Etymology and distribution of 月内.

Tsukiuchi 【月内】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Hokkaidou , Ishikawa-ken Nanao-shi .

① Ishikawa-ken Nanao-shi Originated from the vicinity of Akasaki River (Old: Kishikawa) flowing through Ota-machi. Tradition on the same place.

② Yamaguchi-ken 's alias of the Iwakuni river has Nishikigawa.

③ Korea type . Kyouto-fu Mukou-shi (formerly Ochi- gun, Asuka-gun) has a record of naturalization on March 31, 1956. The real name is Park. 朴 Boku reference.