Etymology and distribution of 射殘.

Inokoshi 【射殘】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Kouchi-ken , Oosaka-fu , Toukyou-to . Heterogeneity of 岩川 . In Kouchi-ken Shimanto-shi tells that Kagoshima-ken Eastern (old: Oosakuni) comes out and changed from Iwakawa surname. Estimated in the Edo period. 岩川 Iwakawa reference.