Sakaguchi Sentoku II
阪口仙得 (1801-1867?) Yasui pupil, one of the Tempo Four (in Japanese Tenpo Shiketsu), participant in castle games 1838-1861 from the time he reached 7 dan. Note that the first kanji in the family name is different from Sakaguchi Sentoku I (坂口仙得). Earlier name was Ogino Torajiro (荻野虎次郎).
Sakaguchi Shintaro was his son. Is not clear if he was the son of Yasui Senchi.