The place name of 'Amida' is mentioned in "Manyo Shu" (the oldest anthology of tanka), and Adahime-Jinja Shrine, which is one of Shikinai-sha (shrines listed in "Engishiki Jinmyocho" [a shrine list written in Engishiki, an ancient book for codes and procedures on national rites and prayers]), lies in this area; these facts suggest that this area was civilized early.
「阿陀」の地名は『万葉集』にも見え、式内社（『延喜式神名帳』に記載された神社）の阿陀比売神社（あだひめじんじゃ）があるなど早くから開けた地域であったと思われる。