土屋アンナ (Anna Tsuchiya), born March 11, 1984, is a Japanese singer, songwriter, model, and actress. She was born in Tokyo to an American father of Polish-Irish descent and Japanese mother. In late 2002, Tsuchiya joined with ex-Oblivion Dust member Kaz Iwaike to form Spin Aqua. They released three singles, one album, and one video collection before Anna announced in November 2003 that she was pregnant (at age 19) by husband Joshua (another half-Japanese model) and was leaving the band. In February 2004, Anna gave birth to a baby boy.

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