Kanrin Maru (咸臨丸, Unyielding) was Japan's first sail and screw-driven steam corvette. She was ordered in 1853 from the Netherlands, the only Western country with which Japan had diplomatic relations throughout its period of sakoku (seclusion), by the shōgun's government, the Bakufu. She was delivered on September 21, 1857, by Lt. Willem Huyssen van Kattendijke of the Dutch navy. The ship was used at the newly established Naval School of Nagasaki in order to build up knowledge of Western warship technology.

Count Katsu Yasuyoshi was a Japanese statesman, naval engineer and military commander during the late Tokugawa shogunate and early Meiji period.