His father, Tosaku, was adopted by Tokai ARISAWA, who was a physician in Fukumitsu-mura at the time, and Tosaku had taken over as a physician in Fukumitsubashi Kitazume.
父の東作は当時福光村で医者をしていた有沢東海の養子となり､福光橋北詰で医業を嗣いでいた。