OREX (Orbital Re-Entry EXperiment) was a NASDA reentry demonstrator prototype which was launched in 1994 on the H-II launcher and the satellite was renamed Ryūsei(りゅうせい,Shooting star?). It was a precursor for the Japanese space Shuttle Hope.
OREX tested various communications systems, heating profiles and heat shielding components for Hope.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.