|Nickname||Risachan (りさちゃん), Riichan (りーちゃん)|
|Birthdate||August 11, 1998|
|Current Age||23 Years Old|
|Agency||Yoyogi Animation Academy|
|Social Networks||Instagram / SHOWROOM / Twitter|
|Idol Career Info|
|Debuted||July 2016 / 4th Generation|
- Hakata kara Tonde kita to yo~
- I flew from Hakata~
- Oshimen: Nakai Rika, Tashima Meru
- Hobbies: Uploading videos to SNS, cosmetics tours, beauty, reading magazines, making sweets
- Special skills: Eating cute food, hula hoop
- Likes: Salad, strawberries
- She failed AKB48's Team 8 and NMB48's 5th generation auditions.
- She sang and danced for her audition AKB48's "Heart Gata Virus".
- She was a member of w-street Fukuoka before joining HKT48
- She participated in the auditions while still being under another agency, which was not allowed. This came out on July 21, 2016 and she was dismissed from HKT48 on the same day.
- She currently holds the shortest time as a HKT48 member. She was in HKT48 for 9 days.
- She has 4 brothers.
- About a year after being dismissed from HKT48, she became a member of Sashihara Rino-produced idol group, =LOVE.
- HKT48 Kenkyuusei → Graduation
Otoshima Risa after her graduation
Otoshima Risa before joining HKT48