Etymology and distribution of 小保川.

Obokawa 【小保川】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Hokkaidou Tokachishi-chou Taiki-chou . Thing . A variant of 加藤木 . Ibaraki-ken Mito-shi Sannomaru was in the Edo period in the Mito samurai of the Clan office. 加藤木 Katougi reference.