Etymology and distribution of 足守.

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

Kagoshima-ken Isa-shi . There is a designation of Aso in the caldera area of Mt. Aso in Kumamoto-ken . In 1281 (Hiroshi 4 years) tell Shimazu that he called it. 島津 Shimadzu reference.