Kameyama Shachū Memorial Museum
The Kaientai (海援隊 Kaientai, "Maritime Support Group") was a trading and shipping company and private navy, considered to be the first corporation in modern Japan.
Kaientai, originally named Kameyama Shachū (亀山社中, "Kameyama Company"), was founded by Sakamoto Ryōma in Nagasaki in 1865 during the Bakumatsu, and it was initially funded by the Satsuma Domain and other groups and domains.
Members of Kaientai
Kaientai members, around January 1867. From left: Nagaoka Kenkichi, Mizobuchi Hironojō, Sakamoto Ryōma, Yamamoto Kōdō, Sugano Kakubei, Shiramine Shunme.
Born in Tosa Domain
- Sakamoto Ryōma – a commanding officer of Kaientai
- Sawamura Sōnojho
- Sasaki Takayuki – a second commanding officer of Kaientai after Ryōma's death
- Nagaoka Ken'ichi
- Ishida Eikichi
- Sakamoto Nao – Ryōma's adopted child
- Sugano Kakubei
- Jingū Umanosuke
- Nomura Koreaki
Born in Echizen Province
- Seki Yoshiomi
- Watanabe Gōhachi
- Odani Kōzō
Born in Kishū Domain
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