Etymology and distribution of 字井.

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

Oosaka-fu , Aichi-ken , Hyougo-ken .

① Mie-ken Matsusaka-shi Origin of Asada town. A place name with a record since the Kamakura period. Aichi-ken Nagoya-shi Honmaru Honmaru was in the Edo period in the Owarii clan in the Clan office. Tradition of the same samurai.

② Yamaguchi-ken Yamaguchi-shi Birth of Asada (Asahida). A place name with a record since the Warring States Period. Last name is recorded in the Muromachi period. Good neighbor . Ehime-ken There is distribution in Uwajima-shi River.

※ Nagano-ken Originated from Asada of Higashikuima-gun (old: Chikuma-gun). Period, location unknown.