Effective period / Period of releases: 2009 - 2021

Members: Elementas, Shihori, Yassie, あき, 越田Rute隆人

Consisting of Yassie and Elementas, they are the Japanese doujin circle "A-One". Elementas and Yassie are arrangers. Yassie also writes lyrics. あき (Aki) , 越田Rute隆人 (Koshida Rute Takahito) left A-One in May 2018.

Not to be used as a main release artist unless the release is presented under A-One as a band. If in doubt, don't use this artist. The only exception is if they explicitely say they collaborated (ex.: A-One x Axel.K).