Japan's National Aerospace Laboratory (NAL) was conducting research for a possible future Japanese aero-spaceplane.
Power plant: LACE (liquified air-cycle engine) for low speeds and in vacuum (operation as a rocket engine in vacuum); scramjet for high-speed within Earth atmosphere.
Accomodation: Capacity for 10 persons
Specifications:
Length overall: approx. 94.0m (308 ft.)
Fuselage weight: approx. 110,000 kg (242,500 lb)
Max-T-O weight: approx. 350,00 kg (771,625 lb)
Source: Jane's All the World's Aircraft 1995-1996