Etymology and distribution of 上後.

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

Miyagi-ken , Hokkaidou . A variant of 内崎 . Miyagi-ken Sendai-shi Aoba-ku Kawauchi was in the Edo era in the Sendai Samurai of the Clan office. 内崎 Uchisaki reference.