v3.26.1
Cover
Apr. 20, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Apr. 20, 2026
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, City or Town Singapore
Entity Address, Country SG
Entity Address, Postal Zip Code 049712
City Area Code +1
Local Phone Number 949 899 1827
Written Communications true
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