| Cover | Dec. 07, 2023 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 07, 2023 |
| Entity File Number | 001-40318 |
| Entity Registrant Name | ASPAC II Acquisition Corp. |
| Entity Central Index Key | 0001876716 |
| Entity Tax Identification Number | 00-0000000 |
| Entity Incorporation, State or Country Code | D8 |
| Entity Address, Address Line One | 289 Beach Road |
| Entity Address, Address Line Two | #03-01 |
| Entity Address, Country | SG |
| Entity Address, Postal Zip Code | 199552 |
| City Area Code | 65 |
| Local Phone Number | 6818 5796 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Units Each Consisting Of One Class Ordinary Share With No Par Value Onehalf Of One Redeemable Warrant And One Right To Receive Onetenth Of One Class Ordinary Share [Member] | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share, with no par value, |
| Trading Symbol | ASCBU |
| Security Exchange Name | NASDAQ |
| Class Ordinary Shares Included As Part Of Units [Member] | |
| Title of 12(b) Security | Class A ordinary shares included as part of the units |
| Trading Symbol | ASCB |
| Security Exchange Name | NASDAQ |
| Rights Included As Part Of Units [Member] | |
| Title of 12(b) Security | Rights included as part of the units |
| Trading Symbol | ASCBR |
| Security Exchange Name | NASDAQ |
| Warrants Included As Part Of Units [Member] | |
| Title of 12(b) Security | Warrants included as part of the units |
| Trading Symbol | ASCBW |
| Security Exchange Name | NASDAQ |
