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Cover
Jan. 16, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Jan. 16, 2026
Current Fiscal Year End Date --12-31
Entity File Number 001-42485
Entity Registrant Name Columbus Acquisition Corp/Cayman Islands
Entity Central Index Key 0002028201
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 14 Prudential Tower
Entity Address, Country SG
Entity Address, Postal Zip Code 049712
City Area Code +1
Local Phone Number 949 899 1827
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, consisting of one ordinary share, $0.0001 par value, and one Right to acquire one-seventh of one ordinary share  
Title of 12(b) Security Units, consisting of one ordinary share, $0.0001 par value, and one Right to acquire one-seventh of one ordinary share
Trading Symbol COLAU
Security Exchange Name NASDAQ
Ordinary shares, par value $0.0001 per share  
Title of 12(b) Security Ordinary shares, par value $0.0001 per share
Trading Symbol COLA
Security Exchange Name NASDAQ
Rights, each whole right to acquire one-seventh of one ordinary share  
Title of 12(b) Security Rights, each whole right to acquire one-seventh of one ordinary share
Trading Symbol COLAR
Security Exchange Name NASDAQ