|Born||December 17, 1989|
She auditioned for Morning Musume's 7th generation in 2005, but failed. Afterwards, Iwashima joined Hello! Pro Kansai and became an official member of SI☆NA in 2008. SI☆NA disbanded in May 2011, After the disbandment of SI☆NA, Iwashima released a solo single.
She announced her retirement from the music industry on February 26, 2013.
- Name: Iwashima Manami (岩嶋雅奈未)
- Nickname: manami
- Birthdate: December 17, 1989
- Birth Place: Osaka, Japan
- Blood Type: B
- Western Zodiac: Sagittarius
- Eastern Zodiac: Snake
- Hobby: Reading mobile phone novels
- Specialty: Taiko no Tatsujin
- Favorite Food: Mozuku, celery, manju
- Likes: Kotatsu
- Looks Up To: Goto Maki
- Hello! Project Groups:
- [2012.12.17] Yakusoku~the other shoelace / Shining Night
- She auditioned for Morning Musume 2005 audition, but lost to Kusumi Koharu.
- Her motto is "practice makes perfect".
- She thinks her charm point is the mole near her mouth.
- She was in the Swimming Club in Junior High
- She is married and has a daughter named Miu.