1,561,028 Net amount at risk 71,685 4,564,214 4,635,899 Liability for minimum guarantee benefit 64,045 79,860 143,905 Age March 31 2020 Variable annuities Variable life Average attained age 60 45 Yen in millions March 31, 2021 Variable annuities Variable life Total Policyholders’ account value 490,152 1,486,001 1,976,153 Net amount at risk 50,861 5,074,637 5,125,498 Liability for minimum guarantee benefit 42,309 58,246 100,555 Age March 31 2021 Variable annuities Variable life Average attained age 61 45

Short-term borrowings and lon_2

Short-term borrowings and long-term debt (Tables)	12 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Short-Term Borrowings	Short-term borrowings are comprised of the following: Yen in millions March 31 2020 2021 Unsecured loans: with a weighted-average interest rate of 0.86% 91,725 with a weighted-average interest rate of 0.77% 58,659 Repurchase agreement: with a weighted-average interest rate of 0.93% 567,194 with a weighted-average interest rate of 0.06% 917,792 Call money: with a weighted-average interest rate of 0.13% 151,257 with a weighted-average interest rate of -0.03% 211,417 810,176 1,187,868
Long-Term Debt	Long-term debt is comprised of the following: Yen in millions March 31 2020 2021 Unsecured loans, representing obligations principally to banks: Due 2020 to 2029, with interest rates ranging from 0.01 % to 5.10 % per annum 17,880 Due 2021 to 2030, with interest rates ranging from 0.01 % to 5.10 % per annum 238,196 Unsecured 0.23% bonds, due 2021 89,894 89,969 Unsecured 0.11% bonds, due 2022 10,000 10,000 Unsecured 1.41% bonds, due 2022 10,000 10,000 Unsecured 0.28% bonds, due 2023 15,000 15,000 Unsecured 0.13% bonds, due 2024 29,886 29,911 Unsecured 0.15% bonds, due 2024 9,971 Unsecured 0.22% bonds, due 2025 10,000 10,000 Unsecured 0.18% bonds, due 2026 10,000 10,000 Unsecured 0.20% bonds, due 2026 19,943 Unsecured 0.42% bonds, due 2026 24,923 24,935 Unsecured 0.30% bonds, due 2029 59,738 59,760 Unsecured zero coupon convertible bonds, due 2022: Conversion price 4,996.0 yen per common share 119,531 Conversion price 4,982.5 yen per common share 41,189 Secured 0.00% loans, due 2022 to 2023 201,205 Secured 0.00% loans, due 2021 to 2026 240,019 Finance lease liabilities and other: Due 2020 to 2050, with interest rates ranging from 0.01% to 12.59% per annum 56,350 Due 2021 to 2051, with interest rates ranging from 0.01% to 5.45% per annum 85,564 Guarantee deposits received 10,366 10,536 664,773 904,993 Less — Portion due within one year 29,807 131,699 634,966 773,294
Aggregate Amounts of Annual Maturities of Long-Term Debt	Aggregate amounts of annual maturities of long-term debt are as follows: Fiscal year ending March 31 Yen in millions 2022 131,699 2023 106,626 2024 95,016 2025 188,572 2026 26,867 Later fiscal years 356,213 Total 904,993

Housing loans and deposits fr_2

Housing loans and deposits from customers in the banking business (Tables)	12 Months Ended
	Mar. 31, 2021
Banking And Thrifts [Abstract]
Summary of Amortized Cost of Housing Loans in the Banking Business by Both Credit Quality Indicator Based On The Credit Ratings of Debtors and Year of Origination	The following table presents the amortized cost of housing loans in the banking business by credit quality indicator based on the credit ratings of debtors as of March 31, 2020. Yen in millions March 31, 2020 Housing loans by the credit ratings of debtors: Normal* 1,923,648 Other than normal 3,406 Total 1,927,054 * Normal is defined as borrowers who do not have particular problems with their financial position. The following table presents the amortized cost of housing loans in the banking business by both credit quality indicator based on the credit ratings of debtors and year of origination as of March 31, 2021. Yen in millions March 31, 2021 Amortized Cost by Origination Year Fiscal year ended March 31 2021 2020 2019 2018 2017 Prior Total Housing loans by the credit ratings of debtors: Normal* 547,133 349,334 252,609 158,546 269,450 772,072 2,349,144 Other than normal 212 136 358 265 218 4,213 5,402 Total assets 547,345 349,470 252,967 158,811 269,668 776,285 2,354,546 * Normal is defined as borrowers who do not have particular problems with their financial position.
Aggregate Amounts of Annual Maturities of Time Deposits and Thrift Saving Deposits with Remaining Term of More Than One Year	At March 31, 2021, aggregate amounts of annual maturities of time deposits and thrift saving deposits with a remaining term of more than one year are as follows: Fiscal year ending March 31 Yen in millions 2023 36,586 2024 19,643 2025 3,135 2026 3,159 2027 400 Later fiscal years 28,805 Total 91,728

Fair value measurements (Tables

Fair value measurements (Tables)	12 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities Measured on Recurring Basis	The fair value of Sony’s assets and liabilities that are measured at fair value on a recurring basis at March , and are as follows. Yen in millions March 31, 2020 Presentation in the consolidated balance sheets Level 1 Level 2 Level 3 Total Marketable Securities Other Other Assets: Debt securities Trading securities 24,330 245,790 — 270,120 270,120 — — — Available-for-sale Japanese national government bonds — 1,761,929 — 1,761,929 10,011 1,751,918 — — Japanese local government bonds — 69,172 — 69,172 15,334 53,838 — — Japanese corporate bonds — 220,679 30 220,709 14,774 205,935 — — Foreign government bonds *1 — 279,777 — 279,777 2,690 277,087 — — Foreign corporate bonds *2 — 343,980 15,770 359,750 94,156 265,594 — — Securitized products *3 — 33,383 171,840 205,223 — 205,223 — — Other — 4,152 12,101 16,253 — 16,253 — — Equity securities 950,744 581,642 — 1,532,386 1,434,612 97,774 — — Other investments *4 7,162 816 9,242 17,220 — 17,220 — — Derivative assets *5 1,310 41,073 — 42,383 — — 40,784 1,599 Total assets 983,546 3,582,393 208,983 4,774,922 1,841,697 2,890,842 40,784 1,599 Presentation in the consolidated balance sheets Level 1 Level 2 Level 3 Total Future Policyholders’ Other Other Liabilities: Future insurance policy benefits and policyholders’ account in the life insurance business *6 — — 532,191 532,191 64,045 468,146 — — Derivative liabilities *5 2,077 33,789 — 35,866 — — 16,814 19,052 Total liabilities 2,077 33,789 532,191 568,057 64,045 468,146 16,814 19,052 Yen in millions March 31, 2021 Presentation in the consolidated balance sheets Level 1 Level 2 Level 3 Total Marketable Securities Other Other Assets: Debt securities Trading securities 30,164 258,731 — 288,895 288,895 — — — Available-for-sale Japanese national government bonds — 2,443,266 — 2,443,266 394,295 2,048,971 — — Japanese local government bonds — 74,063 — 74,063 29,624 44,439 — — Japanese corporate bonds — 264,644 7,169 271,813 24,980 246,833 — — Foreign government bonds *1 — 325,856 — 325,856 — 325,856 — — Foreign corporate bonds *2 — 365,029 17,845 382,874 117,209 265,665 — — Securitized products *3 — 44,104 154,489 198,593 — 198,593 — — Other — 21,466 24,355 45,821 — 45,821 — — Equity securities 1,757,134 704,214 — 2,461,348 2,044,763 416,585 — — Other investments *4 7,544 4,128 9,326 20,998 — 20,998 — — Derivative assets *5 261 28,476 — 28,737 — — 14,412 14,325 Total assets 1,795,103 4,533,977 213,184 6,542,264 2,899,766 3,613,761 14,412 14,325 Presentation in the consolidated balance sheets Level 1 Level 2 Level 3 Total Future Policyholders’ Other Other Liabilities: Future insurance policy benefits and policyholders’ account in the life insurance business *6 — — 536,189 536,189 42,309 493,880 — — Derivative liabilities *5 1,116 39,238 — 40,354 — — 26,086 14,268 Total liabilities 1,116 39,238 536,189 576,543 42,309 493,880 26,086 14,268 *1 7,771 million yen and 15,654 million yen are included in foreign securities for which the fair value option has been elected and classified in level 2 for the fiscal years ended March 31, 2020 and 2021. In the consolidated balance sheets, 2,386 million yen are included as marketable securities for the fiscal years ended March 31, 2020 and 5,385 million yen and 15,654 million yen are included as securities investment and other for the fiscal years ended March 31, 2020 and 2021, respectively. *2 188,426 million yen and 228,761 million yen are included in foreign securities for which the fair value option has been elected and classified in level 2 for the fiscal years ended March 31, 2020 and 2021, respectively. In the consolidated balance sheets, 34,502 million yen and 52,637 million yen are included as marketable securities and 153,924 million yen and 176,124 million yen are included as securities investment and other for the fiscal years ended March 31, 2020 and 2021, respectively. *3 193,430 million yen and 192,451 million yen are included in foreign securities for which the fair value option has been elected and classified in level 2 and level 3 for the fiscal years ended March 31, 2020 and 2021, respectively, and are included in the consolidated balance sheets as securities investments and other. *4 Other investments include certain hybrid financial instruments and certain private equity investments. *5 Derivative assets and liabilities are recognized and disclosed on a gross basis. *6 Future insurance policy benefits and policyholders’ account in the life insurance business are those for which the fair value option has been elected. 7 Net loss of 12,408 million yen and net gains of 4,645 million yen arising from assets and liabilities for which the fair value option has been elected are included in financial services revenue and financial services expense in the consolidated statements of income for the fiscal years ended March 31, 2020 and 2021, respectively.
Changes in Fair Value of Level Three Assets and Liabilities	The changes in fair value of level 3 assets and liabilities for the fiscal years ended March 31, 2020 and 2021 are as follows: Yen in millions Fiscal year ended March 31, 2020 Assets Liabilities Debt securities Future Available-for-sale Japanese Foreign Securitized Other Other Beginning balance — 22,704 165,083 — 6,918 — Acquisition of AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd. *1 — — — — — 547,190 Total realized and unrealized gains (losses): Included in earnings (loss) *2 — 311 (18,151 ) — (500 ) 12,500 Included in other comprehensive income (loss) *3 — (73 ) 1 — — 3,032 Purchases and Issuances 30 13,597 40,175 12,101 4,711 5,295 Sales — — — — (9 ) — Settlements — (20,867 ) (12,967 ) — (1,878 ) (4,762 ) Transfers into level 3 *4 — 3,374 — — — — Transfers out of level 3 *5 — (3,276 ) (2,301 ) — — — Ending balance 30 15,770 171,840 12,101 9,242 532,191 Changes in unrealized gains (losses) relating to instruments still held at reporting date: Included in earnings (loss) *2 — (94 ) (16,507 ) — (376 ) 10,273 Yen in millions Fiscal year ended March 31, 2021 Assets Liabilities Debt securities Future Available-for-sale Japanese Foreign Securitized Other Other Beginning balance 30 15,770 171,840 12,101 9,242 532,191 Total realized and unrealized gains (losses): Included in earnings (loss)* 2 — 1,465 14,000 5,703 772 (16,475 ) Included in other comprehensive income (loss)* 3 (461 ) 73 — (11 ) — (3,120 ) Purchases and Issuances 7,600 5,441 — 11,215 28 1,996 Sales — — — — (2 ) — Settlements — (7,835 ) (34,488 ) (4,681 ) (825 ) (17,593 ) Other — (1,613 ) 1,014 28 111 Transfers into level 3* 4 — 4,544 2,123 — — — Ending balance 7,169 17,845 154,489 24,355 9,326 536,189 Changes in unrealized gains (losses) Included in earnings (loss)* 2 — 600 17,419 — (77 ) (29,205 ) Included in other comprehensive income (loss)* 3 (461 ) 14 — (17 ) — (3,120 ) *1 Refer to Note 24. *2 Earning effects are included in financial services revenue and financial services expense in the consolidated statements of income. *3 Unrealized gains (losses) are included in unrealized gains (losses) on securities, net for available-for-sale *4 Certain corporate bonds and certain securitized products were transferred into level 3 because differences between the fair value determined by indicative quotes from dealers and the fair value determined by internally developed prices became significant and the observability of the inputs used decreased. *5 Certain corporate bonds and certain securitized products were transferred out of level 3 because observable market data became available.
Assets and Liabilities Remeasured at Fair Value on a Nonrecurring Basis	During the fiscal years ended March 31, 2020 and 2021, such remeasurements to fair value related primarily to the following: During the fiscal year ended March 31, 2020 Estimated fair value Amounts included Level 1 Level 2 Level 3 Assets: Remeasurement of retained investment in SRE 15,911 — — 13,347 Long-lived assets impairments — — 8,155 (36,003 ) (22,656 ) During the fiscal year ended March 31, 2021 Estimated fair value Amounts included Level 1 Level 2 Level 3 Assets: Long-lived assets impairments — — 32,033 (25,685 ) (25,685 )
Estimated Fair Values by Fair Value Hierarchy Level of Certain Financial Instruments not Reported at Fair Value	The estimated fair values by fair value hierarchy level of certain financial instruments that are not reported at fair value are summarized as follows: Yen in millions March 31, 2020 Estimated fair value Carrying Level 1 Level 2 Level 3 Total Total Assets: Housing loans in the banking business — 2,161,432 — 2,161,432 1,927,054 Total assets — 2,161,432 — 2,161,432 1,927,054 Liabilities: Long-term debt including the current portion — 699,358 — 699,358 664,773 Investment contracts included in policyholders’ account in the life insurance business — 969,464 — 969,464 885,690 Total liabilities — 1,668,822 — 1,668,822 1,550,463 Yen in millions March 31, 2021 Estimated fair value Carrying Level 1 Level 2 Level 3 Total Total Assets: Housing loans in the banking business — — 2,559,073 2,559,073 2,354,546 Total assets — — 2,559,073 2,559,073 2,354,546 Liabilities: Long-term debt including the current portion — 911,885 39,989 951,874 904,993 Investment contracts included in policyholders’ account in the life insurance business — 1,159,195 — 1,159,195 1,103,785 Total liabilities — 2,071,080 39,989 2,111,069 2,008,778

Derivative instruments and he_2

Derivative instruments and hedging activities (Tables)	12 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Estimated Fair Values of Outstanding Derivative Instruments	The estimated fair values of Sony’s outstanding derivative instruments are summarized as follows: Derivatives designated as hedging Yen in millions Balance sheet location Fair value Balance sheet location Fair value March 31 March 31 Asset derivatives 2020 2021 Liability derivatives 2020 2021 Interest rate contracts Prepaid expenses and other current assets 9 — Current liabilities: Other 183 286 Interest rate contracts Other assets: Other 27 10,921 Liabilities: Other 8,177 6,064 Foreign exchange contracts Prepaid expenses and other current assets 1,799 8 Current liabilities: Other — 6,000 1,835 10,929 8,360 12,350 Derivatives not designated as Yen in millions Balance sheet location Fair value Balance sheet location Fair value March 31 March 31 Asset derivatives 2020 2021 Liability derivatives 2020 2021 Interest rate contracts Prepaid expenses and other current assets 44 50 Current liabilities: Other 200 408 Interest rate contracts Other assets: Other 1,523 1,817 Liabilities: Other 9,120 8,204 Foreign exchange contracts Prepaid expenses and other current assets 19,655 14,097 Current liabilities: Other 14,580 14,233 Foreign exchange contracts Other assets: Other 49 1,587 Liabilities: Other 1,755 — Equity contracts Prepaid expenses and other current assets 18,886 240 Current liabilities: Other 1,476 5,157 Bond contracts Prepaid expenses and other current assets 306 17 Current liabilities: Other 290 2 Commodity contracts Prepaid expenses and other current assets 85 — Current liabilities: Other 85 0 40,548 17,808 27,506 28,004 Total derivatives 42,383 28,737 35,866 40,354
Effects of Derivative Instruments on Consolidated Statements of Income and Consolidated Statements of Comprehensive Income	Presented below are the effects of derivative instruments on the consolidated statements of income and the consolidated statements of comprehensive income for the fiscal years ended March 31, 2019, 2020 and 2021. Derivatives under fair value hedging relationships Yen in millions Location of gains or (losses) recognized Amounts of gains or (losses) recognized Fiscal year ended March 31 2019 2020 2021 Interest rate contracts Financial services revenue (1,835 ) (3,925 ) (1,189 ) Total (1,835 ) (3,925 ) (1,189 ) Yen in millions Derivatives under cash flow hedging relationships Fiscal year ended March 31 2019 2020 2021 Amounts recognized in unrealized gains (losses) on derivative Interest rate contracts: Components included in — — 10,153 Foreign exchange contracts: Components included in 2,315 1,712 (2,210 ) Components excluded from — 1,087 263 Total 2,315 2,799 8,206 Yen in millions Derivatives under cash flow hedging relationships Affected line item in consolidated statements of income Fiscal year ended March 31 2019 2020 2021 Amounts reclassified from unrealized Interest rate contracts: Components included in Interest — — 285 Foreign exchange contracts: — Components included in Cost of sales (1,093 ) — — Components included in Net sales — 106 (5,382 ) Components excluded from Net sales — (1,087 ) (263 ) Total (1,093 ) (981 ) (5,360 ) Derivatives not designated as Yen in millions Location of gains or (losses) recognized Amounts of gains or (losses) recognized Fiscal year ended March 31 2019 2020 2021 Interest rate contracts Financial services revenue (3,192 ) 1,190 (9,603 ) Foreign exchange contracts Financial services revenue (8,198 ) 2,473 (10,730 ) Foreign exchange contracts Foreign exchange loss, net (7,437 ) 10,184 (8,454 ) Equity contracts Financial services revenue (7,649 ) 15,438 (85,118 ) Bond contracts Financial services revenue — (2,954 ) 99 Commodity contracts Financial services revenue — 110 4,790 Total (26,476 ) 26,441 (109,016 ) Presented below are the amortized cost of hedged items, which are available-for-sale Derivatives under fair value hedging relationships Yen in millions Balance sheet location of March 31, 2020 Amortized cost Cumulative effect to carrying amount of hedged items by fair value hedges Interest rate contracts Marketable securities 15,255 — Interest rate contracts Securities investments and other 91,080 — Total 106,335 — Derivatives under fair value hedging relationships Yen in millions Balance sheet location of March 31, 2021 Amortized cost Cumulative effect to carrying amount of hedged items by fair value hedges Interest rate contracts Marketable securities 30,167 — Interest rate contracts Securities investments and other 74,872 — Total 105,039 —
Summary of Derivatives Additional Information Including Notional Amounts	The following table summarizes additional information, including notional amounts, for each type of derivative: Yen in millions March 31, 2020 March 31, 2021 Notional Fair value Notional Fair value Foreign exchange contracts: Foreign exchange forward contracts* 989,966 3,201 1,176,589 (5,420 ) Currency option contracts purchased 473 7 36,234 15 Currency option contracts written 460 (5 ) 36,164 (1,790 ) Currency swap agreements 893,874 (1,006 ) 612,813 490 Other currency contracts* 62,080 2,971 68,663 2,164 Interest rate contracts: Interest rate swap agreements 994,133 (16,019 ) 979,554 (1,969 ) Interest rate swaption agreements 18,700 (58 ) 38,700 (205 ) Equity contracts: Equity future contracts 63,354 (871 ) 129,526 (746 ) Equity swap agreements 103,409 18,281 117,055 (4,171 ) Bond contracts: Bond future contracts 56,546 16 169,441 15 Commodity contracts: Commodity future contracts 1,465 0 2,957 (0 ) * Revision has been made to correct the notional amount of foreign exchange forward contracts and the presentation of fair values of foreign exchange forward contracts and other currency contracts as of March 31, 2020.
Summary of Effects of Offsetting Derivative Assets, Derivative Liabilities, Financial Assets and Financial Liabilities	Yen in millions As of March 31, 2020 Gross amounts Gross amounts not offset in the Financial Cash collateral Net amounts Derivative assets subject to master netting agreements 38,281 12,614 20,545 5,122 Derivative assets not subject to master netting agreements 4,102 4,102 Total assets 42,383 12,614 20,545 9,224 Derivative liabilities subject to master netting agreements 31,896 7,086 23,873 937 Derivative liabilities not subject to master netting agreements 3,970 3,970 Repurchase, securities lending and similar arrangements 567,194 564,874 — 2,320 Total liabilities 603,060 571,960 23,873 7,227 Yen in millions As of March 31, 2021 Gross amounts Gross amounts not offset in the Financial Cash collateral Net amounts Derivative assets subject to master netting agreements 15,159 10,666 2,008 2,485 Derivative assets not subject to master netting agreements 13,578 13,578 Securities borrowing and securities lending transactions 326,156 326,156 — Total assets 354,893 336,822 2,008 16,063 Derivative liabilities subject to master netting agreements 38,966 11,052 16,225 11,689 Derivative liabilities not subject to master netting agreements 1,388 1,388 Repurchase, securities lending and similar arrangements 917,792 911,881 — 5,911 Total liabilities 958,146 922,933 16,225 18,988

Pension and severance plans (Ta

Pension and severance plans (Tables)	12 Months Ended
	Mar. 31, 2021
Retirement Benefits [Abstract]
Components of Net Periodic Benefit Costs	The components of net periodic benefit costs for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Japanese plans: Yen in millions Fiscal year ended March 31 2019 2020 2021 Service cost 23,128 17,948 12,763 Interest cost 7,020 4,162 3,684 Expected return on plan assets (16,695 ) (17,040 ) (10,802 ) Recognized actuarial loss 15,365 12,969 8,852 Amortization of prior service costs (7,864 ) (4,294 ) (343 ) Losses on curtailments and settlements — 6,358 — Net periodic benefit costs 20,954 20,103 14,154 Foreign plans: Yen in millions Fiscal year ended March 31 2019 2020 2021 Service cost 2,780 3,616 2,767 Interest cost 10,083 9,212 6,509 Expected return on plan assets (11,797 ) (10,916 ) (6,395 ) Recognized actuarial loss 2,656 2,606 3,614 Amortization of prior service costs (269 ) 2 1,058 Losses on curtailments and settlements 1,804 68 2,128 Net periodic benefit costs 5,257 4,588 9,681
Changes in Benefit Obligation and Plan Assets as well as Funded Status and Composition of Amounts Recognized in Consolidated Balance Sheets	The changes in the benefit obligation and plan assets as well as the funded status and composition of amounts recognized in the consolidated balance sheets were as follows: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Change in benefit obligation: Benefit obligation at beginning of the fiscal year 1,034,954 658,863 351,918 359,811 Service cost 17,948 12,763 3,616 2,767 Interest cost 4,162 3,684 9,212 6,509 Plan participants’ contributions — — 487 269 Plan amendments — — 10,210 157 Actuarial (gain) loss (3,330 ) 271 19,776 32,432 Foreign currency exchange rate changes — — (16,919 ) 29,486 Curtailments and settlements (359,205 ) — (4,434 ) (14,587 ) Other 2 43 — — Benefits paid (35,668 ) (35,563 ) (14,055 ) (18,555 ) Benefit obligation at end of the fiscal year 658,863 640,061 359,811 398,289 Change in plan assets: Fair value of plan assets at beginning of the fiscal year 742,204 437,206 274,749 281,110 Actual return on plan assets 2,942 59,536 26,738 (596 ) Foreign currency exchange rate changes — — (14,904 ) 25,433 Employer contribution 7,453 2,333 9,916 38,169 Plan participants’ contributions — — 487 269 Curtailments and settlements (284,333 ) — (3,146 ) (11,927 ) Benefits paid (31,060 ) (22,664 ) (12,730 ) (16,967 ) Fair value of plan assets at end of the fiscal year 437,206 476,411 281,110 315,491 Funded status at end of the fiscal year (221,657 ) (163,650 ) (78,701 ) (82,798 )
Amounts Recognized in Consolidated Balance Sheets	Amounts recognized in the consolidated balance sheets consist of: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Noncurrent assets 3,391 5,746 24,777 13,660 Current liabilities — — (4,355 ) (12,364 ) Noncurrent liabilities (225,048 ) (169,396 ) (99,123 ) (84,094 ) Ending balance (221,657 ) (163,650 ) (78,701 ) (82,798 )
Amounts Recognized in Accumulated Other Comprehensive Income, Excluding Tax Effect	Amounts recognized in accumulated other comprehensive income, excluding tax effects, consist of: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Prior service cost (credit) (369 ) (26 ) 10,058 9,350 Net actuarial loss 223,354 163,401 66,326 102,821 Ending balance 222,985 163,375 76,384 112,171
Accumulated Benefit Obligations for All Defined Benefit Pension Plans	The accumulated benefit obligations for all defined benefit pension plans were as follows: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Accumulated benefit obligations 654,209 635,285 354,100 392,375
Accumulated Benefit Obligations and Fair Value of Plan Assets for Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets	The accumulated benefit obligations and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets were as follows: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Accumulated benefit obligations 640,890 621,296 226,080 200,020 Fair value of plan assets 420,497 456,662 130,955 109,468
Summary of the projected benefit obligations and fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets	The projected benefit obligations and fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets were as follows: Japanese plans Foreign plans Yen in millions Yen in millions March 31 March 31 2020 2021 2020 2021 Projected benefit obligations 645,544 626,057 234,652 205,915 Fair value of plan assets 420,497 456,662 131,546 109,468
Weighted-Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Costs	Weighted-average assumptions used to determine benefit obligations as of March 31, 2020 and 2021 were as follows: Japanese plans Foreign plans March 31 March 31 2020 2021 2020 2021 Discount rate 0.6 % 0.6 % 2.0 % 1.4 % Interest crediting rate 3.4 3.4 4.8 4.8 Rate of compensation increase * * 2.2 2.5 * Substantially all of Sony’s Japanese pension plans were point-based. Point-based plans do not incorporate a measure of compensation rate increases. Weighted-average assumptions used to determine the net periodic benefit costs for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Japanese plans Foreign plans Fiscal year ended March 31 Fiscal year ended March 31 2019 2020 2021 2019 2020 2021 Discount rate 0.8 % 0.6 % 0.6 % 2.9 % 2.8 % 2.0 % Expected return on plan assets 2.6 2.6 2.5 4.4 4.2 2.3 Interest crediting rate 3.5 3.5 3.4 4.8 4.8 4.8 Rate of compensation increase * * * 2.6 2.3 2.2 * Substantially all of Sony’s Japanese pension plans were point-based. Point-based plans do not incorporate a measure of compensation rate increases.
Fair Values of Assets Held by Japanese and Foreign Plans	The fair values of the assets held by Japanese and foreign plans, which are classified in accordance with the fair value hierarchy described in Note 2, are as follows: Japanese plans Yen in millions Fair value at March 31, 2020 Fair value measurements using inputs considered as Asset class Level 1 Level 2 Level 3 Cash and cash equivalents 24,851 24,851 — — Equity: Equity securities *1 50,646 47,308 3,338 — Fixed income: Government bonds *2 107,478 1,087 106,391 — Corporate bonds *3 71,192 20 71,172 — Asset-backed securities *4 1,090 — 1,090 — Commingled funds *5 58,740 — 58,740 — Commodity funds *6 21,823 — 21,823 — Private equity *7 30,191 — — 30,191 Hedge funds *8 48,410 — — 48,410 Real estate and other *9 22,785 — (2,586 ) 25,371 Total 437,206 73,266 259,968 103,972 Japanese plans Yen in millions Fair value at March 31, 2021 Fair value measurements using inputs considered as Asset class Level 1 Level 2 Level 3 Cash and cash equivalents 53,298 53,298 — — Equity: Equity securities *1 63,927 59,946 3,981 — Fixed income: Government bonds *2 116,687 1,149 115,538 — Corporate bonds *3 30,348 19 30,329 — Asset-backed securities *4 1,029 — 1,029 — Commingled funds *5 89,281 — 89,281 — Commodity funds *6 22,283 — 22,283 — Private equity *7 29,153 — — 29,153 Hedge funds *8 47,384 — — 47,384 Real estate and other *9 23,021 — (2,488 ) 25,509 Tota l 476,411 114,412 259,953 102,046 *1 Includes approximately 37 42 63 58 *2 Includes approximately 36 64 *3 Includes debt securities issued by Japanese and foreign corporation and government related agencies. *4 Includes primarily mortgage-backed securities. *5 Commingled funds represent pooled institutional investments, including primarily investment trusts. They include approximately 50 54 45 43 5 3 *6 Represents commodity futures funds. *7 Includes multiple private equity funds of funds that primarily invest in venture, buyout, and distressed markets in the United States and Europe. *8 Includes primarily funds that invest in a portfolio of a broad range of hedge funds to diversify the risks and reduce the volatilities associated with a single hedge fund. *9 Includes primarily private real estate investment trusts. Foreign plans Yen in millions Fair value at March 31, 2020 Fair value measurements using inputs considered as Asset class Level 1 Level 2 Level 3 Cash and cash equivalents 4,632 4,632 — — Equity: Equity securities *1 18,380 17,762 618 — Fixed income: Government bonds *2 93,826 — 93,826 — Corporate bonds *3 31,769 — 31,769 — Asset-backed securities 1,320 — 1,320 — Insurance contracts *4 19,334 — 7,156 12,178 Commingled funds *5 78,280 — 78,280 — Real estate and other *6 33,569 — 11,272 22,297 Total 281,110 22,394 224,241 34,475 Foreign plans Yen in millions Fair value at March 31, 2021 Fair value measurements using inputs considered as Asset class Level 1 Level 2 Level 3 Cash and cash equivalents 5,914 5,914 — — Equity: Equity securities *1 11,349 10,631 718 — Fixed income: Government bonds *2 18,843 — 18,843 — Corporate bonds *3 59,071 — 59,071 — Asset-backed securities 120 — 120 — Insurance contracts *4 156,567 — 7,480 149,087 Commingled funds *5 59,867 — 59,867 — Other 3,760 — 69 3,691 Total 315,491 16,545 146,168 152,778 *1 Includes primarily foreign equity securities. *2 Includes primarily foreign government debt securities. *3 Includes primarily foreign corporate debt securities. *4 Includes annuity contracts with or without profit sharing and bulk insurance contracts. *5 Commingled funds represent pooled institutional investments including mutual funds, common trust funds, and collective investment funds. They are primarily comprised of foreign equities and fixed income investments. *6 Includes primarily private real estate investment trusts.
Summary of Changes in Fair Values of Japanese and Foreign Plans' Level Three Assets	The following table sets forth a summary of changes in the fair values of Japanese and foreign plans’ level 3 assets for the fiscal years ended March 31, 2020 and 2021 : Japanese plans Yen in millions Fair value measurement using significant unobservable inputs Private equity Hedge funds Real estate and other Total Beginning balance at April 1, 2019 27,956 71,606 21,392 120,954 Return on assets held at end of year 2,649 (648 ) 418 2,419 Purchases, sales, and settlements, net (414 ) (22,548 ) 3,561 (19,401 ) Ending balance at March 31, 2020 30,191 48,410 25,371 103,972 Return on assets held at end of year 7,793 4,199 1,558 13,550 Purchases, sales, and settlements, net (1,083 ) (4,182 ) 178 (5,087 ) Transfers, net (7,748 ) (1,043 ) (1,598 ) (10,389 ) Ending balance at March 31, 2021 29,153 47,384 25,509 102,046 Foreign plans Yen in millions Fair value measurement using significant Insurance Real estate and other Total Beginning balance at April 1, 2019 12,494 22,089 34,583 Return on assets held at end of year 559 132 691 Purchases, sales, and settlements, net (373 ) 755 382 Other * (502 ) (679 ) (1,181 ) Ending balance at March 31, 2020 12,178 22,297 34,475 Return on assets held at end of year (3,904 ) (402 ) (4,306 ) Purchases, sales, and settlements, net 139,769 (19,605 ) 120,164 Other * 1,044 1,401 2,445 Ending balance at March 31, 2021 149,087 3,691 152,778
Expected Future Benefit Payments	The expected future benefit payments are as follows: Japanese plans Foreign plans Fiscal year ending March 31 Yen in millions Yen in millions 2022 38,662 106,434 2023 36,885 12,742 2024 38,468 13,063 2025 37,414 13,633 2026 37,947 13,735 2027 — 2031 183,084 76,482
Total Defined Contribution Expenses	Total defined contribution expenses for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Japanese plans 3,353 6,925 10,992 Foreign plans 11,602 10,313 9,639

Stockholders' equity (Tables)

Stockholders' equity (Tables)	12 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Changes in Number of Shares of Common Stock Issued and Outstanding	Changes in the number of shares of common stock issued and outstanding during the fiscal years ended March 31, 2019, 2020 and 2021 have resulted from the following: Number of shares Balance at March 31, 2018 1,266,552,149 Issuance of new shares 149,900 Exercise of stock acquisition rights 4,525,300 Conversion of convertible bonds 2,992 Balance at March 31, 2019 1,271,230,341 Issuance of new shares 184,900 Exercise of stock acquisition rights 2,294,900 Conversion of convertible bonds 86,040 Cancellation of treasury stock (12,737,400 ) Balance at March 31, 2020 1,261,058,781 Balance at March 31, 2021 1,261,058,781
Changes in Accumulated Other Comprehensive Income, Net of Tax	Changes in accumulated other comprehensive income, net of tax, by component for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Yen in millions Unrealized Unrealized Pension liability Foreign Total Balance at March 31, 2018 126,191 (1,242 ) (296,444 ) (445,251 ) (616,746 ) Cumulative effect of ASU (15,526 ) — — — (15,526 ) Other comprehensive income before reclassifications 33,124 2,316 (23,448 ) 10,071 22,063 Amounts reclassified out of accumulated other comprehensive income * 161 (1,093 ) 9,488 (1,627 ) 6,929 Net other comprehensive income 33,285 1,223 (13,960 ) 8,444 28,992 Less: Other comprehensive income attributable to noncontrolling interests 8,915 — 53 (1,578 ) 7,390 Balance at March 31, 2019 135,035 (19 ) (310,457 ) (435,229 ) (610,670 ) Yen in millions Unrealized Unrealized Pension Foreign Debt Total Balance at March 31, 2019 135,035 (19 ) (310,457 ) (435,229 ) — (610,670 ) Other comprehensive income before reclassifications 40,334 1,193 (17,519 ) (75,814 ) 3,032 (48,774 ) Amounts reclassified out of accumulated other comprehensive income * 56 74 92,490 (74 ) — 92,546 Net other comprehensive income 40,390 1,267 74,971 (75,888 ) 3,032 43,772 Less: Other comprehensive income attributable to noncontrolling interests 14,234 — 34 (1,245 ) 1,059 14,082 Balance at March 31, 2020 161,191 1,248 (235,520 ) (509,872 ) 1,973 (580,980 ) Yen in millions Unrealized Unrealized Pension Foreign Debt Total Balance at March 31, 2020 161,191 1,248 (235,520 ) (509,872 ) 1,973 (580,980 ) Other comprehensive income before reclassifications (102,588 ) 5,571 2,358 107,661 (3,081 ) 9,921 Amounts reclassified out of accumulated other comprehensive income * 96 (4,058 ) 10,607 (835 ) (39 ) 5,771 Net other comprehensive income (102,492 ) 1,513 12,965 106,826 (3,120 ) 15,692 Less: Other comprehensive income attributable to noncontrolling interests (11,971 ) — 3 1,183 (583 ) (11,368 ) Transactions with noncontrolling interests shareholders and other 30,635 — (910 ) (300 ) 475 29,900 Balance at March 31, 2021 101,305 2,761 (223,468 ) (404,529 ) (89 ) (524,020 ) * Foreign currency translation adjustments were transferred from accumulated other comprehensive income to net income as a result of a complete or substantially complete liquidation or sale of certain foreign subsidiaries and affiliates.
Reclassifications Out of Accumulated Other Comprehensive Income	Reclassifications out of accumulated other comprehensive income for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Yen in millions Comprehensive income components Amounts reclassified from Affected line items in consolidated statements of income 2019 2020 2021 Unrealized gains (losses) on securities 235 82 130 Financial services revenue Tax expense or (benefit) (74 ) (26 ) (34 ) Net of tax 161 56 96 Unrealized gains (losses) on derivative instruments (1,093 ) — — Cost of sales — 106 (5,382 ) Net sales — — 285 Interest Total before tax (1,093 ) 106 (5,097 ) Tax expense or (benefit) — (32 ) 1,039 Net of tax (1,093 ) 74 (4,058 ) Pension liability adjustment 9,891 92,514 13,181 * Tax expense or (benefit) (403 ) (24 ) (2,574 ) Net of tax 9,488 92,490 10,607 Foreign currency translation adjustments (1,627 ) (74 ) (835 ) Foreign exchange loss, net, other operating (income) expense, net and other income: other Tax expense or (benefit) — — — Net of tax (1,627 ) (74 ) (835 ) Debt valuation adjustments — — (39 ) Financial services expenses Tax expense or (benefit) — — — Net of tax — — (39 ) Total amounts reclassified out of accumulated other comprehensive income, net of tax 6,929 92,546 5,771 * The amortization of pension and postretirement benefit components is included in the computation of net periodic pension cost. Refer to Note 15.
Net Income Attributable to Sony Corporation's Stockholders and Transfers (to) from Noncontrolling Interests	Net income attributable to Sony Group Corporation’s stockholders and transfers (to) from the noncontrolling interests for the fiscal years ended March 31, 2019, 2020 and 2021 were as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Net income attributable to Sony Group Corporation’s stockholders 916,271 582,191 1,171,776 Transfers (to) from the noncontrolling interests: Increase (decrease) in additional paid-in (22,775 ) 16,372 196,002 Change from net income attributable to Sony Group Corporation’s stockholders and transfers (to) from the noncontrolling interests 893,496 598,563 1,367,778

Stock-based compensation plans

Stock-based compensation plans (Tables)	12 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Weighted-Average Assumptions used to Determine Fair Value of Stock Acquisition Rights Granted	The fair value of stock acquisition rights granted on the date of grant and used to recognize compensation expense for the fiscal years ended March 31, 2019, 2020 and 2021 was estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions: Fiscal year ended March 31 2019 2020 2021 Weighted-average assumptions Risk-free interest rate 1.37 % 0.70 % 0.17 % Expected lives 5.98 years 5.73 years 5.41 years Expected volatility * 32.52 % 29.30 % 26.97 % Expected dividends 0.35 % 0.32 % 0.34 % * Expected volatility was based on the historical volatilities of Sony Group Corporation’s common stock over the expected life of the stock acquisition rights.
Summary of Activities Regarding Stock Acquisition Rights Plan	A summary of the activities regarding the stock acquisition rights plan during the fiscal year ended March 31, 2021 is as follows: Fiscal year ended March 31, 2021 Number of Weighted- Weighted- Total intrinsic value Yen Years Yen in millions Outstanding at beginning of the fiscal year 12,876,700 4,982 Granted 4,534,600 9,221 Exercised 3,178,300 3,911 Forfeited or expired 210,600 6,280 Outstanding at end of the fiscal year 14,022,400 6,653 7.80 68,218 Exercisable at end of the fiscal year 5,800,700 4,535 6.34 38,794

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Schedule of Receivables from contracts with customers, Contract Assets and Contract Liabilities	Receivables from contracts with customers, contract assets and contract liabilities are comprised of the following: Yen in millions March 31, 2020 March 31, 2021 Receivables from contracts with customers *1 1,126,597 1,176,828 Contract assets *1 13,985 12,204 Contract liabilities *2 271,286 294,911 *1 Receivables from contracts with customers and contract assets are included in the consolidated balance sheets as “Notes and accounts receivable, trade and contract assets” and “Other”, non-current. *2 Contract liabilities are included in the consolidated balance sheets as “Other”, both current and non-current.
Summary of Remaining Performance Obligations that are Unsatisfied	The following table shows the summary of the transaction prices allocated to remaining performance obligations that are unsatisfied at March 31, 2021, of which more than half are expected to be recognized within one year and substantially all within three years. Yen in millions March 31, 2021 Pictures — Motion Pictures and Television Productions *1 644,569 Pictures — Media Networks 20,346 Music *2 57,904 Others 47,211 *1 For Motion Pictures and Television Productions in the Pictures segment, Sony has included all contracts regardless of duration. *2 Amount included in the Music segment primarily consists of minimum royalty guarantees or fixed fees in contracts related to license revenue for ongoing access to an evolving library of content. These contracts also include the potential for sales-based or usage-based royalties to exceed the minimum guarantees, and these additional royalties are excluded from the amount above, of which substantially all are recognized as revenue within three years.
Schedule of Contract Costs	Contract costs are comprised as follows: Yen in millions March 31, 2020 March 31, 2021 Incremental costs of obtaining a contract 7,464 8,348

Restructuring charges (Tables)

Restructuring charges (Tables)	12 Months Ended
	Mar. 31, 2021
Restructuring and Related Activities [Abstract]
Changes in Accrued Restructuring Charges	The changes in the accrued restructuring charges for the fiscal years ended March 31, 2019, 2020 and 2021 are as follows: Yen in millions Employee Non-cash * Other Total Balance at March 31, 2018 19,486 — 4,188 23,674 Restructuring costs 24,449 2,731 5,825 33,005 Non-cash — (2,731 ) — (2,731 ) Cash payments (19,150 ) — (2,555 ) (21,705 ) Adjustments 955 — (357 ) 598 Balance at March 31, 2019 25,740 — 7,101 32,841 Restructuring costs 22,957 100 1,653 24,710 Non-cash — (100 ) — (100 ) Cash payments (23,385 ) — (6,703 ) (30,088 ) Adjustments (674 ) — (131 ) (805 ) Balance at March 31, 2020 24,638 — 1,920 26,558 Restructuring costs 19,669 2,806 3,240 25,715 Non-cash — (2,806 ) — (2,806 ) Cash payments (24,246 ) — (3,152 ) (27,398 ) Adjustments (891 ) — 144 (747 ) Balance at March 31, 2021 19,170 — 2,152 21,322 * Significant asset impairments excluded from restructuring charges are described in Note 13.
Total Costs Incurred in Connection with Restructuring Programs by Segment	Total costs incurred in connection with these restructuring programs by segment for the fiscal years ended March 31, 2019, 2020 and 2021 are as follows: Yen in millions Fiscal year ended March 31, 2019 Employee Other associated * Total net Depreciation Total Game & Network Services — — — — — Music 2,991 201 3,192 — 3,192 Pictures 4,795 — 4,795 — 4,795 Electronics Products & Solutions 11,437 4,574 16,011 86 16,097 Imaging & Sensing Solutions — — — — — Financial Services — — — — — All Other and Corporate 5,226 3,781 9,007 — 9,007 Total 24,449 8,556 33,005 86 33,091 Yen in millions Fiscal year ended March 31, 2020 Employee Other associated * Total net Depreciation Total Game & Network Services — — — — — Music 3,179 6 3,185 — 3,185 Pictures 545 — 545 — 545 Electronics Products & Solutions 14,500 227 14,727 — 14,727 Imaging & Sensing Solutions — — — — — Financial Services — — — — — All Other and Corporate 4,733 1,520 6,253 256 6,509 Total 22,957 1,753 24,710 256 24,966 Yen in millions Fiscal year ended March 31, 2021 Employee Other associated * Total net Depreciation Total Game & Network Services 3,524 553 4,077 13 4,090 Music (1,139 ) 96 (1,043 ) — (1,043 ) Pictures 1,519 54 1,573 — 1,573 Electronics Products & Solutions 11,466 4,205 15,671 — 15,671 Imaging & Sensing Solutions 1,362 — 1,362 — 1,362 Financial Services — — — — — All Other and Corporate 2,937 1,138 4,075 148 4,223 Total 19,669 6,046 25,715 161 25,876 * Other associated costs includes non-cash

Supplemental consolidated sta_2

Supplemental consolidated statements of income information (Tables)	12 Months Ended
	Mar. 31, 2021
Other Income and Expenses [Abstract]
Components of Other Operating (Income) Expense, Net	Other operating (income) expense, net is comprised of the following: Yen in millions March 31 2019 2020 2021 Gain on remeasurement of EMI shares *1 (116,939 ) — — Gain on remeasurement and sale of SRE shares *2 — (17,266 ) — Gain on remeasurement of AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd. shares *3 — (1,827 ) — (Gain) loss on purchase/sale of interests in subsidiaries and affiliates, net (1,557 ) (12,801 ) (16,895 ) (Gain) loss on sale, disposal or impairment of assets, net* 4 46,928 29,778 23,835 Other — (1,495 ) 528 (71,568 ) (3,611 ) 7,468 *1 Refer to Notes 5 and 24. *2 Refer to Note 5. *3 Refer to Notes 5 and 24. *4 Refer to Notes 9, 13 and 19.

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Components of Domestic and Foreign Income and Provision for Current and Deferred Income Taxes	Domestic and foreign components of income before income taxes and the provision for current and deferred income taxes attributable to such income are summarized as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Income before income taxes: Sony Group Corporation and all subsidiaries in Japan 310,020 466,253 488,738 Foreign subsidiaries 701,628 333,197 703,632 1,011,648 799,450 1,192,370 Income taxes — Current: Sony Group Corporation and all subsidiaries in Japan 82,081 105,755 81,706 Foreign subsidiaries 84,667 66,636 72,716 166,748 172,391 154,422 Income taxes — Deferred: Sony Group Corporation and all subsidiaries in Japan 17,907 9,421 (172,095 ) Foreign subsidiaries (139,557 ) (4,622 ) 18,668 (121,650 ) 4,799 (153,427 ) Total income tax expense 45,098 177,190 995
Reconciliation of Statutory Tax Rate and Effective Tax Rate	A reconciliation of the differences between the Japanese statutory tax rate and the effective tax rate is as follows: Fiscal year ended March 31 2019 2020 2021 Statutory tax rate 31.5 % 31.5 % 31.5 % Non-deductible 0.7 0.3 0.1 Income tax credits (1.6 ) (1.7 ) (1.2 ) Change in statutory tax rate and law (0.3 ) (0.4 ) (0.1 ) Change in valuation allowances (other than the reversal of valuation allowance in U.S. and Japan national tax below) 2.3 (8.1 ) (5.0 ) The reversal of valuation allowances in the U.S. (15.3 ) — (5.5 ) The reversal of valuation allowances relating to the national tax of Sony Group Corporation and its national tax filing group in Japan — — (18.0 ) Change in deferred tax liabilities on undistributed earnings of foreign subsidiaries and corporate joint ventures (0.1 ) 0.2 0.7 Lower tax rate applied to life and non-life (0.5 ) (0.6 ) (0.4 ) Foreign income tax differential (6.4 ) (2.4 ) (5.0 ) Adjustments to tax reserves (0.3 ) 0.9 (0.3 ) The remeasurement gain for the equity interest in EMI (2.4 ) — — Japan controlled foreign company taxation 0.0 5.3 2.5 Other (3.1 ) (2.8 ) 0.8 Effective income tax rat e 4.5 % 22.2 % 0.1 %
Components of Deferred Tax Assets and Liabilities	The significant components of deferred tax assets and liabilities are as follows: Yen in millions March 31 2020 2021 Deferred tax assets: Operating loss carryforwards for tax purposes 348,714 302,647 Accrued pension and severance costs 77,559 59,608 Amortization including film costs 65,349 45,506 Lease liabilities 100,720 91,186 Warranty reserves and accrued expenses 116,234 138,413 Future insurance policy benefits 42,056 44,023 Inventories 15,512 28,086 Depreciation 39,085 45,096 Tax credit carryforwards 94,900 63,590 Loss on equity securities 11,815 — Allowance for credit losses 9,090 7,958 Impairment of investments 6,029 1,821 Deferred revenue 24,420 24,502 Other 122,591 167,255 Gross deferred tax assets 1,074,074 1,019,691 Less: Valuation allowance (608,243 ) (276,382 ) Total deferred tax assets 465,831 743,309 Deferred tax liabilities: Insurance acquisition costs (170,868 ) (187,155 ) Future insurance policy benefits (193,315 ) (196,045 ) Unbilled accounts receivable in the Pictures segment (26,214 ) (7,894 ) Right-of-use (96,970 ) (85,244 ) Unrealized gains on securities (92,791 ) (51,147 ) Gain on equity securities — (109,218 ) Intangible assets acquired through stock exchange offerings (23,949 ) (23,949 ) Intangible assets derived from EMI Music Publishing acquisition (89,909 ) (93,481 ) Undistributed earnings of foreign subsidiaries and corporate joint ventures (25,359 ) (41,515 ) Investment in M3 (38,303 ) (41,347 ) Other (47,319 ) (65,605 ) Gross deferred tax liabilities (804,997 ) (902,600 ) Net deferred tax liabilities (339,166 ) (159,291 )
Reconciliation of Beginning and Ending Gross Amounts of Unrecognized Tax Benefits	A reconciliation of the beginning and ending gross amounts of unrecognized tax benefits is as follows: Yen in millions March 31 2019 2020 2021 Balance at beginning of the fiscal year 95,425 50,577 41,268 Reductions for tax positions of prior years (31,396 ) (331 ) (761 ) Additions for tax positions of prior years 3,094 162 52 Additions based on tax positions related to the current year 2,594 8,074 8,267 Settlements (4,235 ) (13,240 ) (4,467 ) Lapse in statute of limitations (14,824 ) (1,251 ) (1,095 ) Foreign currency translation adjustments (81 ) (2,723 ) 2,476 Balance at end of the fiscal year 50,577 41,268 45,740 Total net amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate 35,004 29,539 33,126

Reconciliation of the differe_2

Reconciliation of the differences between basic and diluted EPS (Tables)	12 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Reconciliation of Differences between Basic and Diluted EPS	Reconciliation of the differences between basic and diluted EPS for the fiscal years ended March 31, 2019, 2020 and 2021 is as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Net income attributable to Sony Group Corporation’s stockholders for basic and diluted EPS computation 916,271 582,191 1,171,776 Thousands of shares Weighted-average shares outstanding 1,266,592 1,234,408 1,230,480 Effect of dilutive securities: Stock acquisition rights 4,088 3,853 4,820 Zero coupon convertible bonds 23,966 23,994 15,392 Weighted-average shares for diluted EPS computation 1,294,646 1,262,255 1,250,692 Yen Basic EPS 723.41 471.64 952.29 Diluted EPS 707.74 461.23 936.90 Potential shares of common stock which were excluded from the computation of diluted EPS for the fiscal years ended March 31, 2019 and 2020 were 5,731 thousand shares, 3,212 thousand shares, respectively. Potential shares of common stock were not excluded from the computation of diluted EPS for the fiscal year ended March 31, 2021. Potential shares related to stock acquisition rights were excluded as anti-dilutive for the fiscal years ended March 31, 2019 and 2020 when the exercise price for those shares was in excess of the average market value of Sony’s common stock for those fiscal years. The zero coupon convertible if-converted method upon

Variable interest entities (Tab

Variable interest entities (Tables)	12 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of the Carrying Value of the Variable Interests	Yen in millions March 31, 2020 Presentation in the consolidated balance Maximum Marketable securities Securities investments and other Prepaid Equity securities *1 579,773 6,229 — 587,602 Securitized products — 210,641 — 210,641 Foreign corporate bonds *2 41,452 41,036 — 82,488 Other investments — 16,253 21,000 43,719 Total 621,225 274,159 21,000 924,450 Yen in millions March 31, 2021 Presentation in the consolidated balance Maximum Marketable securities Securities investments and other Prepaid Equity securities *1 681,201 6,698 — 688,428 Securitized products — 270,818 — 270,818 Foreign corporate bonds *2 49,011 31,026 — 80,037 Other investments 101 42,525 21,000 83,659 Total 730,313 351,067 21,000 1,122,942 *1 Equity securities include Investment funds. *2 Foreign corporate bonds include repackaged bonds.

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Mar. 31, 2021
Business Acquisition [Line Items]
Summary of Purchase Price Allocation	The following table summarizes the preliminary and final fair values assigned to the assets and liabilities of EMI that were recorded in the Music segment. Certain areas of the purchase price allocation were not yet finalized as of the fiscal year ended March 31, 2019, including the valuation of income taxes and residual goodwill. Yen in millions Acquired assets (Preliminary) Measurement Acquired assets (Final) Cash and cash equivalents 12,971 12,971 Notes and accounts receivable, trade and contract assets 32,287 32,287 Prepaid expenses and other current assets 10,220 (98 ) 10,122 Securities investments and other 1,476 1,476 Intangibles, net 420,534 420,534 Goodwill 237,271 (1,206 ) 236,065 Other 10,023 10,023 Total assets 724,782 (1,304 ) 723,478 Notes and accounts payable, trade 1,731 1,731 Accounts payable, other and accrued expenses 70,675 70,675 Accrued income and other taxes 3,082 (69 ) 3,013 Long-term debt 148,621 148,621 Accrued pension and severance costs 1,947 1,947 Deferred income taxes 94,849 (1,235 ) 93,614 Other 5,564 5,564 Total liabilities 326,469 (1,304 ) 325,165
Unaudited Supplemental Pro Forma Financial Information	The following unaudited supplemental pro forma financial information presents the combined results of operations of Sony and EMI as though the acquisition had occurred as of the beginning of the fiscal year ended March 31, 2018: Yen in millions, Yen per share amounts Fiscal year ended March 31 2019 Net sales 8,738,209 Operating income 801,973 Net income attributable to Sony Group Corporation’s stockholders 817,629 Per share data: — Basic EPS 645.53 — Diluted EPS 631.55
Acquisition of equity interests in joint ventures in the life insurance business
Business Acquisition [Line Items]
Summary of Purchase Price Allocation	The following table summarizes the fair values assigned to the assets and liabilities of the JVs that were recorded in the Financial Services segment. Yen in millions Cash and cash equivalents 27,380 Marketable securities 530,851 Prepaid expenses and other current assets 21,933 Securities investments and other 15,329 Goodwill 3,609 Other 406 Total assets 599,508 Future insurance policy benefits and other 66,599 Policyholders’ account in the life insurance business 495,248 Other 4,979 Total liabilities 566,826

Commitments, contingent liabi_2

Commitments, contingent liabilities and other (Tables)	12 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of Aggregate Amounts of Year-by-Year Payment of Purchase Commitments	The schedule of the aggregate amounts of year-by-year Fiscal year ending March 31 Yen in millions 2022 519,953 2023 112,975 2024 66,939 2025 53,358 2026 13,786 Later fiscal years 44,389 Total 811,400
Changes in Product Warranty Liability	The changes in the product warranty liability for the fiscal years ended March 31, 2019, 2020 and 2021 are as follows: Yen in millions Fiscal year ended March 31 2019 2020 2021 Balance at beginning of the fiscal year 44,717 33,005 31,807 Additional liabilities for warranties 23,041 21,448 19,560 Settlements (in cash or in kind) (26,326 ) (21,491 ) (19,666 ) Changes in estimate for pre-existing (7,370 ) (562 ) (860 ) Translation adjustments (1,057 ) (593 ) 2,010 Balance at end of the fiscal year 33,005 31,807 32,851

Business segment information (T

Business segment information (Tables)	12 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Components of Segment Sales and Operating Revenue	Segment sales and operating revenue: Yen in millions Fiscal year ended March 31 2019 2020 2021 Sales and operating revenue: Game & Network Services — Customers 2,224,622 1,919,760 2,604,713 Intersegment 86,250 57,791 51,565 Total 2,310,872 1,977,551 2,656,278 Music — Customers 795,025 838,592 927,250 Intersegment 12,464 11,317 12,617 Total 807,489 849,909 939,867 Pictures — Customers 985,270 1,010,714 757,580 Intersegment 1,603 1,140 1,187 Total 986,873 1,011,854 758,767 Electronics Products & Solutions — Customers 2,303,167 1,969,880 1,902,887 Intersegment 17,461 21,388 17,843 Total 2,320,628 1,991,268 1,920,730 Imaging & Sensing Solutions — Customers 770,622 985,259 937,859 Intersegment 108,708 85,317 74,638 Total 879,330 1,070,576 1,012,497 Financial Services — Customers 1,274,708 1,299,847 1,661,520 Intersegment 7,831 7,901 7,401 Total 1,282,539 1,307,748 1,668,921 All Other — Customers 299,806 214,999 196,517 Intersegment 45,931 36,421 32,736 Total 345,737 251,420 229,253 Corporate and elimination (267,781 ) (200,441 ) (186,953 ) Consolidated total 8,665,687 8,259,885 8,999,360
Components of Segment Profit or Loss	Segment profit or loss: Yen in millions Fiscal year ended March 31 2019 2020 2021 Operating income (loss): Game & Network Services 311,092 238,400 342,192 Music 232,487 142,345 188,056 Pictures 54,599 68,157 80,478 Electronics Products & Solutions 76,508 87,276 139,180 Imaging & Sensing Solutions 143,874 235,584 145,876 Financial Services 161,477 129,597 164,582 All Other (11,127 ) 16,288 11,368 Total 968,910 917,647 1,071,732 Corporate and elimination (74,675 ) (72,188 ) (99,867 ) Consolidated operating income 894,235 845,459 971,865 Other income 144,735 21,949 264,235 Other expenses (27,322 ) (67,958 ) (43,730 ) Consolidated income before income taxes 1,011,648 799,450 1,192,370
Components of Other Significant Items	Other significant items: Yen in millions Fiscal year ended March 31 2019 2020 2021 Equity in net income (loss) of affiliated companies: Game & Network Services — — — Music (6,915 ) 4,239 570 Pictures 106 (629 ) 123 Electronics Products & Solutions (38 ) 136 (36 ) Imaging & Sensing Solutions — 0 (123 ) Financial Services (682 ) (104 ) — All Other 4,530 5,995 10,953 Consolidated total (2,999 ) 9,637 11,487 Depreciation and amortization: Game & Network Services 29,023 29,135 38,707 Music 21,259 29,137 30,666 Pictures 24,081 21,665 19,330 Electronics Products & Solutions 61,749 63,291 62,145 Imaging & Sensing Solutions 110,746 134,035 152,380 Financial Services, including deferred insurance acquisition costs 91,179 106,667 59,885 All Other 4,940 5,095 4,363 Total 342,977 389,025 367,476 Corporate 31,049 27,617 23,217 Consolidated total 374,026 416,642 390,693
Sales and Operating Revenue to External Customers by Product Category	The following table is a breakdown of sales and operating revenue to external customers by product category for each segment. Sony management views each segment as a single operating segment. Yen in millions Fiscal year ended March 31 2019 2020 2021 Sales and operating revenue: Game & Network Services Digital Software and Add-on 1,102,231 1,010,296 1,454,654 Network Services 326,524 337,265 382,950 Hardware and Others 795,867 572,199 767,109 Total 2,224,622 1,919,760 2,604,713 Music Recorded Music — Streaming 227,513 276,039 337,100 Recorded Music — Others 199,413 191,114 179,167 Music Publishing 106,666 157,478 156,862 Visual Media and Platform 261,433 213,961 254,121 Total 795,025 838,592 927,250 Pictures Motion Pictures 436,017 475,061 271,081 Television Productions 288,816 301,224 267,123 Media Networks 260,437 234,429 219,376 Total 985,270 1,010,714 757,580 Electronics Products & Solutions Televisions 788,423 646,513 709,007 Audio and Video 362,580 346,060 313,975 Still and Video Cameras 421,506 384,142 338,694 Mobile Communications 487,330 362,144 358,580 Other 243,328 231,021 182,631 Total 2,303,167 1,969,880 1,902,887 Imaging & Sensing Solutions 770,622 985,259 937,859 Financial Services 1,274,708 1,299,847 1,661,520 All Other 299,806 214,999 196,517 Corporate 12,467 20,834 11,034 Consolidated total 8,665,687 8,259,885 8,999,360
Sales and Operating Revenue Attributed to Countries and Areas Based on Location of External Customers and Long-Lived Assets	Sales and operating revenue attributed to countries and areas based on location of external customers for the fiscal years ended March 31, 2019, 2020 and 2021 and property, plant and equipment, net and right-of-use Yen in millions Fiscal year ended March 31 2019 2020 2021 Sales and operating revenue: Japan 2,591,784 2,472,479 2,962,465 United States 1,982,135 1,864,390 2,153,466 Europe 1,862,166 1,697,791 1,816,244 China 770,416 845,235 762,766 Asia-Pacific 912,193 892,026 861,623 Other Areas 546,993 487,964 442,796 Total 8,665,687 8,259,885 8,999,360 Yen in millions March 31 2020 2021 Property, plant and equipment, net and right-of-use Japan 946,922 999,280 United States 214,226 211,109 Europe 67,799 74,313 China 17,996 16,976 Asia-Pacific 46,932 48,515 Other Areas 7,379 12,335 Total 1,301,254 1,362,528

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2021
Software to be sold, leased or otherwise marketed
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets	3 years
Minimum | Buildings
Summary Of Significant Accounting Policies [Line Items]
Useful lives for depreciation	2 years
Minimum | Machinery, equipment and others
Summary Of Significant Accounting Policies [Line Items]
Useful lives for depreciation	2 years
Minimum | Patent rights; know-how; license agreements; trademarks; software to be sold, leased or otherwise marketed, and internal-use software
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets	3 years
Minimum | Customer relationships, music catalogs, artist contracts and television carriage contracts (broadcasting agreements)
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets	10 years
Maximum | Buildings
Summary Of Significant Accounting Policies [Line Items]
Useful lives for depreciation	50 years
Maximum | Machinery, equipment and others
Summary Of Significant Accounting Policies [Line Items]
Useful lives for depreciation	10 years
Maximum | Patent rights; know-how; license agreements; trademarks; software to be sold, leased or otherwise marketed, and internal-use software
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets	10 years
Maximum | Customer relationships, music catalogs, artist contracts and television carriage contracts (broadcasting agreements)
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets	44 years

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Schedule of New Accounting Pronouncement Balance Sheet (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2021	Apr. 01, 2020		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Current assets:
Notes and accounts receivable, trade and contract assets		¥ 1,099,300	¥ 1,028,793		¥ 1,028,793
Allowance for credit losses		(29,406)	(26,153)	[1]	(25,873)
Inventories		637,391	558,452		589,969
Other receivables		283,499	188,076		188,106
Prepaid expenses and other current assets		538,540	594,009		594,021
Total current assets		7,218,744	5,703,306		5,735,145
Film costs		459,426	458,853		427,336
Investments and advances:
Securities investments and other		14,046,196	12,526,990		12,526,210
Allowance for credit losses		(8,419)	(6,341)
Long-term Investments, Total		14,263,995	12,728,571		12,734,132
Other assets:
Deferred income taxes		207,470	210,417		210,372
Other		361,803	339,284		340,005
Other noncurrent assets		3,427,241	3,233,410		3,234,086
Total assets		26,354,840	23,032,784		23,039,343
Current liabilities:
Deferred income taxes		366,761	548,034		549,538
Total liabilities		20,725,185	18,240,537		18,242,041
EQUITY
Retained earnings		3,857,152	2,765,187		2,768,856
Stockholders' Equity Attributable to Parent, Total		5,575,839	4,121,637		4,125,306
Noncontrolling interests		45,637	662,843		664,229
Total equity		5,621,476	4,784,480		4,789,535	¥ 4,436,690	¥ 3,647,157
Total liabilities and equity		¥ 26,354,840	¥ 23,032,784		23,039,343
As previously reported
Current assets:
Notes and accounts receivable, trade and contract assets					1,028,793
Allowance for credit losses	[1]				(25,873)
Inventories					589,969
Other receivables					188,106
Prepaid expenses and other current assets					594,021
Total current assets					5,735,145
Film costs					427,336
Investments and advances:
Securities investments and other					12,526,210
Long-term Investments, Total					12,734,132
Other assets:
Deferred income taxes					210,372
Other					340,005
Other noncurrent assets					3,234,086
Total assets					23,039,343
Current liabilities:
Deferred income taxes					549,538
Total liabilities					18,242,041
EQUITY
Retained earnings					2,768,856
Stockholders' Equity Attributable to Parent, Total					4,125,306
Noncontrolling interests					664,229
Total equity					4,789,535
Total liabilities and equity					23,039,343
Accounting Standards Update, Adjustment
Current assets:
Allowance for credit losses	[1]				(280)
Inventories					(31,517)
Other receivables					(30)
Prepaid expenses and other current assets					(12)
Total current assets					(31,839)
Film costs					31,517
Investments and advances:
Securities investments and other					780
Allowance for credit losses					(6,341)
Long-term Investments, Total					(5,561)
Other assets:
Deferred income taxes					45
Other					(721)
Other noncurrent assets					(676)
Total assets					(6,559)
Current liabilities:
Deferred income taxes					(1,504)
Total liabilities					(1,504)
EQUITY
Retained earnings					(3,669)
Stockholders' Equity Attributable to Parent, Total					(3,669)
Noncontrolling interests					(1,386)
Total equity					(5,055)
Total liabilities and equity					(6,559)
Accounting Standards Update 2016-13
Current assets:
Allowance for credit losses	[1]				(280)
Other receivables					(30)
Prepaid expenses and other current assets					(12)
Total current assets					(322)
Investments and advances:
Securities investments and other					780
Allowance for credit losses					(6,341)
Long-term Investments, Total					(5,561)
Other assets:
Deferred income taxes					45
Other					(721)
Other noncurrent assets					(676)
Total assets					(6,559)
Current liabilities:
Deferred income taxes					(1,504)
Total liabilities					(1,504)
EQUITY
Retained earnings					(3,669)
Stockholders' Equity Attributable to Parent, Total					(3,669)
Noncontrolling interests					(1,386)
Total equity					(5,055)
Total liabilities and equity					(6,559)
Accounting Standards Update 2019-02
Current assets:
Inventories					(31,517)
Total current assets					(31,517)
Film costs					¥ 31,517
[1]	Under ASU 2016-13, Sony changed the presentation from “Allowance for doubtful accounts” to “Allowance for credit losses” on the consolidated balance sheets.

Inventories (Summary of Invento

Inventories (Summary of Inventories) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Apr. 01, 2020	Mar. 31, 2020
Inventory Disclosure [Abstract]
Finished products	¥ 398,478		¥ 345,231
Work in process	133,560		149,969
Raw materials, purchased components and supplies	105,353		94,769
Inventories	¥ 637,391	¥ 558,452	¥ 589,969

Film Costs (Summary of Film Cos

Film Costs (Summary of Film Costs) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2021	Apr. 01, 2020	Mar. 31, 2020
Motion picture productions:
Released		¥ 68,302		¥ 99,482
Completed and not released		20,148		18,776
In production and development		141,268		67,199
Television productions:
Released		126,236		186,344
In production and development		33,712		25,093
Film costs for content predominantly monetized individually		389,666		396,894
Film costs for Media Networks content	[1]	69,760		61,959
Less: current portion of broadcasting rights included in inventories	[2]			(31,517)
Film costs		¥ 459,426	¥ 458,853	¥ 427,336
[1]	Substantially all of Sony’s film costs for Media Networks content are broadcasting rights and predominantly monetized with other content.
[2]	Sony adopted ASU 2019-02 from April 1, 2020, and as a result, broadcasting rights in the Pictures segment and animation film production costs in the Music segment were reclassified from inventories to film costs.

Film Costs - Additional Informa

Film Costs - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Film Costs [Abstract]
Percentage of unamortized film costs	67.00%
Accrued participation liabilities expected to be paid in next twelve months	¥ 167,000
Amortization of film costs monetized individually	209,674	¥ 276,902
Amortization of film costs monetized as a film group	¥ 63,370	¥ 52,907

Film Costs (Summary of Unamorti

Film Costs (Summary of Unamortized Film Costs) (Detail)	Mar. 31, 2021
Film costs for released content predominantly monetized individually
Entertainment Industry [Line Items]
2022	77.00%
2023	11.00%
2024	3.00%
Total	91.00%
Film costs for Media Networks content
Entertainment Industry [Line Items]
2022	42.00%
2023	24.00%
2024	14.00%
Total	80.00%

Investments in Affiliated Com_3

Investments in Affiliated Companies (Summarized Combined Financial Information Provided by Equity Investees) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Apr. 01, 2020	Jan. 29, 2020	Dec. 31, 2019	Dec. 19, 2019
Schedule of Equity Method Investments [Line Items]
Current assets	¥ 7,218,744	¥ 5,735,145		¥ 5,703,306
Noncurrent assets	172,795	164,852
Current liabilities	7,815,424	6,240,443
Noncurrent liabilities and noncontrolling interests	61,232	60,469
Percentage of ownership in equity investees					50.00%	44.50%	56.30%
Net income attributable to controlling interests	1,191,375	622,260	¥ 966,550
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	435,910	389,195
Current liabilities	208,306	194,219
Net revenues	414,934	387,678	390,457
Operating income	78,096	58,431	53,920
Net income attributable to controlling interests	¥ 46,914	¥ 34,916	¥ 5,539
Minimum
Schedule of Equity Method Investments [Line Items]
Percentage of ownership in equity investees	20.00%	20.00%	20.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Percentage of ownership in equity investees	50.00%	50.00%	50.00%

Investments in Affiliated Com_4

Investments in Affiliated Companies - Additional Information (Detail) ¥ in Millions	12 Months Ended
	Mar. 31, 2021JPY (¥)Entity	Mar. 31, 2020JPY (¥)Entity	Mar. 31, 2019JPY (¥)	Jan. 29, 2020	Dec. 31, 2019	Dec. 19, 2019	Nov. 14, 2018	Apr. 01, 2015
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest				50.00%	44.50%	56.30%
Gain Loss on remeasurement or sale of shares		¥ 17,266
Aggregate carrying value of investments in several affiliated companies	¥ 150,339
Fair value of investments in several affiliated companies	¥ 1,785,481
Number of affiliated companies accounted for under the equity method | Entity	135	140
Dividends received from affiliated companies	¥ 6,539	¥ 4,523	¥ 4,948
DH Publishing, L.P.
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest							60.00%
Sony Life Insurance Co Ltd
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest				50.00%
SA Reinsurance Ltd
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest				50.00%
M3, Inc.
Schedule of Equity Method Investments [Line Items]
Difference between carrying value and underlying net assets	¥ 65,541
Difference between carrying value and underlying net assets, accounting treatment for amounts allocated to intangible assets	The amounts allocated to intangible assets are amortized net of the related tax effects to equity in net income (loss) of affiliated companies over their respective estimated useful lives, principally 10 years, using the straight-line method.
SFI Leasing Company, Limited
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest	34.00%
MITSUI-SOKO Supply Chain Solutions, Inc
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest								34.00%
MITSUI-SOKO Supply Chain Solutions, Inc | General and Administrative Expenses
Schedule of Equity Method Investments [Line Items]
Related party transaction, amounts of transaction	¥ 7,139	6,069
MITSUI-SOKO Supply Chain Solutions, Inc | Accrued Expenses
Schedule of Equity Method Investments [Line Items]
Related party transaction, account balances	¥ 1,649	¥ 1,181

Investments in Affiliated Com_5

Investments in Affiliated Companies (Account Balances and Transactions with Affiliated Companies Accounted for under Equity Method) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Schedule of Equity Method Investments [Line Items]
Short-term borrowings	¥ 1,187,868	¥ 810,176
Finance lease liabilities and other	51,066	39,083
Operating lease liabilities	363,621
Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Accounts receivable, trade	5,814	12,030
Other receivables	3,014	1,589
Other current assets	16,097	9,757
Accounts payable, trade	1,409	1,497
Short-term borrowings	21,367	31,557
Finance lease liabilities and other	48,018	34,564
Operating lease liabilities	2,730	2,393
Sales	32,372	35,951	¥ 41,437
Purchases	¥ 3,058	¥ 3,479	¥ 5,584

Transfer of Financial Assets -

Transfer of Financial Assets - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Transfers and Servicing [Abstract]
Trade accounts receivable sold	¥ 36,664	¥ 65,214	¥ 81,947

Marketable Securities and Sec_3

Marketable Securities and Securities Investments (Aggregate Cost, Gross Unrealized Gains and Losses and Fair Value Pertaining to Available-for-Sale Securities and Held-to-Maturity Securities) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Schedule of Investments [Line Items]
Held-to-maturity securities, Cost	¥ 7,736,905	¥ 7,418,512
Held-to-maturity securities, Gross unrealized gains	1,738,553	2,462,696
Held-to-maturity securities, Gross unrealized losses	(53,699)	(6,572)
Held-to-maturity securities, Fair value	9,421,759	9,874,636
Marketable securities and securities investments, Cost	11,319,671	10,021,664
Marketable securities and securities investments, Gross unrealized gains	1,939,595	2,775,728
Marketable securities and securities investments, Gross unrealized losses	(95,221)	(9,943)
Marketable securities and securities investments, Fair value	13,164,045	12,787,449
Debt securities
Schedule of Investments [Line Items]
Available-for-Sale securities, Cost	3,582,766	2,603,152
Available-for-Sale securities, Gross unrealized gains	201,042	313,032
Available-for-Sale securities, Gross unrealized losses	(41,522)	(3,371)
Available-for-Sale securities, Fair value	3,742,286	2,912,813
Japanese national government bonds
Schedule of Investments [Line Items]
Held-to-maturity securities, Cost	6,244,125	6,204,505
Held-to-maturity securities, Gross unrealized gains	1,650,057	2,098,885
Held-to-maturity securities, Gross unrealized losses	(13,390)	(1,397)
Held-to-maturity securities, Fair value	7,880,792	8,301,993
Japanese national government bonds | Debt securities
Schedule of Investments [Line Items]
Available-for-Sale securities, Cost	2,301,995	1,552,036
Available-for-Sale securities, Gross unrealized gains	159,880	210,459
Available-for-Sale securities, Gross unrealized losses	(18,609)	(566)
Available-for-Sale securities, Fair value	2,443,266	1,761,929
Japanese local government bonds
Schedule of Investments [Line Items]
Held-to-maturity securities, Cost	1,716	2,504
Held-to-maturity securities, Gross unrealized gains	294	331
Held-to-maturity securities, Fair value	2,010	2,835
Japanese local government bonds | Debt securities
Schedule of Investments [Line Items]
Available-for-Sale securities, Cost	73,989	69,132
Available-for-Sale securities, Gross unrealized gains	94	73
Available-for-Sale securities, Gross unrealized losses	(20)	(33)
Available-for-Sale securities, Fair value	74,063	69,172
Japanese corporate bonds
Schedule of Investments [Line Items]
Held-to-maturity securities, Cost	543,870	482,050
Held-to-maturity securities, Gross unrealized gains	36,071	61,176
Held-to-maturity securities, Gross unrealized losses	(14,919)	(4,754)
Held-to-maturity securities, Fair value	565,022	538,472
Japanese corporate bonds | Debt securities
Schedule of Investments [Line Items]
Available-for-Sale securities, Cost	259,932	202,164
Available-for-Sale securities, Gross unrealized gains	13,356	19,112
Available-for-Sale securities, Gross unrealized losses	(1,475)	(567)
Available-for-Sale securities, Fair value	271,813	220,709
Foreign government bonds
Schedule of Investments [Line Items]
Held-to-maturity securities, Cost	850,740	723,937
Held-to-maturity securities, Gross unrealized gains	51,494	302,297
Held-to-maturity securities, Gross unrealized losses	(25,277)
Held-to-maturity securities, Fair value	876,957	1,026,234
Foreign government bonds | Debt securities
Schedule of Investments [Line Items]
Available-for-Sale securities, Cost	323,557	198,777
Available-for-Sale securities, Gross unrealized gains	23,118	81,014
Available-for-Sale securities, Gross unrealized losses	(20,819)	(14)
Available-for-Sale securities, Fair value	325,856	279,777
Foreign corporate bonds
Schedule of Investments [Line Items]
Held-to-maturity securities, Cost	27,392	98
Held-to-maturity securities, Gross unrealized gains	572	7
Held-to-maturity securities, Gross unrealized losses	(109)
Held-to-maturity securities, Fair value	27,855	105
Foreign corporate bonds | Debt securities
Schedule of Investments [Line Items]
Available-for-Sale securities, Cost	382,231	361,422
Available-for-Sale securities, Gross unrealized gains	1,102	507
Available-for-Sale securities, Gross unrealized losses	(459)	(2,179)
Available-for-Sale securities, Fair value	382,874	359,750
Securitized products
Schedule of Investments [Line Items]
Held-to-maturity securities, Cost	69,062	5,418
Held-to-maturity securities, Gross unrealized gains	65
Held-to-maturity securities, Gross unrealized losses	(4)	(421)
Held-to-maturity securities, Fair value	69,123	4,997
Securitized products | Debt securities
Schedule of Investments [Line Items]
Available-for-Sale securities, Cost	198,593	205,223
Available-for-Sale securities, Gross unrealized gains		0
Available-for-Sale securities, Fair value	198,593	205,223
Other
Schedule of Investments [Line Items]
Available-for-Sale securities, Cost	42,469	14,398
Available-for-Sale securities, Gross unrealized gains	3,492	1,867
Available-for-Sale securities, Gross unrealized losses	(140)	(12)
Available-for-Sale securities, Fair value	¥ 45,821	¥ 16,253

Marketable Securities and Sec_4

Marketable Securities and Securities Investments (Cost and Fair Value of Debt Securities Classified as Available-for-Sale Securities and Held-to-Maturity Securities by Contractual Maturity) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Available for Sale Securities, Cost
Due in one year or less	¥ 568,574
Due after one year through five years	419,311
Due after five years through ten years	650,929
Due after ten years	1,943,952
Total	3,582,766
Available-for-sale securities, Fair value
Due in one year or less	568,625
Due after one year through five years	434,470
Due after five years through ten years	725,747
Due after ten years	2,013,444
Total	3,742,286
Held-to-maturity securities, Cost
Due in one year or less	6,680
Due after one year through five years	288,952
Due after five years through ten years	252,897
Due after ten years	7,188,376
Held-to-maturity securities, Cost	7,736,905	¥ 7,418,512
Held-to-maturity securities, Fair value
Due in one year or less	6,757
Due after one year through five years	307,127
Due after five years through ten years	284,725
Due after ten years	8,823,150
Total	¥ 9,421,759	¥ 9,874,636

Marketable Securities and Sec_5

Marketable Securities and Securities Investments - Additional Information (Detail) ¥ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021JPY (¥)	Mar. 31, 2021USD ($)	Mar. 31, 2020JPY (¥)	Mar. 31, 2020USD ($)	Mar. 31, 2019JPY (¥)	Mar. 31, 2019USD ($)	Mar. 31, 2019USD ($)	Apr. 03, 2018
Investment Holdings [Line Items]
Proceeds from sales of available-for-sale securities	¥ 60,188		¥ 84,362		¥ 66,906
Gross realized gains from available-for-sale securities	358		354		240
Gross realized losses from available-for-sale securities	145		128		475
Marketable securities classified as trading securities	288,895		270,120
Net unrealized gains on trading securities			1,705		3,610
Net unrealized losses on trading securities	(1,055)
Net realized gains on sale of equity securities	44,372		20,176
Net unrealized gains on revaluation of equity securities	682,650		134,831
Gain or loss on sale of shares in security investments	61,544
Investment in non public companies	82,744		30,120
Equity securities without readily determinable fair value, downward price adjustment	4,826		9,075		4,285
Equity securities without readily determinable fair value, upward price adjustment	20,921		1,070
Spotify Technology SA
Investment Holdings [Line Items]
Ownership percentage								5.707%
Proceed from sale of shares					82,616	$ (768)
Gain or loss on sale of shares in security investments	0		0		54,179	(504)
Gross fair value of retained shares					78,947		$ 711
Gain (loss) on equity securities, net	¥ (51,310)	$ (480)	¥ (6,063)	$ 57	¥ 47,543	$ (449)

Marketable Securities and Sec_6

Marketable Securities and Securities Investments (Gross Unrealized Losses and Fair Value of Securities with Unrealized Losses, Aggregated by Investment Category and Length of Time of Continuous Unrealized Loss Position) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Investments, Unrealized Loss Position [Line Items]
Available-for-sale securities, less than 12 months, fair value	¥ 738,498	¥ 237,149
Available-for-sale securities, less than 12 months, unrealized losses	(40,593)	(3,242)
Available-for-sale securities, 12 months or more, fair value	100,538	49,499
Available-for-sale securities, 12 months or more, unrealized losses	(929)	(129)
Available-for-sale securities, fair value, total	839,036	286,648
Available-for-sale securities, unrealized losses, total	(41,522)	(3,371)
Japanese national government bonds
Investments, Unrealized Loss Position [Line Items]
Available-for-sale securities, less than 12 months, fair value	485,941	51,746
Available-for-sale securities, less than 12 months, unrealized losses	(18,418)	(539)
Available-for-sale securities, 12 months or more, fair value	29,424	2,032
Available-for-sale securities, 12 months or more, unrealized losses	(191)	(27)
Available-for-sale securities, fair value, total	515,365	53,778
Available-for-sale securities, unrealized losses, total	(18,609)	(566)
Japanese local government bonds
Investments, Unrealized Loss Position [Line Items]
Available-for-sale securities, less than 12 months, fair value	20,421	25,010
Available-for-sale securities, less than 12 months, unrealized losses	(8)	(10)
Available-for-sale securities, 12 months or more, fair value	15,256	16,340
Available-for-sale securities, 12 months or more, unrealized losses	(12)	(23)
Available-for-sale securities, fair value, total	35,677	41,350
Available-for-sale securities, unrealized losses, total	(20)	(33)
Japanese corporate bonds
Investments, Unrealized Loss Position [Line Items]
Available-for-sale securities, less than 12 months, fair value	73,238	62,118
Available-for-sale securities, less than 12 months, unrealized losses	(925)	(548)
Available-for-sale securities, 12 months or more, fair value	42,310	10,694
Available-for-sale securities, 12 months or more, unrealized losses	(550)	(19)
Available-for-sale securities, fair value, total	115,548	72,812
Available-for-sale securities, unrealized losses, total	(1,475)	(567)
Foreign government bonds
Investments, Unrealized Loss Position [Line Items]
Available-for-sale securities, less than 12 months, fair value	128,085
Available-for-sale securities, less than 12 months, unrealized losses	(20,800)
Available-for-sale securities, 12 months or more, fair value	1,522	1,537
Available-for-sale securities, 12 months or more, unrealized losses	(19)	(14)
Available-for-sale securities, fair value, total	129,607	1,537
Available-for-sale securities, unrealized losses, total	(20,819)	(14)
Foreign corporate bonds
Investments, Unrealized Loss Position [Line Items]
Available-for-sale securities, less than 12 months, fair value	29,651	86,220
Available-for-sale securities, less than 12 months, unrealized losses	(302)	(2,133)
Available-for-sale securities, 12 months or more, fair value	12,026	18,896
Available-for-sale securities, 12 months or more, unrealized losses	(157)	(46)
Available-for-sale securities, fair value, total	41,677	105,116
Available-for-sale securities, unrealized losses, total	(459)	(2,179)
Other
Investments, Unrealized Loss Position [Line Items]
Available-for-sale securities, less than 12 months, fair value	1,162	12,055
Available-for-sale securities, less than 12 months, unrealized losses	(140)	(12)
Available-for-sale securities, fair value, total	1,162	12,055
Available-for-sale securities, unrealized losses, total	¥ (140)	¥ (12)

Marketable Securities and Sec_7

Marketable Securities and Securities Investments (Summary of Debt Securities Classified as Held to Maturity by Credit Quality Indicator) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	¥ 7,736,905	¥ 7,418,512
AAA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	69,161	5,516
AA
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	1,465,168	1,193,053
A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Held-to-maturity securities	¥ 6,202,576	¥ 6,219,943

Leases-Components of lease cost

Leases-Components of lease cost (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Lease, Cost [Abstract]
Amortization of right-of-use assets	¥ 7,795	¥ 10,077
Interest on lease liabilities	863	1,266
Total finance lease cost	8,658	11,343
Operating lease cost	80,309	76,863
Short-term lease cost	17,805	20,620
Variable lease cost	108	141
Sublease income	(2,256)	(3,860)
Total lease cost	¥ 104,624	¥ 105,107

Leases-Summary of Supplemental

Leases-Summary of Supplemental consolidated balance sheet information related to leases (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Finance Lease [Abstract]
Current portion of long-term debt	¥ 7,382	¥ 9,240
Long-term debt	43,684	29,843
Total	¥ 51,066	¥ 39,083
Weighted average remaining lease term
Operating leases	8 years 29 days	8 years 7 months 9 days
Finance leases	16 years 10 months 6 days	9 years 10 months 28 days
Weighted average discount rate
Operating leases	2.119%	2.338%
Finance leases	1.776%	3.147%

Leases-Summary of Maturities of

Leases-Summary of Maturities of Lease Liabilities (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Operating Leases [Abstract]
2022	¥ 79,980
2023	65,595
2024	55,127
2025	36,893
2026	29,850
Later fiscal years	130,838
Total lease payments	398,283
Less imputed interest	34,662
Total	363,621
Finance Leases [Abstract]
2022	8,309
2023	6,909
2024	5,067
2025	4,306
2026	2,941
Later fiscal years	33,869
Total lease payments	61,401
Less imputed interest	10,335
Total	¥ 51,066	¥ 39,083

Leases-Summary of other informa

Leases-Summary of other information related to leases (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities
Payments for operating leases, included in cash flows from operating activities	¥ 75,907	¥ 71,612
Payments for finance leases, included in cash flows from financing activities	9,311	33,088
Right-of-use assets obtained in exchange for new operating lease liabilities	¥ 46,710	¥ 124,380

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Line Items]
Finite and indefinite lived intangible assets acquired	¥ 187,596
Aggregate amortization expense for intangible assets	¥ 118,260	¥ 110,819	¥ 109,452

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Acquired Intangible Assets and Weighted-Average Amortization Period) (Detail) ¥ in Millions	12 Months Ended
	Mar. 31, 2021JPY (¥)
Patent rights, know-how and license agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	¥ 14,131
Weighted-average amortization period	5 years
Software to be sold, leased or otherwise marketed
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	¥ 17,255
Weighted-average amortization period	3 years
Internal-use software
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	¥ 87,788
Weighted-average amortization period	5 years
Music catalogs
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	¥ 61,341
Weighted-average amortization period	19 years
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	¥ 7,081
Weighted-average amortization period	3 years

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Intangible Assets Subject to Amortization) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	¥ 1,897,266	¥ 1,700,304
Accumulated amortization	(992,217)	(886,297)
Patent rights, know-how and license agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	180,379	173,800
Accumulated amortization	(143,448)	(154,772)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	18,681	16,104
Accumulated amortization	(13,962)	(12,467)
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	11,177	11,115
Accumulated amortization	(6,394)	(6,079)
Software to be sold, leased or otherwise marketed
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	156,820	141,111
Accumulated amortization	(124,819)	(110,663)
Internal-use software
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	660,133	594,109
Accumulated amortization	(437,438)	(384,236)
Music catalogs
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	708,320	612,266
Accumulated amortization	(151,568)	(124,787)
Artist contracts
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	42,902	41,764
Accumulated amortization	(30,425)	(29,017)
Television carriage contracts (broadcasting agreements)
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	55,752	53,266
Accumulated amortization	(27,162)	(21,645)
Other
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	63,102	56,769
Accumulated amortization	¥ (57,001)	¥ (42,631)

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets (Estimated Aggregate Amortization Expense for Intangible Assets) (Detail) ¥ in Millions	Mar. 31, 2021JPY (¥)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2022	¥ 102,884
2023	88,057
2024	66,244
2025	48,197
2026	¥ 33,799

Goodwill and Other Intangible_7

Goodwill and Other Intangible Assets (Total Carrying Amount of Intangible Assets Having Indefinite Life) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Indefinite-lived Intangible Assets [Line Items]
Carrying amount of intangible assets having an indefinite life	¥ 91,256	¥ 92,303
Trademarks
Indefinite-lived Intangible Assets [Line Items]
Carrying amount of intangible assets having an indefinite life	70,265	69,975
Distribution agreements
Indefinite-lived Intangible Assets [Line Items]
Carrying amount of intangible assets having an indefinite life	18,834	18,834
Other
Indefinite-lived Intangible Assets [Line Items]
Carrying amount of intangible assets having an indefinite life	¥ 2,157	¥ 3,494

Goodwill and Other Intangible_8

Goodwill and Other Intangible Assets (Changes in Carrying Amount of Goodwill by Segment) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Goodwill [Line Items]
Goodwill - gross		¥ 1,100,315	¥ 1,087,374
Accumulated impairments		(316,427)	(318,822)
Goodwill		783,888	768,552
Increase (decrease) due to:
Acquisitions	[1]	19,954	39,763
Sales and dispositions		(1,294)	(609)
Translation adjustments		24,606	(20,639)
Other		(5)	(3,179)
Goodwill - gross		1,145,656	1,100,315
Accumulated impairments		(318,507)	(316,427)
Goodwill		827,149	783,888
Game & Network Services
Goodwill [Line Items]
Goodwill - gross		170,974	153,955
Goodwill		170,974	153,955
Increase (decrease) due to:
Acquisitions	[1]		17,945
Translation adjustments		1,386	(926)
Goodwill - gross		172,360	170,974
Goodwill		172,360	170,974
Music
Goodwill [Line Items]
Goodwill - gross		391,631	403,676
Accumulated impairments		(306)	(306)
Goodwill		391,325	403,370
Increase (decrease) due to:
Acquisitions	[1]	1,791	2,956
Sales and dispositions		(902)
Translation adjustments		16,609	(13,802)
Other			(1,199)
Goodwill - gross		409,129	391,631
Accumulated impairments		(306)	(306)
Goodwill		408,823	391,325
Pictures
Goodwill [Line Items]
Goodwill - gross		257,074	252,262
Accumulated impairments		(104,700)	(106,778)
Goodwill		152,374	145,484
Increase (decrease) due to:
Acquisitions	[1]	13,007	14,889
Sales and dispositions		(392)	(609)
Translation adjustments		6,026	(5,410)
Other		1,467	(1,980)
Goodwill - gross		278,991	257,074
Accumulated impairments		(106,509)	(104,700)
Goodwill		172,482	152,374
Electronics Products & Solutions
Goodwill [Line Items]
Goodwill - gross		194,635	194,416
Accumulated impairments		(182,446)	(182,462)
Goodwill		12,189	11,954
Increase (decrease) due to:
Acquisitions	[1]	5,156	364
Translation adjustments		267	(129)
Other		(1,472)
Goodwill - gross		198,600	194,635
Accumulated impairments		(182,460)	(182,446)
Goodwill		16,140	12,189
Imaging & Sensing Solutions
Goodwill [Line Items]
Goodwill - gross		46,192	46,564
Goodwill		46,192	46,564
Increase (decrease) due to:
Translation adjustments		318	(372)
Goodwill - gross		46,510	46,192
Goodwill		46,510	46,192
Financial Services
Goodwill [Line Items]
Goodwill - gross		11,540	7,931
Accumulated impairments		(706)	(706)
Goodwill		10,834	7,225
Increase (decrease) due to:
Acquisitions	[1]		3,609
Goodwill - gross		11,540	11,540
Accumulated impairments		(706)	(706)
Goodwill		10,834	10,834
All Other
Goodwill [Line Items]
Goodwill - gross		28,269	28,570
Accumulated impairments		(28,269)	(28,570)
Increase (decrease) due to:
Goodwill - gross		28,526	28,269
Accumulated impairments		¥ (28,526)	¥ (28,269)
[1]	Acquisitions for the fiscal year ended March 31, 2021 primarily related to the acquisition of PureFlix in the Pictures segment. Refer to Note 25.

Insurance-Related Accounts - Ad

Insurance-Related Accounts - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Liability for Future Policy Benefit, by Product Segment [Line Items]
Combined amounts of statutory net equity of insurance subsidiaries which is not measured in accordance with U.S. GAAP	¥ 573,430	¥ 586,983
Life insurance revenues	913,361	1,052,316	¥ 910,011
Non-life insurance revenues	123,574	115,730	111,392
Amortization of deferred insurance acquisition costs charged to income	44,738	93,734	¥ 79,906
Future insurance policy benefits	6,592,763	6,237,048
Nontraditional Life Insurance Contracts [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Deferred insurance acquisition costs of non-traditional life insurance contracts	¥ 253,687	¥ 206,363
Minimum
Liability for Future Policy Benefit, by Product Segment [Line Items]
Interest rates for future policy benefit based on market conditions and expected investment returns	0.50%
Minimum | Interest Sensitive Whole Life Contracts
Liability for Future Policy Benefit, by Product Segment [Line Items]
Credited interest rates associated with policyholder contract deposits	1.70%
Minimum | Investments Contracts
Liability for Future Policy Benefit, by Product Segment [Line Items]
Credited interest rates associated with policyholder contract deposits	0.01%
Maximum
Liability for Future Policy Benefit, by Product Segment [Line Items]
Interest rates for future policy benefit based on market conditions and expected investment returns	4.50%
Maximum | Interest Sensitive Whole Life Contracts
Liability for Future Policy Benefit, by Product Segment [Line Items]
Credited interest rates associated with policyholder contract deposits	2.00%
Maximum | Investments Contracts
Liability for Future Policy Benefit, by Product Segment [Line Items]
Credited interest rates associated with policyholder contract deposits	6.30%

Insurance-Related Accounts (Pol

Insurance-Related Accounts (Policyholders' Account in Life Insurance Business) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Policyholders Account In Life Insurance Business [Abstract]
Policyholders' account in the life insurance business	¥ 4,331,065	¥ 3,642,271
Universal Life Insurance
Policyholders Account In Life Insurance Business [Abstract]
Policyholders' account in the life insurance business	3,067,791	2,611,577
Investments Contracts
Policyholders Account In Life Insurance Business [Abstract]
Policyholders' account in the life insurance business	1,103,785	885,690
Other
Policyholders Account In Life Insurance Business [Abstract]
Policyholders' account in the life insurance business	¥ 159,489	¥ 145,004

Insurance-Related Accounts (Net

Insurance-Related Accounts (Net Amount at Risk, Liability for the Minimum Guaranteed Benefit) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder's account value	¥ 1,976,153	¥ 1,561,028
Net amount at risk	5,125,498	4,635,899
Liability for minimum guarantee benefit	100,555	143,905
Variable annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder's account value	490,152	464,093
Net amount at risk	50,861	71,685
Liability for minimum guarantee benefit	¥ 42,309	¥ 64,045
Average attained age	61 years	60 years
Variable life insurance contracts
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder's account value	¥ 1,486,001	¥ 1,096,935
Net amount at risk	5,074,637	4,564,214
Liability for minimum guarantee benefit	¥ 58,246	¥ 79,860
Average attained age	45 years	45 years

Short-Term Borrowings and Lon_3

Short-Term Borrowings and Long-Term Debt (Short-Term Borrowings) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Short-term Debt [Line Items]
Short-term borrowings	¥ 1,187,868	¥ 810,176
Unsecured Loans Weighted Average Interest Rate 0.86%
Short-term Debt [Line Items]
Short-term borrowings		91,725
Unsecured Loans Weighted Average Interest Rate 0.77%
Short-term Debt [Line Items]
Short-term borrowings	58,659
Repurchase agreement, weighted average interest rate 0.93%
Short-term Debt [Line Items]
Short-term borrowings		567,194
Repurchase agreement, weighted average interest rate 0.06%
Short-term Debt [Line Items]
Short-term borrowings	917,792
Call Money Weighted Average Interest Rate 0.13%
Short-term Debt [Line Items]
Short-term borrowings		¥ 151,257
Call Money Weighted Average Interest Rate -0.03%
Short-term Debt [Line Items]
Short-term borrowings	¥ 211,417

Short-Term Borrowings and Lon_4

Short-Term Borrowings and Long-Term Debt (Short-Term Borrowings) (Parenthetical) (Detail)	Mar. 31, 2021	Mar. 31, 2020
Unsecured Loans Weighted Average Interest Rate 0.86%
Short-term Debt [Line Items]
Debt weighted-average interest rate		0.86%
Unsecured Loans Weighted Average Interest Rate 0.77%
Short-term Debt [Line Items]
Debt weighted-average interest rate	0.77%
Repurchase agreement, weighted average interest rate 0.93%
Short-term Debt [Line Items]
Debt weighted-average interest rate		0.93%
Repurchase agreement, weighted average interest rate 0.06%
Short-term Debt [Line Items]
Debt weighted-average interest rate	0.06%
Call Money Weighted Average Interest Rate 0.13%
Short-term Debt [Line Items]
Debt weighted-average interest rate		0.13%
Call Money Weighted Average Interest Rate -0.03%
Short-term Debt [Line Items]
Debt weighted-average interest rate	(0.03%)

Short-Term Borrowings and Lon_5

Short-Term Borrowings and Long-Term Debt - Additional Information (Detail) ¥ / shares in Units, ¥ in Millions, $ in Billions	Oct. 31, 2020JPY (¥)	Jul. 31, 2020JPY (¥)	Jul. 21, 2015JPY (¥)TradingDay¥ / shares	Mar. 31, 2021JPY (¥)¥ / shares	May 10, 2021¥ / shares	Jul. 31, 2020USD ($)	Mar. 31, 2020JPY (¥)¥ / shares
Debt Instrument [Line Items]
Short-term borrowings				¥ 1,187,868			¥ 810,176
Long-term debt including current portion				904,993			664,773
Aggregate principal amount newly issued for repayment of borrowings and debt | $						$ 2
JBIC Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount newly issued for repayment of borrowings and debt | $						1.2
Percentage of debt borrowed in USD		60.00%
Japanese Private Banks [Member]
Debt Instrument [Line Items]
Aggregate principal amount newly issued for repayment of borrowings and debt		¥ 86,000				$ 0.8
Percentage of debt borrowed in JPY		40.00%
DH Publishing, LP [Member]
Debt Instrument [Line Items]
Percentage of equity interest acquired		60.00%				60.00%
Sony Financial Holdings Inc [Member]
Debt Instrument [Line Items]
Borrowing from bank	¥ 74,000	¥ 322,500		396,500
Repaid outstanding balance				396,500
Securities Pledged As Collaterals
Debt Instrument [Line Items]
Marketable securities pledged as collateral				54,624
Pledged housing loans, book value				562,731
Long-term secured loan				240,000
Investments Pledged As Collaterals
Debt Instrument [Line Items]
Marketable securities pledged as collateral				326,156
Investments Pledged As Collaterals | Other Current Liabilities
Debt Instrument [Line Items]
Short-term borrowings				373,274
Minimum
Debt Instrument [Line Items]
Long-term Debt, Term		8 years				8 years
Maximum
Debt Instrument [Line Items]
Long-term Debt, Term		10 years				10 years
Committed Lines of Credit
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity				¥ 580,453
Line of credit facility, period up to which company can borrow				180 days
Commercial Paper Programs
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity				¥ 1,053,550
Line of credit facility, period up to which company can borrow				270 days
Cash settlements, variation margins of futures markets and certain other purposes
Debt Instrument [Line Items]
Marketable securities and securities investments pledged as collateral, book value				¥ 12,769
Repurchase agreement, weighted average interest rate of 0.06%
Debt Instrument [Line Items]
Short-term borrowings				917,792
Marketable securities pledged as collateral				787,977
Repurchase agreement, weighted average interest rate of 0.06% | Securities Pledged As Collaterals
Debt Instrument [Line Items]
Short-term borrowings				917,792
Call Money Weighted Average Interest Rate -0.03%
Debt Instrument [Line Items]
Short-term borrowings				211,417
Call Money Weighted Average Interest Rate -0.03% | Securities Pledged As Collaterals
Debt Instrument [Line Items]
Short-term borrowings				59,500
Marketable securities and securities investments pledged as collateral, book value				68,863
Unsecured zero coupon convertible bonds, due 2022
Debt Instrument [Line Items]
Long-term debt including current portion			¥ 120,000	¥ 41,189			¥ 119,531
Debt instrument interest rate			130.00%
Stock acquisition rights, start date			Sep. 1, 2015
Stock acquisition rights, end date			Sep. 28, 2022
Conversion price per common share | ¥ / shares			¥ 5,008	¥ 4,982.5	¥ 4,969.2		¥ 4,996
Amount in excess of dividends for which conversion price is adjusted | ¥ / shares			¥ 25
Debt instrument outstanding percentage			100.00%
Debt instrument redeemable date			Jul. 21, 2020
Debt instrument conversion price percentage on consecutive trading days			130.00%
Debt instrument, convertible, consecutive trading days | TradingDay			20
Basis for conversion bonds outstanding				If each of the closing sales prices per share of Sony Group Corporation’s common stock on the Tokyo Stock Exchange for 20 consecutive trading days is 130% or more of the conversion price of the Zero Coupon Convertible Bonds applicable on those trading days, subject to a public announcement of specified information within 15 days from the last day of those trading days
Unsecured zero coupon convertible bonds, due 2022 | Minimum
Debt Instrument [Line Items]
Conversion price per common share | ¥ / shares			¥ 3,526.5
Amount in excess of dividends for which conversion price is adjusted | ¥ / shares							25
Unsecured zero coupon convertible bonds, due 2022 | Maximum
Debt Instrument [Line Items]
Conversion price per common share | ¥ / shares			¥ 5,008
Amount in excess of dividends for which conversion price is adjusted | ¥ / shares							¥ 55

Short-Term Borrowings and Lon_6

Short-Term Borrowings and Long-Term Debt (Long-Term Debt) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020	Jul. 21, 2015
Debt Instrument [Line Items]
Long-term debt including current portion	¥ 904,993	¥ 664,773
Less - Portion due within one year	131,699	29,807
Total	773,294	634,966
Unsecured loans, due 2020 to 2029, with interest rates ranging from 0.01 % to 5.10 % per annum
Debt Instrument [Line Items]
Long-term debt including current portion		17,880
Unsecured loans, due 2021 to 2030, with interest rates ranging from 0.01 % to 5.10 % per annum
Debt Instrument [Line Items]
Long-term debt including current portion	238,196
Unsecured 0.23% bonds, due 2021
Debt Instrument [Line Items]
Long-term debt including current portion	89,969	89,894
Unsecured 0.11% bonds, due 2022
Debt Instrument [Line Items]
Long-term debt including current portion	10,000	10,000
Unsecured 1.41% bonds, due 2022
Debt Instrument [Line Items]
Long-term debt including current portion	10,000	10,000
Unsecured 0.28% bonds, due 2023
Debt Instrument [Line Items]
Long-term debt including current portion	15,000	15,000
Unsecured 0.13% bonds, due 2024
Debt Instrument [Line Items]
Long-term debt including current portion	29,911	29,886
Unsecured 0.15% bonds, due 2024
Debt Instrument [Line Items]
Long-term debt including current portion	9,971
Unsecured 0.22% bonds, due 2025
Debt Instrument [Line Items]
Long-term debt including current portion	10,000	10,000
Unsecured 0.18% bonds, due 2026
Debt Instrument [Line Items]
Long-term debt including current portion	10,000	10,000
Unsecured 0.20% bonds, due 2026
Debt Instrument [Line Items]
Long-term debt including current portion	19,943
Unsecured 0.30% bonds, due 2029
Debt Instrument [Line Items]
Long-term debt including current portion	59,760	59,738
Unsecured 0.42% bonds, due 2026
Debt Instrument [Line Items]
Long-term debt including current portion	24,935	24,923
Unsecured zero coupon convertible bonds, due 2022
Debt Instrument [Line Items]
Long-term debt including current portion	41,189	119,531	¥ 120,000
Secured 0.00% loans, due 2022 to 2023
Debt Instrument [Line Items]
Long-term debt including current portion		201,205
Secured 0.00% loans, due 2021 to 2026
Debt Instrument [Line Items]
Long-term debt including current portion	240,019
Finance lease liabilities and other, due 2020 to 2050
Debt Instrument [Line Items]
Long-term debt including current portion		56,350
Finance lease liabilities and other, due 2021 to 2051
Debt Instrument [Line Items]
Long-term debt including current portion	85,564
Guarantee deposits received
Debt Instrument [Line Items]
Long-term debt including current portion	¥ 10,536	¥ 10,366

Short-Term Borrowings and Lon_7

Short-Term Borrowings and Long-Term Debt (Long-Term Debt) (Parenthetical) (Detail) - ¥ / shares	May 10, 2021	Mar. 31, 2021	Mar. 31, 2020	Jul. 21, 2015
Unsecured loans, due 2020 to 2029, with interest rates ranging from 0.01 % to 5.10 % per annum | Minimum
Debt Instrument [Line Items]
Debt instrument interest rate			0.01%
Unsecured loans, due 2020 to 2029, with interest rates ranging from 0.01 % to 5.10 % per annum | Maximum
Debt Instrument [Line Items]
Debt instrument interest rate			5.10%
Unsecured loans, due 2021 to 2030, with interest rates ranging from 0.01 % to 5.10 % per annum | Minimum
Debt Instrument [Line Items]
Debt instrument interest rate		0.01%
Unsecured loans, due 2021 to 2030, with interest rates ranging from 0.01 % to 5.10 % per annum | Maximum
Debt Instrument [Line Items]
Debt instrument interest rate		5.10%
Unsecured 0.23% bonds, due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		0.23%	0.23%
Unsecured 0.11% bonds, due 2022
Debt Instrument [Line Items]
Debt instrument interest rate		0.11%	0.11%
Unsecured 1.41% bonds, due 2022
Debt Instrument [Line Items]
Debt instrument interest rate		1.41%	1.41%
Unsecured 0.28% bonds, due 2023
Debt Instrument [Line Items]
Debt instrument interest rate		0.28%	0.28%
Unsecured 0.13% bonds, due 2024
Debt Instrument [Line Items]
Debt instrument interest rate		0.13%	0.13%
Unsecured 0.15% bonds, due 2024
Debt Instrument [Line Items]
Debt instrument interest rate		0.15%	0.15%
Unsecured 0.22% bonds, due 2025
Debt Instrument [Line Items]
Debt instrument interest rate		0.22%	0.22%
Unsecured 0.18% bonds, due 2026
Debt Instrument [Line Items]
Debt instrument interest rate		0.18%	0.18%
Unsecured 0.20% bonds, due 2026
Debt Instrument [Line Items]
Debt instrument interest rate		0.20%	0.20%
Unsecured 0.42% bonds, due 2026
Debt Instrument [Line Items]
Debt instrument interest rate		0.42%	0.42%
Unsecured 0.30% bonds, due 2029
Debt Instrument [Line Items]
Debt instrument interest rate		0.30%	0.30%
Unsecured zero coupon convertible bonds, due 2022
Debt Instrument [Line Items]
Conversion price per common share	¥ 4,969.2	¥ 4,982.5	¥ 4,996	¥ 5,008
Unsecured zero coupon convertible bonds, due 2022 | Minimum
Debt Instrument [Line Items]
Conversion price per common share				3,526.5
Unsecured zero coupon convertible bonds, due 2022 | Maximum
Debt Instrument [Line Items]
Conversion price per common share				¥ 5,008
Secured 0.00% loans, due 2022 to 2023
Debt Instrument [Line Items]
Debt instrument interest rate			0.00%
Secured 0.00% loans, due 2021 to 2026
Debt Instrument [Line Items]
Debt instrument interest rate		0.00%	0.00%
Finance lease liabilities and other, due 2020 to 2050 | Minimum
Debt Instrument [Line Items]
Debt instrument interest rate			0.01%
Finance lease liabilities and other, due 2020 to 2050 | Maximum
Debt Instrument [Line Items]
Debt instrument interest rate			12.59%
Finance lease liabilities and other, due 2021 to 2051 | Minimum
Debt Instrument [Line Items]
Debt instrument interest rate		0.01%
Finance lease liabilities and other, due 2021 to 2051 | Maximum
Debt Instrument [Line Items]
Debt instrument interest rate		5.45%

Short-Term Borrowings and Lon_8

Short-Term Borrowings and Long-Term Debt (Aggregate Amounts of Annual Maturities of Long-Term Debt) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Debt Disclosure [Abstract]
2022	¥ 131,699
2023	106,626
2024	95,016
2025	188,572
2026	26,867
Later fiscal years	356,213
Total	¥ 904,993	¥ 664,773

Housing Loans and Deposits fr_3

Housing Loans and Deposits from Customers in the Banking Business - Additional Information (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Housing Loans And Deposits From Customers [Abstract]
Housing loans in the banking business, Carrying amount	¥ 2,354,546	¥ 1,927,054
Allowance for credit losses of housing loans in the banking business	1,004	780
Balance of time deposits and thrift saving deposits issued in amounts of 10 million yen or more	¥ 391,442	¥ 320,351

Housing Loans and Deposits fr_4

Housing Loans and Deposits from Customers in the Banking Business (Summary of Amortized Cost of Housing Loans in the Banking Business by Both Credit Quality Indicator Based On The Credit Ratings of Debtors and Year of Origination) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2021		Mar. 31, 2020
2021		¥ 547,345
2020		349,470
2019		252,967
2018		158,811
2017		269,668
Prior		776,285
Total		2,354,546		¥ 1,927,054
Normal | Home Equity Loan
2021	[1]	547,133
2020	[1]	349,334
2019	[1]	252,609
2018	[1]	158,546
2017	[1]	269,450
Prior	[1]	772,072
Total		2,349,144	[1]	1,923,648
Other than normal | Home Equity Loan
2021		212
2020		136
2019		358
2018		265
2017		218
Prior		4,213
Total		¥ 5,402		¥ 3,406
[1]	Normal is defined as borrowers who do not have particular problems with their financial position.

Housing Loans and Deposits fr_5

Housing Loans and Deposits from Customers in the Banking Business (Aggregate Amounts of Annual Maturities of Time Deposits and Thrift Saving Deposits with Remaining Term of More Than One Year) (Detail) ¥ in Millions	Mar. 31, 2021JPY (¥)
Interest-bearing Deposit Liabilities [Abstract]
2023	¥ 36,586
2024	19,643
2025	3,135
2026	3,159
2027	400
Later fiscal years	28,805
Total	¥ 91,728

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value of Assets and Liabilities Measured on Recurring Basis) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2021	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		¥ 288,895	¥ 270,120
Derivative assets		28,737	42,383
Derivative liabilities		40,354	35,866
Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		45,821	16,253
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		288,895	270,120
Other investments	[1]	20,998	17,220
Derivative assets	[2]	28,737	42,383
Total assets		6,542,264	4,774,922
Future insurance policy benefits and policyholders' account in the life insurance business	[3]	536,189	532,191
Derivative liabilities	[2]	40,354	35,866
Total liabilities		576,543	568,057
Fair Value, Measurements, Recurring | Japanese national government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		2,443,266	1,761,929
Fair Value, Measurements, Recurring | Japanese local government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		74,063	69,172
Fair Value, Measurements, Recurring | Japanese corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		271,813	220,709
Fair Value, Measurements, Recurring | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[4]	325,856	279,777
Fair Value, Measurements, Recurring | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[5]	382,874	359,750
Fair Value, Measurements, Recurring | Securitized products
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[6]	198,593	205,223
Fair Value, Measurements, Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		2,461,348	1,532,386
Fair Value, Measurements, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		45,821	16,253
Marketable securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		288,895	270,120
Other investments	[1]	0
Derivative assets	[2]	0
Total assets		2,899,766	1,841,697
Derivative liabilities	[2]	0
Total liabilities		42,309	64,045
Marketable securities | Fair Value, Measurements, Recurring | Japanese national government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		394,295	10,011
Marketable securities | Fair Value, Measurements, Recurring | Japanese local government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		29,624	15,334
Marketable securities | Fair Value, Measurements, Recurring | Japanese corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		24,980	14,774
Marketable securities | Fair Value, Measurements, Recurring | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[4]	0	2,690
Marketable securities | Fair Value, Measurements, Recurring | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[5]	117,209	94,156
Marketable securities | Fair Value, Measurements, Recurring | Securitized products
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[6]	0
Marketable securities | Fair Value, Measurements, Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		2,044,763	1,434,612
Marketable securities | Fair Value, Measurements, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Securities investments and other | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0
Other investments	[1]	20,998	17,220
Derivative assets	[2]	0
Total assets		3,613,761	2,890,842
Derivative liabilities	[2]	0
Total liabilities		493,880	468,146
Securities investments and other | Fair Value, Measurements, Recurring | Japanese national government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		2,048,971	1,751,918
Securities investments and other | Fair Value, Measurements, Recurring | Japanese local government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		44,439	53,838
Securities investments and other | Fair Value, Measurements, Recurring | Japanese corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		246,833	205,935
Securities investments and other | Fair Value, Measurements, Recurring | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[4]	325,856	277,087
Securities investments and other | Fair Value, Measurements, Recurring | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[5]	265,665	265,594
Securities investments and other | Fair Value, Measurements, Recurring | Securitized products
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[6]	198,593	205,223
Securities investments and other | Fair Value, Measurements, Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		416,585	97,774
Securities investments and other | Fair Value, Measurements, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		45,821	16,253
Future insurance policy benefits | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Future insurance policy benefits and policyholders' account in the life insurance business	[3]	42,309	64,045
Policyholders' account | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Future insurance policy benefits and policyholders' account in the life insurance business	[3]	493,880	468,146
Other current assets and liabilities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0
Other investments	[1]	0
Derivative assets	[2]	14,412	40,784
Total assets		14,412	40,784
Future insurance policy benefits and policyholders' account in the life insurance business	[3]	0
Derivative liabilities	[2]	26,086	16,814
Total liabilities		26,086	16,814
Other current assets and liabilities | Fair Value, Measurements, Recurring | Japanese national government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Other current assets and liabilities | Fair Value, Measurements, Recurring | Japanese local government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Other current assets and liabilities | Fair Value, Measurements, Recurring | Japanese corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Other current assets and liabilities | Fair Value, Measurements, Recurring | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[4]	0
Other current assets and liabilities | Fair Value, Measurements, Recurring | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[5]	0
Other current assets and liabilities | Fair Value, Measurements, Recurring | Securitized products
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[6]	0
Other current assets and liabilities | Fair Value, Measurements, Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Other current assets and liabilities | Fair Value, Measurements, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Other noncurrent assets and liabilities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0
Other investments	[1]	0
Derivative assets	[2]	14,325	1,599
Total assets		14,325	1,599
Future insurance policy benefits and policyholders' account in the life insurance business	[3]	0
Derivative liabilities	[2]	14,268	19,052
Total liabilities		14,268	19,052
Other noncurrent assets and liabilities | Fair Value, Measurements, Recurring | Japanese national government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Other noncurrent assets and liabilities | Fair Value, Measurements, Recurring | Japanese local government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Other noncurrent assets and liabilities | Fair Value, Measurements, Recurring | Japanese corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Other noncurrent assets and liabilities | Fair Value, Measurements, Recurring | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[4]	0
Other noncurrent assets and liabilities | Fair Value, Measurements, Recurring | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[5]	0
Other noncurrent assets and liabilities | Fair Value, Measurements, Recurring | Securitized products
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[6]	0
Other noncurrent assets and liabilities | Fair Value, Measurements, Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Other noncurrent assets and liabilities | Fair Value, Measurements, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		30,164	24,330
Other investments	[1]	7,544	7,162
Derivative assets	[2]	261	1,310
Total assets		1,795,103	983,546
Future insurance policy benefits and policyholders' account in the life insurance business	[3]	0
Derivative liabilities	[2]	1,116	2,077
Total liabilities		1,116	2,077
Level 1 | Fair Value, Measurements, Recurring | Japanese national government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Level 1 | Fair Value, Measurements, Recurring | Japanese local government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Level 1 | Fair Value, Measurements, Recurring | Japanese corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Level 1 | Fair Value, Measurements, Recurring | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[4]	0
Level 1 | Fair Value, Measurements, Recurring | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[5]	0
Level 1 | Fair Value, Measurements, Recurring | Securitized products
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[6]	0
Level 1 | Fair Value, Measurements, Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		1,757,134	950,744
Level 1 | Fair Value, Measurements, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		258,731	245,790
Other investments	[1]	4,128	816
Derivative assets	[2]	28,476	41,073
Total assets		4,533,977	3,582,393
Future insurance policy benefits and policyholders' account in the life insurance business	[3]	0
Derivative liabilities	[2]	39,238	33,789
Total liabilities		39,238	33,789
Level 2 | Fair Value, Measurements, Recurring | Japanese national government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		2,443,266	1,761,929
Level 2 | Fair Value, Measurements, Recurring | Japanese local government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		74,063	69,172
Level 2 | Fair Value, Measurements, Recurring | Japanese corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		264,644	220,679
Level 2 | Fair Value, Measurements, Recurring | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[4]	325,856	279,777
Level 2 | Fair Value, Measurements, Recurring | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[5]	365,029	343,980
Level 2 | Fair Value, Measurements, Recurring | Securitized products
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[6]	44,104	33,383
Level 2 | Fair Value, Measurements, Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		704,214	581,642
Level 2 | Fair Value, Measurements, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		21,466	4,152
Level 3 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0
Other investments	[1]	9,326	9,242
Derivative assets	[2]	0
Total assets		213,184	208,983
Future insurance policy benefits and policyholders' account in the life insurance business	[3]	536,189	532,191
Derivative liabilities	[2]	0
Total liabilities		536,189	532,191
Level 3 | Fair Value, Measurements, Recurring | Japanese national government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Level 3 | Fair Value, Measurements, Recurring | Japanese local government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Level 3 | Fair Value, Measurements, Recurring | Japanese corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		7,169	30
Level 3 | Fair Value, Measurements, Recurring | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[4]	0
Level 3 | Fair Value, Measurements, Recurring | Foreign corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[5]	17,845	15,770
Level 3 | Fair Value, Measurements, Recurring | Securitized products
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	[6]	154,489	171,840
Level 3 | Fair Value, Measurements, Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Level 3 | Fair Value, Measurements, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		¥ 24,355	¥ 12,101
[1]	Other investments include certain hybrid financial instruments and certain private equity investments.
[2]	Derivative assets and liabilities are recognized and disclosed on a gross basis.
[3]	Future insurance policy benefits and policyholders’ account in the life insurance business are those for which the fair value option has been elected.
[4]	7,771 million yen and 15,654 million yen are included in foreign securities for which the fair value option has been elected and classified in level 2 for the fiscal years ended March 31, 2020 and 2021. In the consolidated balance sheets, 2,386 million yen are included as marketable securities for the fiscal years ended March 31, 2020 and 5,385 million yen and 15,654 million yen are included as securities investment and other for the fiscal years ended March 31, 2020 and 2021, respectively.
[5]	188,426 million yen and 228,761 million yen are included in foreign securities for which the fair value option has been elected and classified in level 2 for the fiscal years ended March 31, 2020 and 2021, respectively. In the consolidated balance sheets, 34,502 million yen and 52,637 million yen are included as marketable securities and 153,924 million yen and 176,124 million yen are included as securities investment and other for the fiscal years ended March 31, 2020 and 2021, respectively.
[6]	193,430 million yen and 192,451 million yen are included in foreign securities for which the fair value option has been elected and classified in level 2 and level 3 for the fiscal years ended March 31, 2020 and 2021, respectively, and are included in the consolidated balance sheets as securities investments and other.

Fair Value Measurements (Fair_2

Fair Value Measurements (Fair Value of Assets and Liabilities Measured on Recurring Basis) (Parenthetical) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net gains from financial instruments for which fair value option has been elected	¥ 4,645	¥ (12,408)
Level 2 | Fair Value, Measurements, Recurring | Foreign government bonds: foreign securities for which fair value option has been elected
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	15,654	7,771
Level 2 | Fair Value, Measurements, Recurring | Foreign corporate bonds: foreign securities for which fair value option has been elected
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	228,761	188,426
Marketable securities | Level 2 | Fair Value, Measurements, Recurring | Foreign government bonds: foreign securities for which fair value option has been elected
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		2,386
Marketable securities | Level 2 | Fair Value, Measurements, Recurring | Foreign corporate bonds: foreign securities for which fair value option has been elected
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	52,637	34,502
Securities investments and other | Level 2 | Fair Value, Measurements, Recurring | Foreign government bonds: foreign securities for which fair value option has been elected
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	15,654	5,385
Securities investments and other | Level 2 | Fair Value, Measurements, Recurring | Foreign corporate bonds: foreign securities for which fair value option has been elected
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	176,124	153,924
Securities investments and other | Level 3 | Fair Value, Measurements, Recurring | Other: foreign securities for which fair value option has been elected
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	¥ 192,451	¥ 193,430

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) ¥ in Millions	12 Months Ended
	Mar. 31, 2021Years	Mar. 31, 2020JPY (¥)	Mar. 31, 2019JPY (¥)	Dec. 31, 2019
Minimum | Measurement Input, Mortality Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Minimum guaranteed benefits variable annuity	0.004%
Minimum | Measurement Input, Lapse Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Minimum guaranteed benefits variable annuity	1.00%
Minimum | Measurement Input, Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Minimum guaranteed benefits variable annuity	(0.046%)
Maximum | Measurement Input, Mortality Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum guaranteed benefits variable annuity	44.865%
Maximum | Measurement Input, Lapse Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum guaranteed benefits variable annuity	7.50%
Maximum | Measurement Input, Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum guaranteed benefits variable annuity	3.379%
Weighted Average | Measurement Input, Mortality Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average guaranteed benefits variable annuity	0.896%
Weighted Average | Measurement Input, Lapse Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average guaranteed benefits variable annuity	4.312%
Weighted Average | Measurement Input, Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted average guaranteed benefits variable annuity	0.967%
Fair value measurements | Years	50
Electronics Products & Solutions | Smartphone Business Asset Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of long-lived assets		¥ 12,714	¥ 19,172
Electronics Products & Solutions | Smartphone Business Asset Group | Level 3 | Measurement Input, Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements		10.6	8.5
Electronics Products & Solutions | Smartphone Business Asset Group | Minimum | Level 3 | Measurement Input, Long-term Revenue Growth Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements		(10)	(26)
Electronics Products & Solutions | Smartphone Business Asset Group | Maximum | Level 3 | Measurement Input, Long-term Revenue Growth Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements		70	24
All Other | Storage Media Business Asset Group
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of long-lived assets			¥ 12,858
All Other | Storage Media Business Asset Group | Level 3 | Measurement Input, Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements				8.9
All Other | Storage Media Business Asset Group | Minimum | Level 3 | Measurement Input, Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements				(34)
All Other | Storage Media Business Asset Group | Maximum | Level 3 | Measurement Input, Discount Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value measurements				21

Fair Value Measurements (Change

Fair Value Measurements (Changes in Fair Value of Level Three Assets and Liabilities) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Japanese corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases and Issuances		¥ 7,600	¥ 30
Foreign corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases and Issuances		5,441	13,597
Securitized products
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases and Issuances		0	40,175
Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		12,101
Purchases and Issuances		11,215	12,101
Sales		0
Settlements		(4,681)
Other		28
Ending balance			12,101
Other Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		9,242	6,918
Total realized and unrealized gains (losses), included in earnings (loss)	[1]	772
Purchases and Issuances		28	4,711
Sales		(2)	(9)
Settlements		(825)	(1,878)
Other		111
Ending balance		9,326	9,242
Future insurance policy benefits and Policyholders' account
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		532,191
Acquisition of AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd.	[2]		547,190
Total realized and unrealized gains (losses), included in earnings (loss)	[1]	(16,475)	12,500
Total realized and unrealized gains (losses), included in other comprehensive income (loss)	[3]	(3,120)	3,032
Purchases and Issuances		1,996	5,295
Sales		0	0
Settlements		(17,593)	(4,762)
Transfers into level 3	[4]	0	0
Transfers out of level 3	[5]		0
Ending balance		536,189	532,191
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in other comprehensive income (loss)	[3]	(3,120)
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in earnings (loss)	[1]	(29,205)	10,273
Available-for-sale securities | Japanese corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		30	0
Total realized and unrealized gains (losses), included in earnings (loss)	[1]	0	0
Total realized and unrealized gains (losses), included in other comprehensive income (loss)	[3]	(461)	0
Sales		0	0
Settlements		0	0
Other		0
Transfers into level 3	[4]	0	0
Transfers out of level 3	[5]		0
Ending balance		7,169	30
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in other comprehensive income (loss)	[3]	(461)
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in earnings (loss)	[1]	0	0
Available-for-sale securities | Foreign corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		15,770	22,704
Total realized and unrealized gains (losses), included in earnings (loss)	[1]	1,465	311
Total realized and unrealized gains (losses), included in other comprehensive income (loss)	[3]	73	(73)
Sales		0	0
Settlements		(7,835)	(20,867)
Other		(1,613)
Transfers into level 3	[4]	4,544	3,374
Transfers out of level 3	[5]		(3,276)
Ending balance		17,845	15,770
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in other comprehensive income (loss)	[3]	14
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in earnings (loss)	[1]	600	(94)
Available-for-sale securities | Securitized products
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		171,840	165,083
Total realized and unrealized gains (losses), included in earnings (loss)	[1]	14,000	(18,151)
Total realized and unrealized gains (losses), included in other comprehensive income (loss)	[3]	0	1
Sales		0	0
Settlements		(34,488)	(12,967)
Other		1,014
Transfers into level 3	[4]	2,123	0
Transfers out of level 3	[5]		(2,301)
Ending balance		154,489	171,840
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in other comprehensive income (loss)	[3]	0
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in earnings (loss)	[1]	17,419	(16,507)
Available-for-sale securities | Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total realized and unrealized gains (losses), included in earnings (loss)	[1]	5,703
Total realized and unrealized gains (losses), included in other comprehensive income (loss)	[3]	(11)
Transfers into level 3	[4]	0
Ending balance		24,355
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in other comprehensive income (loss)	[3]	(17)
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in earnings (loss)	[1]	0
Available-for-sale securities | Other Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		9,242
Total realized and unrealized gains (losses), included in earnings (loss)	[1]		(500)
Total realized and unrealized gains (losses), included in other comprehensive income (loss)	[3]	0	0
Transfers into level 3	[4]	0	0
Transfers out of level 3	[5]		0
Ending balance			9,242
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in other comprehensive income (loss)	[3]	0
Changes in unrealized gains (losses) relating to instruments still held at reporting date included in earnings (loss)	[1]	(77)	(376)
Available-for-sale securities | Future insurance policy benefits and Policyholders' account
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		¥ 532,191
Ending balance			¥ 532,191
[1]	Earning effects are included in financial services revenue and financial services expense in the consolidated statements of income.
[2]	Refer to Note 24.
[3]	Unrealized gains (losses) are included in unrealized gains (losses) on securities, net for available-for-sale securities and included in debt valuation adjustments for future insurance policy benefits and policyholders’ account in the consolidated statements of comprehensive income.
[4]	Certain corporate bonds and certain securitized products were transferred into level 3 because differences between the fair value determined by indicative quotes from dealers and the fair value determined by internally developed prices became significant and the observability of the inputs used decreased.
[5]	Certain corporate bonds and certain securitized products were transferred out of level 3 because observable market data became available.

Fair Value Measurements (Assets

Fair Value Measurements (Assets and Liabilities Remeasured At Fair Value on a Nonrecurring Basis) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Nonrecurring changes in fair value, Amounts included in earnings	¥ (25,685)	¥ (22,656)
Fair Value, Measurements, Nonrecurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Remeasurement of retained investment in SRE		15,911
Long-lived assets, Estimated fair value	0	0
Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-lived assets, Estimated fair value	0	0
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-lived assets, Estimated fair value	32,033	8,155
Remeasurement Of Retained Investment in SRE [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Nonrecurring changes in fair value, Amounts included in earnings		13,347
Long-lived assets impairments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Nonrecurring changes in fair value, Amounts included in earnings	¥ (25,685)	¥ (36,003)

Fair Value Measurements (Estima

Fair Value Measurements (Estimated Fair Values by Fair Value Hierarchy Level of Certain Financial Instruments not Reported at Fair Value) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Apr. 01, 2020	Mar. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Housing loans in the banking business, Carrying amount	¥ 2,354,546		¥ 1,927,054
Total assets, Carrying amount	26,354,840	¥ 23,032,784	23,039,343
Long-term debt including the current portion, Carrying amount	904,993		664,773
Total liabilities	20,725,185	¥ 18,240,537	18,242,041
Estimated fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Housing loans in the banking business, Estimated fair value	2,559,073		2,161,432
Total assets, Estimated fair value	2,559,073		2,161,432
Long-term debt including the current portion, Estimated fair value	951,874		699,358
Investment contracts included in policyholders' account in the life insurance business, Estimated fair value	1,159,195		969,464
Total liabilities, Estimated fair value	2,111,069		1,668,822
Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Housing loans in the banking business, Carrying amount	2,354,546		1,927,054
Total assets, Carrying amount	2,354,546		1,927,054
Long-term debt including the current portion, Carrying amount	904,993		664,773
Investment contracts included in policyholders' account in the life insurance business, Carrying amount	1,103,785		885,690
Total liabilities	2,008,778		1,550,463
Level 2 | Estimated fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Housing loans in the banking business, Estimated fair value	0		2,161,432
Total assets, Estimated fair value	0		2,161,432
Long-term debt including the current portion, Estimated fair value	911,885		699,358
Investment contracts included in policyholders' account in the life insurance business, Estimated fair value	1,159,195		969,464
Total liabilities, Estimated fair value	2,071,080		¥ 1,668,822
Level 3 | Estimated fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Housing loans in the banking business, Carrying amount	2,559,073
Total assets, Carrying amount	2,559,073
Long-term debt including the current portion, Carrying amount	39,989
Total liabilities	¥ 39,989

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities (Estimated Fair Values of Outstanding Derivative Instruments) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative assets	¥ 28,737	¥ 42,383
Derivative liabilities	40,354	35,866
Designated as hedging instrument
Derivatives, Fair Value [Line Items]
Derivative assets	10,929	1,835
Derivative liabilities	12,350	8,360
Designated as hedging instrument | Interest rate contracts | Current liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	286	183
Designated as hedging instrument | Interest rate contracts | Liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	6,064	8,177
Designated as hedging instrument | Interest rate contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets		9
Designated as hedging instrument | Interest rate contracts | Other assets: Other
Derivatives, Fair Value [Line Items]
Derivative assets	10,921	27
Designated as hedging instrument | Foreign exchange contracts | Current liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	6,000
Designated as hedging instrument | Foreign exchange contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	8	1,799
Not designated as hedging instrument
Derivatives, Fair Value [Line Items]
Derivative assets	17,808	40,548
Derivative liabilities	28,004	27,506
Not designated as hedging instrument | Interest rate contracts | Current liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	408	200
Not designated as hedging instrument | Interest rate contracts | Liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	8,204	9,120
Not designated as hedging instrument | Interest rate contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	50	44
Not designated as hedging instrument | Interest rate contracts | Other assets: Other
Derivatives, Fair Value [Line Items]
Derivative assets	1,817	1,523
Not designated as hedging instrument | Foreign exchange contracts | Current liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	14,233	14,580
Not designated as hedging instrument | Foreign exchange contracts | Liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	1,755
Not designated as hedging instrument | Foreign exchange contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	14,097	19,655
Not designated as hedging instrument | Foreign exchange contracts | Other assets: Other
Derivatives, Fair Value [Line Items]
Derivative assets	1,587	49
Not designated as hedging instrument | Equity Contracts | Current liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	5,157	1,476
Not designated as hedging instrument | Equity Contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	240	18,886
Not designated as hedging instrument | Bond contracts | Current liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	2	290
Not designated as hedging instrument | Bond contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	17	306
Not designated as hedging instrument | Commodity contracts | Current liabilities: Other
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	85
Not designated as hedging instrument | Commodity contracts | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	¥ 0	¥ 85

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Derivative [Line Items]
Gain (Loss) from components excluded from assessment of fair value hedge effectiveness, net	¥ 0	¥ 0	¥ 0

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities (Effects of Derivative Instruments on Consolidated Statements of Income) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	¥ (1,189)	¥ (3,925)	¥ (1,835)
Derivative assets	28,737	42,383
Not designated as hedging instrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	(109,016)	26,441	(26,476)
Derivative assets	17,808	40,548
Not designated as hedging instrument | Interest rate contracts | Financial services revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	(9,603)	1,190	(3,192)
Not designated as hedging instrument | Foreign exchange contracts | Financial services revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	(10,730)	2,473	(8,198)
Not designated as hedging instrument | Foreign exchange contracts | Foreign exchange loss, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	(8,454)	10,184	(7,437)
Not designated as hedging instrument | Equity Contracts | Financial services revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	(85,118)	15,438	(7,649)
Not designated as hedging instrument | Bond contracts | Financial services revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	99	(2,954)
Not designated as hedging instrument | Commodity contracts | Financial services revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	4,790	110
Amortized Cost
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	105,039	106,335
Amortized Cost | Interest rate contracts | Marketable securities
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	30,167	15,255
Amortized Cost | Interest rate contracts | Securities investments and other
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	74,872	91,080
Fair Value Hedging | Interest rate contracts | Financial services revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative	(1,189)	(3,925)	(1,835)
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in OCI on derivative	(5,360)	(981)	(1,093)
Amount of gain or (loss) reclassified from accumulated OCI into income (effective portion)	(5,360)	(981)	(1,093)
Unrealized gain (loss) on cash flow hedging instruments	8,206	2,799	2,315
Cash Flow Hedging | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Components included in the assessment of hedge effectiveness	10,153	0	0
Cash Flow Hedging | Interest rate contracts | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in OCI on derivative	285	0	0
Amount of gain or (loss) reclassified from accumulated OCI into income (effective portion)	285	0	0
Cash Flow Hedging | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in OCI on derivative	(2,210)	1,712	2,315
Amount of gain or (loss) reclassified from accumulated OCI into income (effective portion)	(2,210)	1,712	2,315
Gain (loss) from unrealized gains (losses)	263	1,087	0
Cash Flow Hedging | Foreign exchange contracts | Cost of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in OCI on derivative	0		(1,093)
Amount of gain or (loss) reclassified from accumulated OCI into income (effective portion)	0		(1,093)
Cash Flow Hedging | Foreign exchange contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) from unrealized gains (losses)	(263)	(1,087)
Components included in the assessment of hedge effectiveness	(5,382)	¥ 106	¥ 0
Cumulative effect to carrying amount of hedged items by fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	0
Cumulative effect to carrying amount of hedged items by fair value hedges | Interest rate contracts | Marketable securities
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	0
Cumulative effect to carrying amount of hedged items by fair value hedges | Interest rate contracts | Securities investments and other
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	¥ 0

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities (Summary of Derivatives Additional Information Including Notional Amounts) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2021	Mar. 31, 2020
Foreign exchange forward contracts
Derivative [Line Items]
Notional amount	[1]	¥ 1,176,589	¥ 989,966
Fair value	[1]	(5,420)	3,201
Currency option contracts purchased
Derivative [Line Items]
Notional amount		36,234	473
Fair value		15	7
Currency option contracts written
Derivative [Line Items]
Notional amount		36,164	460
Fair value		(1,790)	(5)
Currency swap agreements
Derivative [Line Items]
Notional amount		612,813	893,874
Fair value		490	(1,006)
Other currency contracts
Derivative [Line Items]
Notional amount	[1]	68,663	62,080
Fair value	[1]	2,164	2,971
Interest rate swap agreements
Derivative [Line Items]
Notional amount		979,554	994,133
Fair value		(1,969)	(16,019)
Interest rate swaption agreements
Derivative [Line Items]
Notional amount		38,700	18,700
Fair value		(205)	(58)
Equity future contracts
Derivative [Line Items]
Notional amount		129,526	63,354
Fair value		(746)	(871)
Equity swap agreements
Derivative [Line Items]
Notional amount		117,055	103,409
Fair value		(4,171)	18,281
Bond future contracts
Derivative [Line Items]
Notional amount		169,441	56,546
Fair value		15	16
Commodity future contracts
Derivative [Line Items]
Notional amount		2,957	1,465
Fair value		¥ 0	¥ 0
[1]	Revision has been made to correct the notional amount of foreign exchange forward contracts and the presentation of fair values of foreign exchange forward contracts and other currency contracts as of March 31, 2020.

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities (Summary of Effects of Offsetting Derivative Assets, Derivative Liabilities, Financial Assets and Financial Liabilities) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Offsetting Asset and Liabilities [Line Items]
Gross amounts presented in consolidated balance sheet, Total asset	¥ 28,737	¥ 42,383
Gross amounts presented in consolidated balance sheet, Total asset	354,893	42,383
Financial instruments, Total asset	336,822	12,614
Cash collateral, Total asset	2,008	20,545
Net amounts, Total asset	16,063	9,224
Gross amounts presented in the consolidated balance sheet, Derivative liability	40,354	35,866
Cash collateral, Derivative liability	0
Gross amounts presented in the consolidated balance sheet, Repurchase, securities lending and similar arrangements	917,792	567,194
Financial instruments, Repurchase, securities lending and similar arrangements	911,881	564,874
Net amounts, Repurchase, securities lending and similar arrangements	5,911	2,320
Gross amounts presented in the consolidated balance sheet, Total liabilities	958,146	603,060
Financial instruments, Total liabilities	922,933	571,960
Cash collateral, Total liabilities	16,225	23,873
Net amounts, Total liabilities	18,988	7,227
Gross amounts presented in the consolidated balance sheet, Securities borrowing and Securities Lending Transactions	326,156
Financial instruments, Securities borrowing and Securities Lending Transactions	326,156
Subject to master netting arrangement
Offsetting Asset and Liabilities [Line Items]
Gross amounts presented in consolidated balance sheet, Total asset	15,159	38,281
Financial instruments, Total asset	10,666	12,614
Cash collateral, Total asset	2,008	20,545
Net amounts, Total asset	2,485	5,122
Gross amounts presented in the consolidated balance sheet, Derivative liability	38,966	31,896
Financial instruments, Derivative liability	11,052	7,086
Cash collateral, Derivative liability	16,225	23,873
Net amounts, Derivative liability	11,689	937
Not subject to master netting arrangement
Offsetting Asset and Liabilities [Line Items]
Gross amounts presented in consolidated balance sheet, Total asset	13,578	4,102
Net amounts, Total asset	13,578	4,102
Gross amounts presented in the consolidated balance sheet, Derivative liability	1,388	3,970
Net amounts, Derivative liability	¥ 1,388	¥ 3,970

Pension and Severance Plans - A

Pension and Severance Plans - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Percentage of the indemnities under existing regulations to employees covered by defined benefits				65.00%
Increase Decrease in accumulated other comprehensive income		¥ 81,230
Loss on the pension plan amendment		6,358
Increase Decrease in accrued pension and severance costs		74,872
Japan
Defined Benefit Plan Disclosure [Line Items]
Expected contribution in defined benefit pension plans	¥ 2,000
Loss on the pension plan amendment		6,358
Japan | Private equity
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans	20.00%
Japan | Fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans	51.00%
Japan | Other investment funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans	29.00%
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Expected contribution in defined benefit pension plans	¥ 12,000
Loss on the pension plan amendment	¥ 2,128	¥ 68	¥ 1,804
Foreign plans | Private equity
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans	29.00%
Foreign plans | Fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans	6.00%
Foreign plans | Other investment funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in equity securities for the pension plans	65.00%

Pension and Severance Plans (Co

Pension and Severance Plans (Components of Net Periodic Benefit Costs) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Losses on curtailments and settlements		¥ 6,358
Japan
Defined Benefit Plan Disclosure [Line Items]
Service cost	¥ 12,763	17,948	¥ 23,128
Interest cost	3,684	4,162	7,020
Expected return on plan assets	(10,802)	(17,040)	(16,695)
Recognized actuarial loss	8,852	12,969	15,365
Amortization of prior service costs	(343)	(4,294)	(7,864)
Losses on curtailments and settlements		6,358
Net periodic benefit costs	14,154	20,103	20,954
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,767	3,616	2,780
Interest cost	6,509	9,212	10,083
Expected return on plan assets	(6,395)	(10,916)	(11,797)
Recognized actuarial loss	3,614	2,606	2,656
Amortization of prior service costs	1,058	2	(269)
Losses on curtailments and settlements	2,128	68	1,804
Net periodic benefit costs	¥ 9,681	¥ 4,588	¥ 5,257

Pension and Severance Plans (Ch

Pension and Severance Plans (Changes in Benefit Obligation and Plan Assets as well as Funded Status and Composition of Amounts Recognized in Consolidated Balance Sheets) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Japan
Change in benefit obligation:
Benefit obligation at beginning of the fiscal year	¥ 658,863	¥ 1,034,954
Service cost	12,763	17,948	¥ 23,128
Interest cost	3,684	4,162	7,020
Plan participants' contributions	0
Actuarial (gain) loss	271	(3,330)
Curtailments and settlements	0	(359,205)
Other	43	2
Benefits paid	(35,563)	(35,668)
Benefit obligation at end of the fiscal year	640,061	658,863	1,034,954
Change in plan assets:
Fair value of plan assets at beginning of the fiscal year	437,206	742,204
Actual return on plan assets	59,536	2,942
Foreign currency exchange rate changes	0
Employer contribution	2,333	7,453
Plan participants' contributions	0
Curtailments and settlements	0	(284,333)
Benefits paid	(22,664)	(31,060)
Fair value of plan assets at end of the fiscal year	476,411	437,206	742,204
Funded status at end of the fiscal year	(163,650)	(221,657)
Foreign plans
Change in benefit obligation:
Benefit obligation at beginning of the fiscal year	359,811	351,918
Service cost	2,767	3,616	2,780
Interest cost	6,509	9,212	10,083
Plan participants' contributions	269	487
Plan amendments	157	10,210
Actuarial (gain) loss	32,432	19,776
Foreign currency exchange rate changes	29,486	(16,919)
Curtailments and settlements	(14,587)	(4,434)
Effect of changes in consolidated subsidiaries	0
Benefits paid	(18,555)	(14,055)
Benefit obligation at end of the fiscal year	398,289	359,811	351,918
Change in plan assets:
Fair value of plan assets at beginning of the fiscal year	281,110	274,749
Actual return on plan assets	(596)	26,738
Foreign currency exchange rate changes	25,433	(14,904)
Employer contribution	38,169	9,916
Plan participants' contributions	269	487
Curtailments and settlements	(11,927)	(3,146)
Benefits paid	(16,967)	(12,730)
Fair value of plan assets at end of the fiscal year	315,491	281,110	¥ 274,749
Funded status at end of the fiscal year	¥ (82,798)	¥ (78,701)

Pension and Severance Plans (Am

Pension and Severance Plans (Amounts Recognized in Consolidated Balance Sheets) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Japan
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	¥ 5,746	¥ 3,391
Noncurrent liabilities	(169,396)	(225,048)
Ending balance	(163,650)	(221,657)
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	13,660	24,777
Current liabilities	(12,364)	(4,355)
Noncurrent liabilities	(84,094)	(99,123)
Ending balance	¥ (82,798)	¥ (78,701)

Pension and Severance Plans (_2

Pension and Severance Plans (Amounts Recognized in Accumulated Other Comprehensive Income, Excluding Tax Effects) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Japan
Defined Benefit Plan Disclosure [Line Items]
Prior service cost (credit)	¥ (26)	¥ (369)
Net actuarial loss	163,401	223,354
Ending balance	163,375	222,985
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Prior service cost (credit)	9,350	10,058
Net actuarial loss	102,821	66,326
Ending balance	¥ 112,171	¥ 76,384

Pension and Severance Plans (Ac

Pension and Severance Plans (Accumulated Benefit Obligations for All Defined Benefit Pension Plans) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Japan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligations	¥ 635,285	¥ 654,209
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligations	¥ 392,375	¥ 354,100

Pension and Severance Plans (_3

Pension and Severance Plans (Accumulated Benefit Obligations and Fair Value of Plan Assets for Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Japan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligations	¥ 621,296	¥ 640,890
Fair value of plan assets	456,662	420,497
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligations	200,020	226,080
Fair value of plan assets	¥ 109,468	¥ 130,955

Pension and severance plans (Pr

Pension and severance plans (Projected benefit obligations and fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
JAPAN
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations	¥ 626,057	¥ 645,544
Fair value of plan assets	456,662	420,497
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations	205,915	234,652
Fair value of plan assets	¥ 109,468	¥ 131,546

Pension and Severance Plans (We

Pension and Severance Plans (Weighted-Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Costs) (Detail)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Japan
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	0.60%	0.60%
Interest crediting rate	3.40%	3.40%
Rate of compensation increase
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	0.60%	0.60%	0.80%
Expected return on plan assets	2.50%	2.60%	2.60%
Interest crediting rate	3.40%	3.50%	3.50%
Rate of compensation increase
Foreign plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	1.40%	2.00%
Interest crediting rate	4.80%	4.80%
Rate of compensation increase	2.50%	2.20%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.00%	2.80%	2.90%
Expected return on plan assets	2.30%	4.20%	4.40%
Interest crediting rate	4.80%	4.80%	4.80%
Rate of compensation increase	2.20%	2.30%	2.60%

Pension and Severance Plans (Fa

Pension and Severance Plans (Fair Values of Assets Held by Japanese and Foreign Plans) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2021		Mar. 31, 2020		Mar. 31, 2019
Japan
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		¥ 476,411		¥ 437,206		¥ 742,204
Japan | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		53,298		24,851
Japan | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[1]	63,927		50,646
Japan | Government bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[2]	116,687		107,478
Japan | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[3]	30,348		71,192
Japan | Asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[4]	1,029		1,090
Japan | Commingled funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[5]	89,281		58,740
Japan | Commodity Funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[6]	22,283		21,823
Japan | Private equity
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[7]	29,153		30,191
Japan | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[8]	47,384		48,410
Japan | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[9]	23,021		22,785
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		315,491		281,110		274,749
Foreign plans | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		5,914		4,632
Foreign plans | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[10]	11,349		18,380
Foreign plans | Government bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[11]	18,843		93,826
Foreign plans | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[12]	59,071		31,769
Foreign plans | Asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		120		1,320
Foreign plans | Commingled funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[13]	59,867		78,280
Foreign plans | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[9]	3,760		33,569
Foreign plans | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[14]	156,567		19,334
Level 1 | Japan
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		114,412		73,266
Level 1 | Japan | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		53,298		24,851
Level 1 | Japan | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[1]	59,946		47,308
Level 1 | Japan | Government bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[2]	1,149		1,087
Level 1 | Japan | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[3]	19		20
Level 1 | Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		16,545		22,394
Level 1 | Foreign plans | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		5,914		4,632
Level 1 | Foreign plans | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[10]	10,631		17,762
Level 2 | Japan
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		259,953		259,968
Level 2 | Japan | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[1]	3,981		3,338
Level 2 | Japan | Government bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[2]	115,538		106,391
Level 2 | Japan | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[3]	30,329		71,172
Level 2 | Japan | Asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[4]	1,029		1,090
Level 2 | Japan | Commingled funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[5]	89,281		58,740
Level 2 | Japan | Commodity Funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[6]	22,283		21,823
Level 2 | Japan | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[9]	(2,488)		(2,586)
Level 2 | Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		146,168		224,241
Level 2 | Foreign plans | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[10]	718		618
Level 2 | Foreign plans | Government bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[11]	18,843		93,826
Level 2 | Foreign plans | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[12]	59,071		31,769
Level 2 | Foreign plans | Asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		120		1,320
Level 2 | Foreign plans | Commingled funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[13]	59,867		78,280
Level 2 | Foreign plans | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[9]	69		11,272
Level 2 | Foreign plans | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held	[14]	7,480		7,156
Level 3 | Japan
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		102,046		103,972		120,954
Level 3 | Japan | Private equity
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		29,153	[7]	30,191	[7]	27,956
Level 3 | Japan | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		47,384	[8]	48,410	[8]	71,606
Level 3 | Japan | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		25,509	[9]	25,371	[9]	21,392
Level 3 | Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		152,778		34,475		34,583
Level 3 | Foreign plans | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		3,691	[9]	22,297	[9]	22,089
Level 3 | Foreign plans | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair values of the assets held		¥ 149,087	[14]	¥ 12,178	[14]	¥ 12,494
[1]	Includes approximately 37 percent and 42 percent of Japanese equity securities, and 63 percent and 58 percent of foreign equity securities for the fiscal years ended March 31, 2020 and 2021, respectively.
[2]	Includes approximately 36 percent of debt securities issued by Japanese national and local governments, and 64 percent of debt securities issued by foreign national and local governments for the fiscal years ended March 31, 2020 and 2021.
[3]	Includes debt securities issued by Japanese and foreign corporation and government related agencies.
[4]	Includes primarily mortgage-backed securities.
[5]	Commingled funds represent pooled institutional investments, including primarily investment trusts. They include approximately 50 percent and 54 percent of investments in equity, 45 percent and 43 percent of investments in fixed income, and 5 percent and 3 percent of investments in other for the fiscal years ended March 31, 2020 and 2021, respectively.
[6]	Represents commodity futures funds.
[7]	Includes multiple private equity funds of funds that primarily invest in venture, buyout, and distressed markets in the United States and Europe.
[8]	Includes primarily funds that invest in a portfolio of a broad range of hedge funds to diversify the risks and reduce the volatilities associated with a single hedge fund.
[9]	Includes primarily private real estate investment trusts.
[10]	Includes primarily foreign equity securities.
[11]	Includes primarily foreign government debt securities.
[12]	Includes primarily foreign corporate debt securities.
[13]	Commingled funds represent pooled institutional investments including mutual funds, common trust funds, and collective investment funds. They are primarily comprised of foreign equities and fixed income investments.
[14]	Represents annuity contracts with or without profit sharing.

Pension and Severance Plans (_4

Pension and Severance Plans (Fair Values of Assets Held by Japanese and Foreign Plans) (Parenthetical) (Detail)	Mar. 31, 2021	Mar. 31, 2020
Commingled funds | Equity securities | Japan
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments	54.00%	50.00%
Commingled funds | Fixed Income Securities | Japan
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments	43.00%	45.00%
Commingled funds | Other investment funds | Japan
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments	3.00%	5.00%
Japanese equity securities | Japan
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments	42.00%	37.00%
Foreign equity securities | Japan
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments	58.00%	63.00%
Japanese National and Local Government Debt Securities | Japan
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments		36.00%
Foreign National and Local Government Debt Securities | Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments		64.00%

Pension and Severance Plans (Su

Pension and Severance Plans (Summary of Changes in Fair Values of Japanese and Foreign Plans' Level Three Assets) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2021		Mar. 31, 2020
Japan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year		¥ 437,206		¥ 742,204
Fair value of plan assets at end of the fiscal year		476,411		437,206
Japan | Private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year	[1]	30,191
Fair value of plan assets at end of the fiscal year	[1]	29,153		30,191
Japan | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year	[2]	48,410
Fair value of plan assets at end of the fiscal year	[2]	47,384		48,410
Japan | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year	[3]	22,785
Fair value of plan assets at end of the fiscal year	[3]	23,021		22,785
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year		281,110		274,749
Fair value of plan assets at end of the fiscal year		315,491		281,110
Foreign plans | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year	[3]	33,569
Fair value of plan assets at end of the fiscal year	[3]	3,760		33,569
Foreign plans | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year	[4]	19,334
Fair value of plan assets at end of the fiscal year	[4]	156,567		19,334
Level 3 | Japan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year		103,972		120,954
Return on assets held at end of year		13,550		2,419
Purchases, sales, and settlements, net		(5,087)		(19,401)
Transfers, net		(10,389)
Fair value of plan assets at end of the fiscal year		102,046		103,972
Level 3 | Japan | Private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year		30,191	[1]	27,956
Return on assets held at end of year		7,793		2,649
Purchases, sales, and settlements, net		(1,083)		(414)
Transfers, net		(7,748)
Fair value of plan assets at end of the fiscal year	[1]	29,153		30,191
Level 3 | Japan | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year		48,410	[2]	71,606
Return on assets held at end of year		4,199		(648)
Purchases, sales, and settlements, net		(4,182)		(22,548)
Transfers, net		(1,043)
Fair value of plan assets at end of the fiscal year	[2]	47,384		48,410
Level 3 | Japan | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year		25,371	[3]	21,392
Return on assets held at end of year		1,558		418
Purchases, sales, and settlements, net		178		3,561
Transfers, net		(1,598)
Fair value of plan assets at end of the fiscal year	[3]	25,509		25,371
Level 3 | Foreign plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year		34,475		34,583
Return on assets held at end of year		(4,306)		691
Purchases, sales, and settlements, net		120,164		382
Other	[5]	2,445		(1,181)
Fair value of plan assets at end of the fiscal year		152,778		34,475
Level 3 | Foreign plans | Real estate and other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year		22,297	[3]	22,089
Return on assets held at end of year		(402)		132
Purchases, sales, and settlements, net		(19,605)		755
Other	[5]	1,401		(679)
Fair value of plan assets at end of the fiscal year	[3]	3,691		22,297
Level 3 | Foreign plans | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of the fiscal year		12,178	[4]	12,494
Return on assets held at end of year		(3,904)		559
Purchases, sales, and settlements, net		139,769		(373)
Other	[5]	1,044		(502)
Fair value of plan assets at end of the fiscal year	[4]	¥ 149,087		¥ 12,178
[1]	Includes multiple private equity funds of funds that primarily invest in venture, buyout, and distressed markets in the United States and Europe.
[2]	Includes primarily funds that invest in a portfolio of a broad range of hedge funds to diversify the risks and reduce the volatilities associated with a single hedge fund.
[3]	Includes primarily private real estate investment trusts.
[4]	Represents annuity contracts with or without profit sharing.
[5]	Primarily consists of translation adjustments.

Pension and Severance Plans (Ex

Pension and Severance Plans (Expected Future Benefit Payments) (Detail) ¥ in Millions	Mar. 31, 2021JPY (¥)
Japan
Defined Benefit Plan Disclosure [Line Items]
2022	¥ 38,662
2023	36,885
2024	38,468
2025	37,414
2026	37,947
2027 - 2031	183,084
Foreign plans
Defined Benefit Plan Disclosure [Line Items]
2022	106,434
2023	12,742
2024	13,063
2025	13,633
2026	13,735
2027 - 2031	¥ 76,482

Pension and Severance Plans (To

Pension and Severance Plans (Total Defined Contribution Expenses) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Japan
Defined Contribution Plan Disclosure [Line Items]
Defined contribution expenses	¥ 10,992	¥ 6,925	¥ 3,353
Foreign plans
Defined Contribution Plan Disclosure [Line Items]
Defined contribution expenses	¥ 9,639	¥ 10,313	¥ 11,602

Stockholders' Equity (Changes i

Stockholders' Equity (Changes in Number of Shares of Common Stock Issued and Outstanding) (Detail) - shares	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Equity [Abstract]
Common stock, shares issued, beginning balance	1,261,058,781	1,271,230,341	1,266,552,149
Issuance of new shares		184,900	149,900
Exercise of stock acquisition rights		2,294,900	4,525,300
Conversion of convertible bonds		86,040	2,992
Cancellation of treasury stock		(12,737,400)
Common stock, shares issued, ending balance	1,261,058,781	1,261,058,781	1,271,230,341

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) ¥ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021JPY (¥)shares	Mar. 31, 2020JPY (¥)shares	Mar. 31, 2020USD ($)shares	Mar. 31, 2019JPY (¥)	Mar. 31, 2019USD ($)	Mar. 26, 2020shares
Stockholders Equity Note [Line Items]
Common stock shares would be issued upon conversion or exercise of all convertible bonds and stock acquisition rights outstanding | shares	22,289,133
Number of shares repurchased | shares		33,059,200	33,059,200
Stock repurchase amount		¥ 199,999
Retained earnings available for dividends to shareholders	¥ 913,889
Undistributed earnings of affiliated companies accounted for by equity method	71,417	61,226
Cash consideration for acquisition	366	¥ 200,211		¥ 100,177
Sony Financial Holdings Inc [Member]
Stockholders Equity Note [Line Items]
Cash consideration for acquisition	396,698
Decrease in the carrying amount of the noncontrolling interests due to acquisition	622,364
Increase in accumulated other comprehensive income due to acquisition	30,203
Increase to additional paid-in capital due to acquisition	¥ 195,463
Treasury Stock [Member]
Stockholders Equity Note [Line Items]
Number of treasury stocks retired during the period | shares						12,737,400
Nile Acquisition LLC
Stockholders Equity Note [Line Items]
Percentage of equity ownership				25.10%	25.10%
Businesses acquisition payment of cash consideration | $					$ 287.5
Decrease to additional paid-in capital resulting from difference between cash consideration paid and decrease in noncontrolling interests | $					$ 295.9
Game Show Network, LLC [Member]
Stockholders Equity Note [Line Items]
Percentage of equity ownership		42.00%
Businesses acquisition payment of cash consideration		¥ 53,992	$ 496
Dividends distributed | $			$ 129

Stockholders' Equity (Changes_2

Stockholders' Equity (Changes in Accumulated Other Comprehensive Income, Net of Tax) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		¥ 4,789,535	¥ 4,436,690	¥ 3,647,157
Cumulative effect of ASU 2016-01				(2,118)
Other comprehensive income before reclassifications		9,921	(48,774)	22,063
Net other comprehensive income		15,692	43,772	28,992
Less: Other comprehensive income attributable to noncontrolling interests		(11,368)	14,082	7,390
Transactions with noncontrolling interests shareholders and other		(387,116)	(38,257)	(48,947)
Ending Balance		5,621,476	4,789,535	4,436,690
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(580,980)	(610,670)	(616,746)
Cumulative effect of ASU 2016-01				(15,526)
Amounts reclassified out of accumulated other comprehensive income	[1]	5,771	92,546	6,929
Transactions with noncontrolling interests shareholders and other		29,900
Ending Balance		(524,020)	(580,980)	(610,670)
Unrealized gains (losses) on securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		161,191	135,035	126,191
Cumulative effect of ASU 2016-01				(15,526)
Other comprehensive income before reclassifications		(102,588)	40,334	33,124
Amounts reclassified out of accumulated other comprehensive income	[1]	96	56	161
Net other comprehensive income		(102,492)	40,390	33,285
Less: Other comprehensive income attributable to noncontrolling interests		(11,971)	14,234	8,915
Transactions with noncontrolling interests shareholders and other		30,635
Ending Balance		101,305	161,191	135,035
Pension liability adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(235,520)	(310,457)	(296,444)
Other comprehensive income before reclassifications		2,358	(17,519)	(23,448)
Amounts reclassified out of accumulated other comprehensive income	[1]	10,607	92,490	9,488
Net other comprehensive income		12,965	74,971	(13,960)
Less: Other comprehensive income attributable to noncontrolling interests		3	34	53
Transactions with noncontrolling interests shareholders and other		(910)
Ending Balance		(223,468)	(235,520)	(310,457)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(509,872)	(435,229)	(445,251)
Other comprehensive income before reclassifications		107,661	(75,814)	10,071
Amounts reclassified out of accumulated other comprehensive income	[1]	(835)	(74)	(1,627)
Net other comprehensive income		106,826	(75,888)	8,444
Less: Other comprehensive income attributable to noncontrolling interests		1,183	(1,245)	(1,578)
Transactions with noncontrolling interests shareholders and other		(300)
Ending Balance		(404,529)	(509,872)	(435,229)
Unrealized gains (losses) on derivative instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		1,248	(19)	(1,242)
Other comprehensive income before reclassifications		5,571	1,193	2,316
Amounts reclassified out of accumulated other comprehensive income	[1]	(4,058)	74	(1,093)
Net other comprehensive income		1,513	1,267	1,223
Transactions with noncontrolling interests shareholders and other		475
Ending Balance		2,761	1,248	¥ (19)
Debt valuation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		1,973
Other comprehensive income before reclassifications		(3,081)	3,032
Amounts reclassified out of accumulated other comprehensive income	[1]	(39)
Net other comprehensive income		(3,120)	3,032
Less: Other comprehensive income attributable to noncontrolling interests		(583)	1,059
Ending Balance		¥ (89)	¥ 1,973
[1]	Foreign currency translation adjustments were transferred from accumulated other comprehensive income to net income as a result of a complete or substantially complete liquidation or sale of certain foreign subsidiaries and affiliates.

Stockholders' Equity (Reclassif

Stockholders' Equity (Reclassifications Out of Accumulated Other Comprehensive Income) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		¥ (5,072,596)	¥ (4,753,174)	¥ (5,150,750)
Interest		12,185	11,090	12,467
Income before income taxes		1,192,370	799,450	1,011,648
Tax expense or (benefit)		(995)	(177,190)	(45,098)
Net income attributable to Sony Group Corporation's stockholders		1,171,776	582,191	916,271
Amount reclassified from accumulated other comprehensive income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to Sony Group Corporation's stockholders		5,771	92,546	6,929
Amount reclassified from accumulated other comprehensive income (loss) | Unrealized gains (losses) on securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Financial services revenue		130	82	235
Income before income taxes		(5,097)	106	(1,093)
Tax expense or (benefit)		(34)	(26)	(74)
Net income attributable to Sony Group Corporation's stockholders		96	56	161
Amount reclassified from accumulated other comprehensive income (loss) | Unrealized gains (losses) on derivative instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales				(1,093)
Net sales		(5,382)	106
Interest		285
Tax expense or (benefit)		1,039	(32)
Net income attributable to Sony Group Corporation's stockholders		(4,058)	74	(1,093)
Amount reclassified from accumulated other comprehensive income (loss) | Pension liability adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pension liability adjustment	[1]	13,181	92,514	9,891
Tax expense or (benefit)		(2,574)	(24)	(403)
Net income attributable to Sony Group Corporation's stockholders		10,607	92,490	9,488
Amount reclassified from accumulated other comprehensive income (loss) | Foreign currency translation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Foreign currency translation adjustments		(835)	(74)	(1,627)
Net income attributable to Sony Group Corporation's stockholders		(835)	¥ (74)	¥ (1,627)
Amount reclassified from accumulated other comprehensive income (loss) | Debt Valuation Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Debt valuation adjustments		(39)
Net income attributable to Sony Group Corporation's stockholders		¥ (39)
[1]	The amortization of pension and postretirement benefit components is included in the computation of net periodic pension cost. Refer to Note 15.

Stockholders' Equity (Net Incom

Stockholders' Equity (Net Income Attributable to Sony Corporation's Stockholders and Transfers (to) from Noncontrolling Interests) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Equity [Abstract]
Net income attributable to Sony Group Corporation's stockholders	¥ 1,171,776	¥ 582,191	¥ 916,271
Transfers (to) from the noncontrolling interests:
Increase (decrease) in additional paid-in capital for purchase of additional shares in consolidated subsidiaries	196,002	16,372	(22,775)
Change from net income attributable to Sony Group Corporation's stockholders and transfers (to) from the noncontrolling interests	¥ 1,367,778	¥ 598,563	¥ 893,496

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans - Additional Information (Detail) - JPY (¥) ¥ / shares in Units, ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	¥ 8,927	¥ 5,958	¥ 5,499
Total cash received from exercise of stock acquisition rights plans	¥ 12,430	¥ 7,560	¥ 12,757
Stock Acquisition Rights Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation plan, vesting period	3 years
Weighted-average fair value per share of stock acquisition rights granted	¥ 2,207	¥ 1,864	¥ 1,593
Total intrinsic value of shares exercised under stock acquisition rights plan	¥ 15,202	¥ 7,575	¥ 13,325
Total unrecognized compensation expense	¥ 9,119
Total unrecognized compensation expense, weighted-average period to be recognized	2 years 21 days
Stock Acquisition Rights Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation plan, expiration period	10 years

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans (Weighted-Average Assumptions used to Determine Fair Value of Stock Acquisition Rights Granted) (Detail)		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Share-based Payment Arrangement [Abstract]
Risk-free interest rate		0.17%	0.70%	1.37%
Expected lives		5 years 4 months 28 days	5 years 8 months 23 days	5 years 11 months 23 days
Expected volatility	[1]	26.97%	29.30%	32.52%
Expected dividends		0.34%	0.32%	0.35%
[1]	Expected volatility was based on the historical volatilities of Sony Group Corporation’s common stock over the expected life of the stock acquisition rights.

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans (Summary of Activities Regarding Stock Acquisition Rights Plan) (Detail) - JPY (¥) ¥ / shares in Units, ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Number of shares
Exercised		2,294,900	4,525,300
Stock Acquisition Rights Plan
Number of shares
Outstanding at beginning of the fiscal year	12,876,700
Granted	4,534,600
Exercised	3,178,300
Forfeited or expired	210,600
Outstanding at end of the fiscal year	14,022,400	12,876,700
Exercisable at end of the fiscal year	5,800,700
Weighted average exercise price
Outstanding at beginning of the fiscal year	¥ 4,982
Granted	9,221
Exercised	3,911
Forfeited or expired	6,280
Outstanding at end of the fiscal year	6,653	¥ 4,982
Exercisable at end of the fiscal year	¥ 4,535
Weighted-average remaining life
Outstanding at end of the fiscal year	7 years 9 months 18 days
Exercisable at end of the fiscal year	6 years 4 months 2 days
Total intrinsic Value
Outstanding at end of the fiscal year	¥ 68,218
Exercisable at end of the fiscal year	¥ 38,794

Revenue - Schedule of Receivabl

Revenue - Schedule of Receivables, Contract Assets and Contract Liabilities (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2021	Mar. 31, 2020
Contract with customer, asset and liability
Receivables from contracts with customers	[1]	¥ 1,176,828	¥ 1,126,597
Contract assets	[1]	12,204	13,985
Contract liabilities	[2]	¥ 294,911	¥ 271,286
[1]	Receivables from contracts with customers and contract assets are included in the consolidated balance sheets as “Notes and accounts receivable, trade and contract assets” and “Other”, non-current.
[2]	Contract liabilities are included in the consolidated balance sheets as “Other”, both current and non-current.

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue From Contract With Customers [Line Items]
Revenue recognized related to contract liability	¥ 216,931	¥ 204,265
Revenue recognized related to performance obligation satisfied in previous period	¥ 76,405	61,706
Remaining performance obligation expected timing of satisfaction, description	Remaining (unsatisfied or partially unsatisfied) performance obligations represent future revenues not yet recorded for firm orders that have not yet been performed. Sony applies practical expedients to exclude certain information about the remaining performance obligations, primarily related to contracts with an expected original duration of less than one year, and sales-based or usage-based royalty revenue on licenses of intellectual property.
Remaining performance obligation expected timing of satisfaction, explanation	more than half are expected to be recognized within one year and substantially all within three years.
Amortization of contract costs	¥ 7,271	¥ 6,420
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-31 | Minimum
Revenue From Contract With Customers [Line Items]
Remaining performance obligation expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-31 | Maximum
Revenue From Contract With Customers [Line Items]
Remaining performance obligation expected timing of satisfaction	3 years

Revenue - Summary of Remaining

Revenue - Summary of Remaining Performance Obligations that are Unsatisfied (Detail) ¥ in Millions	Mar. 31, 2021JPY (¥)
Music
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	¥ 57,904	[1]
Others
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	47,211
Motion Pictures and Television Productions | Pictures
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	644,569	[2]
Media Networks | Pictures
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	¥ 20,346
[1]	Amount included in the Music segment primarily consists of minimum royalty guarantees or fixed fees in contracts related to license revenue for ongoing access to an evolving library of content. These contracts also include the potential for sales-based or usage-based royalties to exceed the minimum guarantees, and these additional royalties are excluded from the amount above, of which substantially all are recognized as revenue within three years.
[2]	For Motion Pictures and Television Productions in the Pictures segment, Sony has included all contracts regardless of duration.

Revenue - Schedule of Contract

Revenue - Schedule of Contract Costs (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Obtaining Contract
Capitalized Contract Cost [Line Items]
Capitalized contract cost	¥ 8,348	¥ 7,464

Restructuring Charges - Additio

Restructuring Charges - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Restructuring Charges [Line Items]
Restructuring and related activities, term description	The restructuring activities are generally short term in nature and are generally completed within one year of initiation.
Restructuring costs	¥ 25,715	¥ 24,710	¥ 33,005
Electronics Products & Solutions
Restructuring Charges [Line Items]
Restructuring costs	15,671	14,727	16,011
Manufacturing Sites and Sales Offices Overseas | Electronics Products & Solutions
Restructuring Charges [Line Items]
Restructuring costs	¥ 15,671	¥ 14,727	¥ 16,011

Restructuring Charges (Changes

Restructuring Charges (Changes in Accrued Restructuring Charges) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Accrued restructuring charges, beginning balance		¥ 26,558	¥ 32,841	¥ 23,674
Restructuring costs		25,715	24,710	33,005
Non-cash charges		(2,806)	(100)	(2,731)
Cash payments		(27,398)	(30,088)	(21,705)
Adjustments		(747)	(805)	598
Accrued restructuring charges, ending balance		21,322	26,558	32,841
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Accrued restructuring charges, beginning balance		24,638	25,740	19,486
Restructuring costs		19,669	22,957	24,449
Cash payments		(24,246)	(23,385)	(19,150)
Adjustments		(891)	(674)	955
Accrued restructuring charges, ending balance		19,170	24,638	25,740
Non-cash write-downs and disposals, net
Restructuring Cost and Reserve [Line Items]
Restructuring costs	[1]	2,806	100	2,731
Non-cash charges	[1]	(2,806)	(100)	(2,731)
Other associated costs
Restructuring Cost and Reserve [Line Items]
Accrued restructuring charges, beginning balance		1,920	7,101	4,188
Restructuring costs		3,240	1,653	5,825
Cash payments		(3,152)	(6,703)	(2,555)
Adjustments		144	(131)	(357)
Accrued restructuring charges, ending balance		¥ 2,152	¥ 1,920	¥ 7,101
[1]	Significant asset impairments excluded from restructuring charges are described in Note 13.

Restructuring Charges (Total Co

Restructuring Charges (Total Costs Incurred in Connection with Restructuring Programs by Segment) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring costs		¥ 25,715	¥ 24,710	¥ 33,005
Depreciation associated with restructured assets		161	256	86
Total		25,876	24,966	33,091
Game & Network Services
Restructuring Cost and Reserve [Line Items]
Restructuring costs		4,077
Depreciation associated with restructured assets		13
Total		4,090
Music
Restructuring Cost and Reserve [Line Items]
Restructuring costs		(1,043)	3,185	3,192
Total		(1,043)	3,185	3,192
Pictures
Restructuring Cost and Reserve [Line Items]
Restructuring costs		1,573	545	4,795
Total		1,573	545	4,795
Electronics Products & Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring costs		15,671	14,727	16,011
Depreciation associated with restructured assets				86
Total		15,671	14,727	16,097
Imaging & Sensing Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring costs		1,362
Total		1,362
All Other and Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs		4,075	6,253	9,007
Depreciation associated with restructured assets		148	256
Total		4,223	6,509	9,007
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring costs		19,669	22,957	24,449
Employee termination benefits | Game & Network Services
Restructuring Cost and Reserve [Line Items]
Restructuring costs		3,524
Employee termination benefits | Music
Restructuring Cost and Reserve [Line Items]
Restructuring costs		(1,139)	3,179	2,991
Employee termination benefits | Pictures
Restructuring Cost and Reserve [Line Items]
Restructuring costs		1,519	545	4,795
Employee termination benefits | Electronics Products & Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring costs		11,466	14,500	11,437
Employee termination benefits | Imaging & Sensing Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring costs		1,362
Employee termination benefits | All Other and Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs		2,937	4,733	5,226
Other associated costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	[1]	6,046	1,753	8,556
Other associated costs | Game & Network Services
Restructuring Cost and Reserve [Line Items]
Restructuring costs	[1]	553
Other associated costs | Music
Restructuring Cost and Reserve [Line Items]
Restructuring costs	[1]	96	6	201
Other associated costs | Pictures
Restructuring Cost and Reserve [Line Items]
Restructuring costs	[1]	54
Other associated costs | Electronics Products & Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring costs	[1]	4,205	227	4,574
Other associated costs | All Other and Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring costs	[1]	¥ 1,138	¥ 1,520	¥ 3,781
[1]	Other associated costs includes non-cash write-downs and disposals, net.

Supplemental Consolidated Sta_3

Supplemental Consolidated Statements of Income Information (Components of Other Operating (Income) Expense, Net) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Component Of Other Operating Income And Expense [Line Items]
(Gain) loss on purchase/sale of interests in subsidiaries and affiliates, net		¥ (16,895)	¥ (12,801)	¥ (1,557)
(Gain) loss on sale, disposal or impairment of assets, net	[1]	23,835	29,778	46,928
Other		528	(1,495)
Other operating (income) expense, net		¥ 7,468	(3,611)	(71,568)
AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd
Component Of Other Operating Income And Expense [Line Items]
Gain on remeasurement of AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd. shares	[2]		(1,827)
EMI Music Publishing
Component Of Other Operating Income And Expense [Line Items]
Gain on remeasurement of EMI shares	[2]			¥ (116,939)
SRE shares [Member]
Component Of Other Operating Income And Expense [Line Items]
Gain on remeasurement and sale of SRE shares	[3]		¥ (17,266)
[1]	Refer to Notes 9, 13 and 19.
[2]	Refer to Notes 5 and 24.
[3]	Refer to Note 5.

Supplemental Consolidated Sta_4

Supplemental Consolidated Statements of Income Information - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Components of Other Income (Expense) [Line Items]
Research and development costs	¥ 525,175	¥ 499,290	¥ 481,202
Advertising costs included in selling general and administrative expenses	260,068	359,458	385,500
Selling, general and administrative expenses	1,469,955	1,502,625	1,576,825
Shipping and Handling [Member]
Components of Other Income (Expense) [Line Items]
Selling, general and administrative expenses	¥ 82,708	¥ 46,196	¥ 51,757

Income Taxes (Components of Dom

Income Taxes (Components of Domestic and Foreign Income and Provision for Current and Deferred Income Taxes) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income before income taxes:
Sony Group Corporation and all subsidiaries in Japan	¥ 488,738	¥ 466,253	¥ 310,020
Foreign subsidiaries	703,632	333,197	701,628
Income before income taxes	1,192,370	799,450	1,011,648
Income taxes — Current:
Sony Group Corporation and all subsidiaries in Japan	81,706	105,755	82,081
Foreign subsidiaries	72,716	66,636	84,667
Current	154,422	172,391	166,748
Income taxes — Deferred:
Sony Group Corporation and all subsidiaries in Japan	(172,095)	9,421	17,907
Foreign subsidiaries	18,668	(4,622)	(139,557)
Deferred	(153,427)	4,799	(121,650)
Total income tax expense	¥ 995	¥ 177,190	¥ 45,098

Income Taxes (Reconciliation of

Income Taxes (Reconciliation of Statutory Tax Rate and Effective Tax Rate) (Detail)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Reconciliation of Effective Income Tax Rate [Line Items]
Statutory tax rate	31.50%	31.50%	31.50%
Non-deductible expenses	0.10%	0.30%	0.70%
Income tax credits	(1.20%)	(1.70%)	(1.60%)
Change in statutory tax rate and law	(0.10%)	(0.40%)	(0.30%)
Change in valuation allowances (other than the reversal of valuation allowance in U.S. and Japan national tax below)	(5.00%)	(8.10%)	2.30%
The reversal of valuation allowances in the U.S.	(5.50%)		(15.30%)
The reversal of valuation allowances relating to the national tax of Sony Group Corporation and its national tax filing group in Japan	(18.00%)
Change in deferred tax liabilities on undistributed earnings of foreign subsidiaries and corporate joint ventures	0.70%	0.20%	(0.10%)
Lower tax rate applied to life and non-life insurance business in Japan	(0.40%)	(0.60%)	(0.50%)
Foreign income tax differential	(5.00%)	(2.40%)	(6.40%)
Adjustments to tax reserves	(0.30%)	0.90%	(0.30%)
The remeasurement gain for the equity interest in EMI			(2.40%)
Japan controlled foreign company taxation	2.50%	5.30%	0.00%
Other	0.80%	(2.80%)	(3.10%)
Effective income tax rate	0.10%	22.20%	4.50%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - JPY (¥) ¥ in Millions	3 Months Ended		12 Months Ended			20 Months Ended	27 Months Ended
	Sep. 30, 2020	Dec. 31, 2018	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2017	Mar. 31, 2020
Income Taxes [Line Items]
Statutory tax rate			31.50%	31.50%	31.50%
Minimum base erosion anti abuse tax				10.00%	(6.25%)
Beat threshold percentage			3.00%	3.00%	3.00%
Net increase (decrease) in total valuation allowance	¥ 214,900	¥ 154,201	¥ 331,861	¥ 114,871	¥ 176,721
Valuation allowance			276,382	608,243			¥ 608,243
Undistributed earnings of foreign subsidiaries and corporate joint ventures not expected to be remitted, for which deferred income taxes have not been provided			910,802
Deferred tax liabilities not accounted for undistributed earnings			14,573
Gain on sale of subsidiary stock			61,544
Operating loss carryforwards for tax purposes			302,647	348,714			348,714
Operating loss carryforwards for tax purposes with no expiration period			107,935
Tax credit carryforwards			63,590	94,900			94,900
Tax credit carryforwards with no expiration period			17,742
Interest expense recorded			2,150	1,276	1,479
Penalties recorded			514	117	218
Liabilities recorded for the payments of interest			10,183	8,033	9,309		8,033
Liabilities recorded for the payments of penalties			4,458	¥ 4,971	¥ 4,855		¥ 4,971
Maximum unrecognized tax benefits expected reduction within the next 12 months			¥ 1,522
U.S. [Member]
Income Taxes [Line Items]
Statutory tax rate			21.00%		21.00%	35.00%	21.00%
Japan Tax Autority [Member] | National Taxes | JAPAN
Income Taxes [Line Items]
Valuation allowance			¥ 13,549
Japan Tax Autority [Member] | Local Taxes | JAPAN
Income Taxes [Line Items]
Valuation allowance			¥ 126,631
Earliest Tax Year
Income Taxes [Line Items]
Total net operating loss carryforwards expiration date			Mar. 31, 2022
Tax credit carryforwards expiration date			Mar. 31, 2022
Earliest Tax Year | Domestic country
Income Taxes [Line Items]
Tax years subject to examinations			2011
Earliest Tax Year | Foreign country
Income Taxes [Line Items]
Tax years subject to examinations			2006
Earliest Tax Year | Us Tax Authority [Member]
Income Taxes [Line Items]
Tax years subject to examinations			2017
Latest Tax Year
Income Taxes [Line Items]
Total net operating loss carryforwards expiration date			Mar. 31, 2024
Tax credit carryforwards expiration date			Mar. 31, 2030
Latest Tax Year | Domestic country
Income Taxes [Line Items]
Tax years subject to examinations			2020
Latest Tax Year | Foreign country
Income Taxes [Line Items]
Tax years subject to examinations			2020
Latest Tax Year | Us Tax Authority [Member]
Income Taxes [Line Items]
Tax years subject to examinations			2020

Income Taxes (Components of Def

Income Taxes (Components of Deferred Tax Assets and Liabilities) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020
Deferred tax assets:
Operating loss carryforwards for tax purposes	¥ 302,647	¥ 348,714
Accrued pension and severance costs	59,608	77,559
Amortization including film costs	45,506	65,349
Lease liabilities	91,186	100,720
Warranty reserves and accrued expenses	138,413	116,234
Future insurance policy benefits	44,023	42,056
Inventories	28,086	15,512
Depreciation	45,096	39,085
Tax credit carryforwards	63,590	94,900
Loss on equity securities	0	11,815
Allowance for credit losses	7,958	9,090
Impairment of investments	1,821	6,029
Deferred revenue	24,502	24,420
Other	167,255	122,591
Gross deferred tax assets	1,019,691	1,074,074
Less: Valuation allowance	(276,382)	(608,243)
Total deferred tax assets	743,309	465,831
Deferred tax liabilities:
Insurance acquisition costs	(187,155)	(170,868)
Future insurance policy benefits	(196,045)	(193,315)
Right-of-use assets	(85,244)	(96,970)
Unrealized gains on securities	(51,147)	(92,791)
Gain on equity securities	(109,218)	0
Intangible assets acquired through stock exchange offerings	(23,949)	(23,949)
Undistributed earnings of foreign subsidiaries and corporate joint ventures	(41,515)	(25,359)
Investment in M3	(41,347)	(38,303)
Other	(65,605)	(47,319)
Gross deferred tax liabilities	(902,600)	(804,997)
Net deferred tax liabilities	(159,291)	(339,166)
Pictures
Deferred tax liabilities:
Unbilled accounts receivable in the Pictures segment	(7,894)	(26,214)
EMI Music Publishing
Deferred tax liabilities:
Intangible assets acquired through stock exchange offerings	¥ (93,481)	¥ (89,909)

Income Taxes (Reconciliation _2

Income Taxes (Reconciliation of Beginning and Ending Gross Amounts of Unrecognized Tax Benefits) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Balance at beginning of the fiscal year	¥ 41,268	¥ 50,577	¥ 95,425
Reductions for tax positions of prior years	(761)	(331)	(31,396)
Additions for tax positions of prior years	52	162	3,094
Additions based on tax positions related to the current year	8,267	8,074	2,594
Settlements	(4,467)	(13,240)	(4,235)
Lapse in statute of limitations	(1,095)	(1,251)	(14,824)
Foreign currency translation adjustments	2,476	(2,723)	(81)
Balance at end of the fiscal year	45,740	41,268	50,577
Total net amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate	¥ 33,126	¥ 29,539	¥ 35,004

Reconciliation of the Differe_3

Reconciliation of the Differences between Basic and Diluted EPS (Reconciliation of the Differences between Basic and Diluted EPS) (Detail) - JPY (¥) ¥ / shares in Units, shares in Thousands, ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income attributable to Sony Group Corporation's stockholders for basic and diluted EPS computation	¥ 1,171,776	¥ 582,191	¥ 916,271
Weighted-average shares outstanding	1,230,480	1,234,408	1,266,592
Effect of dilutive securities:
Stock acquisition rights	4,820	3,853	4,088
Zero coupon convertible bonds	15,392	23,994	23,966
Weighted-average shares for diluted EPS computation	1,250,692	1,262,255	1,294,646
Basic EPS	¥ 952.29	¥ 471.64	¥ 723.41
Diluted EPS	¥ 936.90	¥ 461.23	¥ 707.74

Reconciliation of the Differe_4

Reconciliation of the Differences between Basic and Diluted EPS - Additional Information (Detail) - shares shares in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Potential shares of common stock upon the exercise of stock acquisition rights and convertible bonds excluded from the computation of diluted EPS		3,212	5,731
Antidilutive securities not excluded from computation of earnings per share amount	0

Variable Interest Entities (Sum

Variable Interest Entities (Summary of the Carrying Value of the Variable Interests) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2021	Apr. 01, 2020	Mar. 31, 2020
Variable Interest Entity [Line Items]
Carrying Amount, Assets		¥ 26,354,840	¥ 23,032,784	¥ 23,039,343
Maximum exposure to loss		1,122,942		924,450
Equity securities
Variable Interest Entity [Line Items]
Maximum exposure to loss	[1]	688,428		587,602
Securitized Products
Variable Interest Entity [Line Items]
Maximum exposure to loss		270,818		210,641
Foreign Corporate Bonds
Variable Interest Entity [Line Items]
Maximum exposure to loss	[2]	80,037		82,488
Other investments
Variable Interest Entity [Line Items]
Maximum exposure to loss		83,659		43,719
Marketable securities | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets		730,313		621,225
Marketable securities | Equity securities | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets	[1]	681,201		579,773
Marketable securities | Foreign Corporate Bonds | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets	[2]	49,011		41,452
Marketable securities | Other investments | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets		101
Securities investments and other | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets		351,067		274,159
Securities investments and other | Equity securities | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets	[1]	6,698		6,229
Securities investments and other | Securitized Products | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets		270,818		210,641
Securities investments and other | Foreign Corporate Bonds | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets	[2]	31,026		41,036
Securities investments and other | Other investments | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets		42,525		16,253
Prepaid expenses and other current assets | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets		21,000		21,000
Prepaid expenses and other current assets | Other investments | Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets		¥ 21,000		¥ 21,000
[1]	Equity securities include Investment funds.
[2]	Foreign corporate bonds include repackaged bonds.

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) ¥ in Millions, $ in Millions	Jan. 29, 2020JPY (¥)	Dec. 09, 2019JPY (¥)	Dec. 09, 2019USD ($)	Nov. 15, 2019JPY (¥)	Nov. 15, 2019USD ($)	Nov. 14, 2018JPY (¥)	Nov. 14, 2018USD ($)	Mar. 31, 2019JPY (¥)	Mar. 31, 2019USD ($)	Mar. 31, 2021JPY (¥)	Mar. 31, 2020JPY (¥)	Mar. 31, 2019JPY (¥)	Mar. 31, 2019USD ($)	Dec. 31, 2019	Dec. 19, 2019	Dec. 09, 2019USD ($)	Nov. 15, 2019USD ($)	Nov. 14, 2018USD ($)
Business Acquisition [Line Items]
Goodwill								¥ 768,552		¥ 827,149	¥ 783,888	¥ 768,552
Revenue										8,999,360	8,259,885	8,665,687
Operating income										971,865	845,459	894,235
Percentage of equity interest	50.00%													44.50%	56.30%
Other acquisitions
Business Acquisition [Line Items]
Business acquisition total consideration										21,674	6,853	7,743
Goodwill								5,773		19,954	6,778	5,773
Intangible assets acquired								4,422		¥ 6,237	¥ 2,301	4,422
EMI Music Publishing
Business Acquisition [Line Items]
Cash consideration for acquisition						¥ 257,168	$ 2,269
Step acquisition, percentage of equity interest acquired						60.00%												60.00%
Revenue								18,420	$ 167			28,871	$ 260
Operating income								¥ 4,522	$ 41			6,432	58
Step acquisition, percentage of equity ownership immediately before additional acquisition						40.00%												40.00%
Equity interest owned prior to acquisition at fair value												141,141	1,245
Recognized gain on remeasured equity interest												¥ 116,939	$ 1,032
Interest bearing debt amount						¥ 148,621												$ 1,311
Debt repayment						¥ 108,942	$ 961
Weighted average amortization period												43 years	43 years
Insomniac Games, Inc
Business Acquisition [Line Items]
Business acquisition total consideration				¥ 24,895	$ 229
Goodwill				17,945													$ 164
Intangible assets acquired				¥ 6,794													$ 62
Silvergate Media Group
Business Acquisition [Line Items]
Cash consideration for acquisition		¥ 21,017	$ 192
Goodwill		11,431														$ 106
Intangible assets acquired		¥ 3,387														$ 32
Silvergate Topco Limited
Business Acquisition [Line Items]
Step acquisition, percentage of equity interest acquired		100.00%														100.00%
Silvergate BP Bidco Limited
Business Acquisition [Line Items]
Step acquisition, percentage of equity interest acquired		31.00%														31.00%
Acquisition of equity interests in joint ventures in the life insurance business
Business Acquisition [Line Items]
Cash consideration for acquisition	¥ 18,750
Step acquisition, percentage of equity interest acquired	50.00%
Equity interest owned prior to acquisition at fair value	¥ 13,932
Recognized gain on remeasured equity interest	¥ 1,827
Percentage of equity interest	100.00%

Acquisitions - Summary of Purch

Acquisitions - Summary of Purchase Price Allocation (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Business Combination, Transactions [Line Items]
Goodwill	¥ 827,149	¥ 783,888	¥ 768,552
Measurement Period Adjustments [Member]
Business Combination, Transactions [Line Items]
Prepaid expenses and other current assets			(98)
Goodwill			(1,206)
Total assets			(1,304)
Accrued income and other taxes			(69)
Deferred income taxes			(1,235)
Total liabilities			(1,304)
Previously Reported [Member]
Business Combination, Transactions [Line Items]
Cash and cash equivalents			12,971
Notes and accounts receivable, trade and contract assets			32,287
Prepaid expenses and other current assets			10,220
Securities investments and other			1,476
Intangibles, net			420,534
Goodwill			237,271
Other			10,023
Total assets			724,782
Notes and accounts payable, trade			1,731
Accounts payable, other and accrued expenses			70,675
Accrued income and other taxes			3,082
Long-term debt			148,621
Accrued pension and severance costs			1,947
Deferred income taxes			94,849
Other			5,564
Total liabilities			326,469
Acquired Assets and Liabilities at Fair Value Final [Member]
Business Combination, Transactions [Line Items]
Cash and cash equivalents			12,971
Notes and accounts receivable, trade and contract assets			32,287
Prepaid expenses and other current assets			10,122
Securities investments and other			1,476
Intangibles, net			420,534
Goodwill			236,065
Other			10,023
Total assets			723,478
Notes and accounts payable, trade			1,731
Accounts payable, other and accrued expenses			70,675
Accrued income and other taxes			3,013
Long-term debt			148,621
Accrued pension and severance costs			1,947
Deferred income taxes			93,614
Other			5,564
Total liabilities			¥ 325,165
AEGON Sony Life Insurance Co., Ltd. and SA Reinsurance Ltd
Business Combination, Transactions [Line Items]
Cash and cash equivalents	27,380
Marketable securities	530,851
Prepaid expenses and other current assets	21,933
Securities investments and other	15,329
Goodwill	3,609
Other	406
Total assets	599,508
Future insurance policy benefits and other	66,599
Policyholders' account in the life insurance business	495,248
Other	4,979
Total liabilities	¥ 566,826

Acquisitions - Unaudited Supple

Acquisitions - Unaudited Supplemental Pro Forma Financial Information (Detail) - EMI Music Publishing ¥ / shares in Units, ¥ in Millions	12 Months Ended
	Mar. 31, 2019JPY (¥)¥ / shares
Net sales	¥ 8,738,209
Operating income	801,973
Net income attributable to Sony Group Corporation's stockholders	¥ 817,629
- Basic EPS | ¥ / shares	¥ 645.53
- Diluted EPS | ¥ / shares	¥ 631.55

Collaborative Arrangements - Ad

Collaborative Arrangements - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Cost of sales	¥ 5,072,596	¥ 4,753,174	¥ 5,150,750
Net sales	8,999,360	8,259,885	8,665,687
Pictures
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Net sales	¥ 757,580	1,010,714	985,270
Pictures | Collaborative Arrangements, Co-production and Distribution Arrangements
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaborative arrangement, income statement classification description	Sony and the other participants typically share in the profits from the distribution of the product in all media or markets. For motion pictures, if Sony is a net receiver of (1) Sony’s share of the profits from the media or markets distributed by the other participants less (2) the other participants’ share of the profits from the media or markets distributed by Sony then the net amount is recorded as net sales. If Sony is a net payer then the net amount is recorded in cost of sales. For television programming, Sony records its share of the profits from the media or markets distributed by the other participants as sales, and the other participants’ share of the profits from the media or markets distributed by Sony as cost of sales.
Cost of sales	¥ 19,944	33,921	42,343
Net sales	¥ 24,853	¥ 21,052	¥ 22,702

Commitments, Contingent Liabi_3

Commitments, Contingent Liabilities and Other - Additional Information (Detail) ¥ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021JPY (¥)	Dec. 31, 2020USD ($)
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding	¥ 811,400
Maximum potential amount of future payments under guarantees	529
Ellation Holdings Inc [Member]
Commitments and Contingencies Disclosure [Line Items]
Percentage of equity interest acquired		100.00%
Contractual obligation | $		$ 1,175
Financial Services
Commitments and Contingencies Disclosure [Line Items]
Unused portion of lines of credit extended to customers	37,322
Pictures
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding	¥ 105,921
Purchase commitments and other outstanding, term	3 years
Music
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding	¥ 149,021
Purchase commitments and other outstanding, term	5 years
Game & Network Services
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding	¥ 32,959
Purchase commitments and other outstanding, term	7 years
Advertising and Promotional Rights
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding	¥ 5,396
Purchase commitments and other outstanding, term	1 year
Fixed Assets
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding	¥ 135,297
Materials
Commitments and Contingencies Disclosure [Line Items]
Purchase commitments and other outstanding	¥ 96,589

Commitments, Contingent Liabi_4

Commitments, Contingent Liabilities and Other (Schedule of Aggregate Amounts of Year-by-Year Payment of Purchase Commitments) (Detail) ¥ in Millions	Mar. 31, 2021JPY (¥)
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2022	¥ 519,953
2023	112,975
2024	66,939
2025	53,358
2026	13,786
Later fiscal years	44,389
Total	¥ 811,400

Commitments, Contingent Liabi_5

Commitments, Contingent Liabilities and Other (Changes in Product Warranty Liability) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of the fiscal year	¥ 31,807	¥ 33,005	¥ 44,717
Additional liabilities for warranties	19,560	21,448	23,041
Settlements (in cash or in kind)	(19,666)	(21,491)	(26,326)
Changes in estimate for pre-existing warranty reserve	(860)	(562)	(7,370)
Translation adjustments	2,010	(593)	(1,057)
Balance at end of the fiscal year	¥ 32,851	¥ 31,807	¥ 33,005

Business Segment Information (C

Business Segment Information (Components of Segment Sales and Operating Revenue) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	¥ 8,999,360	¥ 8,259,885	¥ 8,665,687
Game & Network Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	2,604,713	1,919,760	2,224,622
Music
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	927,250	838,592	795,025
Pictures
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	757,580	1,010,714	985,270
Electronics Products & Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	1,902,887	1,969,880	2,303,167
Imaging & Sensing Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	937,859	985,259	770,622
Financial Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	1,661,520	1,299,847	1,274,708
All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	196,517	214,999	299,806
Intersegment | Game & Network Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	51,565	57,791	86,250
Intersegment | Music
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	12,617	11,317	12,464
Intersegment | Pictures
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	1,187	1,140	1,603
Intersegment | Electronics Products & Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	17,843	21,388	17,461
Intersegment | Imaging & Sensing Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	74,638	85,317	108,708
Intersegment | Financial Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	7,401	7,901	7,831
Intersegment | All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	32,736	36,421	45,931
Operating Segments | Game & Network Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	2,656,278	1,977,551	2,310,872
Operating Segments | Music
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	939,867	849,909	807,489
Operating Segments | Pictures
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	758,767	1,011,854	986,873
Operating Segments | Electronics Products & Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	1,920,730	1,991,268	2,320,628
Operating Segments | Imaging & Sensing Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	1,012,497	1,070,576	879,330
Operating Segments | Financial Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	1,668,921	1,307,748	1,282,539
Operating Segments | All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	229,253	251,420	345,737
Corporate and Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales and operating revenue, Total	¥ (186,953)	¥ (200,441)	¥ (267,781)

Business Segment Information _2

Business Segment Information (Components of Segment Profit or Loss) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	¥ 971,865	¥ 845,459	¥ 894,235
Other income	264,235	21,949	144,735
Other expenses	(43,730)	(67,958)	(27,322)
Consolidated income before income taxe	1,192,370	799,450	1,011,648
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	1,071,732	917,647	968,910
Operating Segments | Game & Network Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	342,192	238,400	311,092
Operating Segments | Music
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	188,056	142,345	232,487
Operating Segments | Pictures
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	80,478	68,157	54,599
Operating Segments | Electronics Products & Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	139,180	87,276	76,508
Operating Segments | Imaging & Sensing Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	145,876	235,584	143,874
Operating Segments | Financial Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	164,582	129,597	161,477
Operating Segments | All Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	11,368	16,288	(11,127)
Corporate and Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	¥ (99,867)	¥ (72,188)	¥ (74,675)

Business Segment Information -

Business Segment Information - Additional Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Operating income (loss)	¥ 971,865	¥ 845,459	¥ 894,235
Electronics Products & Solutions | Mobile Communications
Segment Reporting Information [Line Items]
Operating income (loss)	¥ 27,671	¥ (21,057)	¥ (97,136)

Business Segment Information _3

Business Segment Information (Components of Other Significant Items) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in net income (loss) of affiliated companies	¥ 11,487	¥ 9,637	¥ (2,999)
Depreciation and amortization	390,693	416,642	374,026
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation and amortization	23,217	27,617	31,049
Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Depreciation and amortization	367,476	389,025	342,977
Operating Segments | Game & Network Services
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in net income (loss) of affiliated companies	0
Depreciation and amortization	38,707	29,135	29,023
Operating Segments | Music
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in net income (loss) of affiliated companies	570	4,239	(6,915)
Depreciation and amortization	30,666	29,137	21,259
Operating Segments | Pictures
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in net income (loss) of affiliated companies	123	(629)	106
Depreciation and amortization	19,330	21,665	24,081
Operating Segments | Electronics Products & Solutions
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in net income (loss) of affiliated companies	(36)	136	(38)
Depreciation and amortization	62,145	63,291	61,749
Operating Segments | Imaging & Sensing Solutions
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in net income (loss) of affiliated companies	(123)	0
Depreciation and amortization	152,380	134,035	110,746
Operating Segments | Financial Services
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in net income (loss) of affiliated companies	0	(104)	(682)
Depreciation and amortization	59,885	106,667	91,179
Operating Segments | All Other
Segment Reporting, Other Significant Reconciling Item [Line Items]
Equity in net income (loss) of affiliated companies	10,953	5,995	4,530
Depreciation and amortization	¥ 4,363	¥ 5,095	¥ 4,940

Business Segment Information (S

Business Segment Information (Sales and Operating Revenue to External Customers by Product Category) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	¥ 8,999,360	¥ 8,259,885	¥ 8,665,687
Game & Network Services
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	2,604,713	1,919,760	2,224,622
Game & Network Services | Digital Software and Add-on Content [Member]
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	1,454,654	1,010,296	1,102,231
Game & Network Services | Network Services
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	382,950	337,265	326,524
Game & Network Services | Hardware and Others [Member]
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	767,109	572,199	795,867
Music
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	927,250	838,592	795,025
Music | Recorded Music — Streaming [Member]
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	337,100	276,039	227,513
Music | Recorded Music — Others [Member]
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	179,167	191,114	199,413
Music | Music Publishing
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	156,862	157,478	106,666
Music | Visual Media and Platform
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	254,121	213,961	261,433
Pictures
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	757,580	1,010,714	985,270
Pictures | Motion Pictures
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	271,081	475,061	436,017
Pictures | Television Productions
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	267,123	301,224	288,816
Pictures | Media Networks
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	219,376	234,429	260,437
Electronics Products & Solutions
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	1,902,887	1,969,880	2,303,167
Electronics Products & Solutions | Televisions
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	709,007	646,513	788,423
Electronics Products & Solutions | Audio and Video
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	313,975	346,060	362,580
Electronics Products & Solutions | Other Products and Services
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	182,631	231,021	243,328
Electronics Products & Solutions | Still and Video Cameras
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	338,694	384,142	421,506
Electronics Products & Solutions | Mobile Communications
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	358,580	362,144	487,330
Imaging & Sensing Solutions
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	937,859	985,259	770,622
Financial Services
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	1,661,520	1,299,847	1,274,708
All Other
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	196,517	214,999	299,806
Corporate
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	¥ 11,034	¥ 20,834	¥ 12,467

Business Segment Information _4

Business Segment Information (Sales and Operating Revenue Attributed to Countries Based on Location of Customers and Long-Lived Assets) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	¥ 8,999,360	¥ 8,259,885	¥ 8,665,687
Property, plant and equipment, net and right-of-use assets	1,362,528	1,301,254
Japan
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	2,962,465	2,472,479	2,591,784
Property, plant and equipment, net and right-of-use assets	999,280	946,922
United States
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	2,153,466	1,864,390	1,982,135
Property, plant and equipment, net and right-of-use assets	211,109	214,226
Europe
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	1,816,244	1,697,791	1,862,166
Property, plant and equipment, net and right-of-use assets	74,313	67,799
China
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	762,766	845,235	770,416
Property, plant and equipment, net and right-of-use assets	16,976	17,996
Asia Pacific
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	861,623	892,026	912,193
Property, plant and equipment, net and right-of-use assets	48,515	46,932
Other Areas
Revenue from External Customer [Line Items]
Sales and operating revenue, Total	442,796	487,964	¥ 546,993
Property, plant and equipment, net and right-of-use assets	¥ 12,335	¥ 7,379

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Subsequent event ¥ in Millions, shares in Millions, $ in Millions	May 18, 2021JPY (¥)	May 18, 2021USD ($)	Apr. 28, 2021JPY (¥)shares
Subsequent Event [Line Items]
Number of shares for repurchase | shares			25
Total purchase price for repurchase | ¥			¥ 200,000
Sony Music Entertainment [Member]
Subsequent Event [Line Items]
Percentage of equity interest acquired	100.00%	100.00%
Business acquisition total consideration	¥ 49,794	$ 456
Minimum
Subsequent Event [Line Items]
Period of repurchase			Apr. 30, 2021
Maximum
Subsequent Event [Line Items]
Period of repurchase			Apr. 28, 2022

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Allowance for doubtful accounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	¥ 25,873	¥ 25,440	¥ 48,663
Beginning adjustment	6,621		(25,114)
Additions	12,133	9,006	7,112
Deductions	(8,115)	(6,908)	(5,532)
Other	1,313	(1,665)	311
Balance at end of period	37,825	25,873	25,440
Valuation allowance - Deferred tax assets
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	608,243	723,114	899,835
Additions	41,816	53,245	116,938
Deductions	(379,661)	(161,547)	(309,226)
Other	5,984	(6,569)	15,567
Balance at end of period	¥ 276,382	¥ 608,243	¥ 723,114