Asou 【阿曽宇】1 The Japanese surnames etymology dictionary.
Fukuoka-ken , Kyouto-fu , Toukyou-to . Originated Shimane-ken Goutsu-shi rakichi- cho (formerly Abuto (Ato)). The name of a place with a record in the notation of "Ao" during the Heian period. Tradition in Shimane-ken western part (formerly Iwami-kuni).
* There was a case in which 68 years (Emperor Tenmu 13 years) gave a family name of Abuto (Ato Inui). Location unknown.