AZU (born 8 December 1981) is a Japanese R&B singer. She is well-known for her collaborations with rapper SEAMO, such as her first major release, the leading track from SEAMO's second album Live Goes On, "Kokoro no Koe." Since the age of 16, AZU performed live at clubs; her shows were mostly held around the Kansai and Toukai areas. She made her first appearance when she was selected by SEAMO to be featured on his second album, Live Goes On. The song, "Kokoro no Koe" ended up being used as the radio single to promote the album.