
Kankoh-maru

The is the name of a proposed vertical takeoff and landing (VTVL), single-stage-to-orbit (SSTO), reusable launch system (rocket-powered spacecraft). According to a document from July 1997, it would have been manufactured by Kawasaki Heavy Industries and Mitsubishi Heavy Industries, with its formal name being the Kawasaki S-1.
Overview.
The concept was created by the in 1993. This development cost was estimated ¥2.67 trillion ($28 billion) in 1995.
The name "Kankō Maru" is derived from the first steam-powered vessel in Edo-era Japan.