As filed with the Securities and Exchange Commission on December 30, 2025.

Registration No. 333-283930

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

POST-EFFECTIVE AMENDMENT NO. 1 TO THE

FORM F-6

REGISTRATION STATEMENT

under

THE SECURITIES ACT OF 1933

For Depositary Shares

Hachijuni Nagano Bank, Ltd.

(f/k/a The Hachijuni Bank, Ltd.)

(Exact name of issuer of deposited securities as specified in its charter)

N/A

(Translation of issuer’s name into English)

Japan

(Jurisdiction of incorporation or organization of issuer)

THE BANK OF NEW YORK MELLON

(Exact name of depositary as specified in its charter)

240 Greenwich Street, New York, N.Y. 10286

Telephone (212) 495-1784

(Address, including zip code, and telephone number, including area code, of depositary’s principal executive offices)

The Bank of New York Mellon

Legal Department

240 Greenwich Street

New York, New York 10286

(212) 495-1784

(Address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Brian D. Obergfell, Esq.

Emmet, Marvin & Martin, LLP120 BroadwayNew York, New York 10271(212) 238-3032

It is proposed that this filing become effective under Rule 466

☐ immediately upon filing

☒ on January 2, 2026 at 8:30 A.M. EST

If a separate registration statement has been filed to register the deposited shares, check the following box. ☐

The prospectus consists of the proposed Form of American Depositary Receipt and Statement of Terms and Conditions filed as Exhibit 1 to this Registration Statement, which is incorporated herein by reference.