Etymology and distribution of 城墻.

Shirogaki 【城墻】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Fukui-ken , Ibaraki-ken , Hiroshima-ken . Terrain . From the land with the fields. Hiroshima-ken was in the Warring States Period. In Niigata - ken tell Nitta 's descendant. There is "rice field" in Nitta. 新田 Nitta reference.