v3.26.1
Cover
Mar. 24, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 24, 2026
Entity File Number 001-42406
Entity Registrant Name HORIZON SPACE ACQUISITION II CORP.
Entity Central Index Key 0002032950
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 1412 Broadway
Entity Address, Address Line Two 21st Floor
Entity Address, Address Line Three Suite 21V
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10018
City Area Code 646
Local Phone Number 257-5537
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-tenth 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-tenth of one ordinary share
Trading Symbol HSPTU
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 HSPT
Security Exchange Name NASDAQ
Rights, each whole right to acquire one-tenth of one ordinary share  
Title of 12(b) Security Rights, each whole right to acquire one-tenth of one ordinary share
Trading Symbol HSPTR
Security Exchange Name NASDAQ