Saitou Miuna was a member of the Hello! Project group Country Musume. She was discovered during the Morning Musume 6th Generation Auditions. Miuna was also a member of Hello! Project's futsal team, Gatas Brilhantes H.P.
She graduated Hello! Project on the 28th of January 2007 at the Hello! Project 2007 Winter ~Shuuketsu! 10th Anniversary~ concert, alongside fellow Country Musume member Kimura Asami. In her graduation announcement comments she says that she looks forward to following new dreams, but will always treasure her time in Country Musume and the love the fans gave them.
In April of 2011 she began working under her full name as a columnist for the website All About, where her focus is on love and relationships. Later in 2013 she began writing a column for MSN Lifestyle that focused on relationships on the work-floor.
- Stage Name: Miuna (みうな)
- Birth Name: Saito Miuna (斉藤美海)
- Birthday: February 12, 1987
- Birthplace: Kikugawa, Shizuoka, Japan
- Blood type: O
- Hobbies: Cleaning the house, going for walks
- Special skills: Memory
- Favorite colors: Pink, black
- Favorite flowers: Roses
- Favorite season: Summer
- Favorite sayings: "Whatever you experience, it's not for naught. No matter what you may be feeling, tomorrow will always come."
- Favorite food: Peperencino, creme brulee
- Disliked food: Carrot, minty gum
- Favorite song: Uwaki na Honey Pie "This song changed my life..."
- Hello! Project groups:
- Shuffle units:
- 2004: H.P. All Stars