(石井竜也, Ishii Tatsuya) (born September 22, 1959) is a Japanese singer, songwriter, artist, and industrial designer from Ibaraki Prefecture, Japan.

In 1985 he debuted as vocalist in the band Kome Kome CLUB (米米CLUB, Kome Kome CLUB). In 1992, their single Kimi ga Iru Dake de (君がいるだけで, Kimi ga Iru Dake de) won the Japanese record first prize. After Kome Kome Club's breakup in 1997, he began a solo career. His first solo single was released in 1997. To date, he has released 20 singles and 12 albums in his solo career. He has written and produced numerous songs for special events in Japan.
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