Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Dec. 31, 2025	Mar. 31, 2026	Jun. 30, 2025
Document Information Line Items
Entity Central Index Key	0002035016
Document Type	10-K/A
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2025
Document Fiscal Year Focus	2025
Document Transition Report	false
Entity File Number	001-42474
Entity Registrant Name	Ribbon Acquisition Corporation
Entity Incorporation, State or Country Code	E9
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	Central Park Tower LaTour Shinjuku Room 3001
Entity Address, Address Line Two	6-15-1 Nishi Shinjuku
Entity Address, City or Town	Shinjuku-ku Tokyo
Entity Address, Postal Zip Code	160-0023
Entity Address, Country	JP
City Area Code	+81
Local Phone Number	9085083462
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	true
Entity Common Stock, Shares Outstanding		4,793,446
Amendment Description	This Amendment No. 1 to the Annual Report on Form 10-K (this “Amendment”) amends the Annual Report on Form 10-K of Ribbon Acquisition Corporation (the “Company”) for the fiscal year ended December 31, 2025, as originally filed with the Securities and Exchange Commission on March 31, 2026 (the “Original Filing”).This Amendment is being filed solely to include the Company’s Clawback Policy as Exhibit 97.1 to the Original Filing.No other changes have been made to the Original Filing. This Amendment does not reflect events occurring after the filing of the Original Filing and does not modify or update the disclosures contained in the Original Filing in any way other than as described above.
Amendment Flag	true
Document Fiscal Period Focus	FY
Entity Public Float			$ 0
Units, each consisting of one Class A Ordinary Share, par value $0.0001 per share and one Right
Document Information Line Items
Title of 12(b) Security	Units, each consisting of one Class A Ordinary Share, par value $0.0001 per share and one Right
Trading Symbol	RIBBU
Security Exchange Name	NASDAQ
Class A Ordinary Shares, par value $0.0001 per share
Document Information Line Items
Title of 12(b) Security	Class A Ordinary Shares, par value $0.0001 per share
Trading Symbol	RIBB
Security Exchange Name	NASDAQ
Rights, each entitling the holder to receive one-seventh (1/7) of one Class A Ordinary Share
Document Information Line Items
Title of 12(b) Security	Rights, each entitling the holder to receive one-seventh (1/7) of one Class A Ordinary Share
Trading Symbol	RIBBR
Security Exchange Name	NASDAQ

Ribbon Acquisition Corp. 10-K/A