From October 5-9, she participated in the stage play "Kenroh -KENROH-".
On April 30, 2008, Muto Mika graduated from Ongaku Gatas and Hello! Project to lead a normal life.
In May 2010, it was announced that she would return to the entertainment industry. She had her first live on June 10, 2010 titled "Muto no Hi" (Muto’s Day) and she also had her first solo event on June 19th of the same year.
On July 8, 2013 Muto announced via Twitter that she would be going on hiatus from the entertainment industry. She has since retired without resuming activities.
- Name: Muto Mika (武藤水華)
- Stage Name: Muto Mika (むとう水華)
- Nickname: Mucchi (ムッチぃ)
- Birthdate: January 31, 1992
- Birthplace: Saitama, Japan
- Blood Type: A
- Height: 157 cm (5 ft 1.8 in)?
- Western Zodiac: Aquarius
- Eastern Zodiac: Goat
- Hello! Project Status:
- UP-FRONT GROUP Status:
- 2004-06-20: Joined UP-FRONT AGENCY
- 2008-04-30: Left
- Former Ongaku Gatas Color: Light Blue
- Hello! Project groups:
- Concert Units:
- Main article: Muto Mika/Discography
- [2010.11.02] Merry Go Round (メリーゴーランド)
-  Kenroh -KENROH- (剣狼-KENROH-)
- Muto's former Gatas Brilhantes H.P. uniform number was #25 (April 2007-April 2008) and was previously #17 (November 2004-July 2006) and #15 while in Little Gatas (August 2006-March 2007).
- Muto Mika was the only member Gatas Brilhantes H.P. to also be a member of all of its sub-units: Little Gatas, Mix Gatas, and Ongaku Gatas.
- She was known for using gyaru-moji in her blog.