Etymology and distribution of 岩水.

Iwamizu 【岩水】^{レベル4
About 800}  The Japanese surnames etymology dictionary.

Okinawa-ken , Kagawa-ken , Oosaka-fu .

① Topography . From the original inside. Kagoshima-ken Minamikyuushuu-shi From Takada in Kawabe-cho from the Uchihara Hanabi of the gate division system which was in the Edo period.

② Wakayama-ken Hidaka-gun Hidaka-chou Originated from the vicinity of Hagiwara (formerly Uchihara). A place name with a record since the Nara period. Wakayama-ken Hidaka-gun Hidaka-chou It was in Edo era in Haruya.

There is a record of Nao Urahara's family name in 764 (Tenpyo Treasure 8 years).

③ Ibaraki-ken Mito-shi The origin of Uchihara-cho. A place name with a record since the Edo period. There are also names of places from Mr. Uchihara's name.