Etymology and distribution of 入西原.

Irinishihara 【入西原】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Tokushima-ken Itano-gun Aizumi-chou . There was a name of Mr. Nyiko Nishikawa at the warrior of the Sengoku period · Azuchi Momoyama period. 尼子 Amako reference.