0001946021 2026-07-20 2026-07-20 0001946021 hspo:UnitConsistingOfOneOrdinarySharesMember 2026-07-20 2026-07-20 0001946021 hspo:OrdinarySharesMember 2026-07-20 2026-07-20 0001946021 hspo:RedeemableWarrantsMember 2026-07-20 2026-07-20 0001946021 hspo:RightsEachWholeRightToAcquireMember 2026-07-20 2026-07-20 0001946021 false 8-K 2026-07-20 HORIZON SPACE ACQUISITION I CORP. E9 001-41578 1412 Broadway 21st Floor Suite 21V New York NY 10018 646 257-5537 false false false false Units, consisting of one Ordinary Share, $0.0001 par value HSPUF Ordinary Shares, par value $0.0001 per share HSPOF Redeemable Warrants, each whole warrant exercisable for one Ordinary Share at an exercise price of $11.50 HSPWF Rights, each whole right to acquire one-tenth of one Ordinary Share HSPRF true false