- Other Names: Emperor
- Japanese: 蟠龍丸 (Banryuu-maru)
The Banryû-maru was a steam yacht, according to some sources a pleasure craft, given to the Tokugawa shogunate by James Bruce, 8th Earl of Elgin in 1858 as a gift from Queen Victoria. Originally known as the Emperor, it was later renamed Banryû-maru.
- Mitani Hiroshi, David Noble (trans.), Escape from Impasse, International House of Japan (2006), 283.; Ishin Shiryô Kôyô 維新史料綱要, vol 2 (1937), 596.