Akiko Yoshida (吉田亜紀子, Yoshida Akiko; born July 22, 1976) is a Japanese singer and songwriter performing under the stage name Kokia (styled KOKIA). Her most well known songs are "Arigatō..." (ありがとう..., Thank You) (which reached number 2 in Hong Kong when it was covered by Sammi Cheng) and "The Power of Smile" (which topped at No. 8 in the singles chart). She is also recognized for her numerous contributions to anime/game soundtracks, the most notable being "Ai no Melody/Chōwa Oto (With Reflection)" for the film Origin: Spirits of the Past, "Follow the Nightingale" for the game Tales of Innocence, "Tatta Hitotsu no Omoi" for the anime Gunslinger Girl: Il Teatrino, "Dance of the Spirits" for the anime “The Ancient Magus' Bride” and "For Little Tail" for the game Tail Concerto.

Kokia often performs in Europe, basing her activities in Paris and releasing music through Wasabi Records, a subsidiary of Kazé.

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