Cover - USD ($)	12 Months Ended
Cover - USD ($)	Dec. 31, 2025	Mar. 30, 2026	Jun. 30, 2025
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2025
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2025
Current Fiscal Year End Date	--12-31
Entity File Number	001-42732
Entity Registrant Name	ORIGIN INVESTMENT CORP I
Entity Central Index Key	0002044523
Entity Tax Identification Number	00-0000000
Entity Incorporation, State or Country Code	E9
Entity Address, Address Line One	CapitaGreen
Entity Address, Address Line Two	Level 24
Entity Address, City or Town	138 Market St
Entity Address, Country	SG
Entity Address, Postal Zip Code	043946
City Area Code	+65
Local Phone Number	7825-5768
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
Elected Not To Use the Extended Transition Period	false
Entity Shell Company	true
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding		8,625,000
Documents Incorporated by Reference [Text Block]	None
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Auditor Firm ID	100
Auditor Name	WithumSmith+Brown, PC
Auditor Location	New York, New York
Units, Each Consisting of One Ordinary Share, $0.0001 Par Value, And One-Half Of One Redeemable Warrant [Member]
Title of 12(b) Security	Units, each consisting of one ordinary share, $0.0001 par value, and one-half of one redeemable warrant
Trading Symbol	ORIQU
Security Exchange Name	NASDAQ
Ordinary Shares, $0.0001 Par Value Per Share [Member]
Title of 12(b) Security	Ordinary shares, $0.0001 par value per share
Trading Symbol	ORIQ
Security Exchange Name	NASDAQ
Redeemable Warrants Included as Part of The Units, Each Whole Warrant Exercisable For One Ordinary Share At An Exercise Price Of $11.50 [Member]
Title of 12(b) Security	Redeemable warrants included as part of the units, each whole warrant exercisable for one ordinary share at an exercise price of $11.50
Trading Symbol	ORIQW
Security Exchange Name	NASDAQ

Origin Investment Corp I 10-K