Artist's concept of Kankoh-maru
FunctionCrewed re-usable rocket
Country of originJapan
Height23.5 m (77 ft)[1]
Diameter18 m (59 ft)[1]
Mass550 t (1,210,000 lb)[1]
Payload to LEO
Mass50 t (110,000 lb)[2]
Launch history
First stage
Thrust6,888,000 N (1,548,000 lbf) [1]
Total thrust2,900,000 N (650,000 lbf) [1]

The Kankoh-maru (観光丸, Kankōmaru) is 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.[1]


The concept was created by the Japanese Rocket Society [ja] in 1993.[3] This development cost was estimated ¥3.8 billion (1995) (US$40.4 million) in 1995.[4]

The name Kankō Maru is derived from the first steam-powered vessel in Edo-era Japan.[3]

See also


  1. ^ a b c d e f Anderson, Erik (July 1997). "Kankoh-maru Flight Manual". Space Future. Retrieved 2012-08-04.
  2. ^ "Kankoh Maru". Retrieved January 28, 2023.
  3. ^ a b c Isozaki, Kohki; Yonemoto, Koichi; Kitayama, Osamu; Miyahara, Akira; Watanabe, Hiroyuki; Okaya, Shunichi; Ibusuki, Masayuki (1998). "Status Report on Space Tour Vehicle "Kankoh-maru" of Japanese Rocket Society". International Astronautical Federation 1998. Retrieved January 28, 2023.
  4. ^ 準軌道宇宙旅行 宇宙丸 - 観光丸 [Suborbital space tourism Uchumaru - Kankoh-maru] (in Japanese). 2005-04-11. Retrieved 2011-07-24.