Cover - USD ($)	7 Months Ended
	Dec. 31, 2022	Feb. 13, 2023	Jun. 30, 2022
Cover [Abstract]
Entity Registrant Name	HORIZON SPACE ACQUISITION I CORP.
Entity Central Index Key	0001946021
Document Type	10-K
Amendment Flag	false
Entity Voluntary Filers	No
Current Fiscal Year End Date	--12-31
Entity Well Known Seasoned Issuer	No
Entity Small Business	true
Entity Shell Company	true
Entity Emerging Growth Company	true
Entity Current Reporting Status	Yes
Document Period End Date	Dec. 31, 2022
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Entity Ex Transition Period	false
Entity Common Stock Shares Outstanding		9,210,750
Entity Public Float			$ 0
Document Annual Report	true
Document Transition Report	false
Entity File Number	001-41578
Entity Incorporation State Country Code	E9
Entity Address Address Line 1	1412 Broadway
Entity Address Address Line 2	21st Floor
Entity Address Address Line 3	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
Entity Interactive Data Current	Yes
Auditor Firm Id	1195
Auditor Name	UHY LLP
Auditor Location	New York, New York