斎藤美海 (Saito Miuna), also simply known as Miuna (みうな), is a Japanese model, actress, columnist, and former pop singer. She was a member of the Hello! Project group Country Musume from 2003 to 2007 and the Hello! Project futsal team Gatas Brilhantes H.P. from September 2003 to July 2005 as number 4. She is currently signed under the agency Prestige and works as a love columnist for 4MEEE.