Etymology and distribution of 入學.

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

Kagoshima-ken , Ishikawa-ken , Hiroshima-ken . Distribution including Yasujima.

① Topography . "Island" is added to the guardian who is the surname of Amagi archipelago of Kagoshima-ken . Estimated at the time of returning to Japan in 1953. 保 Tamotsu reference.

② 安島 surname. 安島 Ajima reference.