Kokia (コキア, Kokia) is a Japanese singer-songwriter from Tokyo. She is known mostly for her performances in video game and anime soundtracks; having appeared in eight different game/anime soundtracks to date. Kokia is noted for her vocal range, and ability to hold long-tone opera notes, having done so for 29 seconds during a television appearance. She is most well-known in Hong Kong and Taiwan for her song Arigatou..., which achieved commercial success, and was covered by star Sammi Cheng. Her biggest hit in Japan is the single The Power of Smile / Remember the Kiss, which reached number 15 on Oricon charts.