COMA-CHI (コマチ), born May 11, 1984, is a MC and R&B/pop singer from Tokyo, Japan who debuted in 2006 with the release of her indies album, "DAY BEFORE BLUE".

In 2011, COMA-CHI left Knife Edge, sub-label of Pony Canyon. She explained that she no longer wants to make music for the sake of making money and earning a living. Her choice not to sign with another major label was a result of wanting to express herself as much as she possibly can without causing trouble for her company, or anyone else involved in the creation of her music.

On November 23rd, 2011, she returned under an indies label and released her first mini-album Taiyou wo Yobu Shounen.

In December 2012, she released her fifth studio album 'GOLDEN SOURCE', This is her first album under VYBE MUSIC, a sub-label of ULTRA VYBE records.

In 2013 she got married and later announced her pregnancy.

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