- 2005.10.30 - Joined AKB48 as Team A member
- 2008.11.23 - Graduated from AKB48's Team A (Announcement: October 5, 2008 | Graduation Stage: October 11, 2008)
- Sakura no Hanabiratachi
- Skirt, Hirari
- Seifuku ga Jama wo Suru
- Keibetsu Shiteita Aijou
- Boku no Taiyou
- Baby! Baby! Baby!
- Dear my teacher (Sakura no Hanabiratachi)
- Aozora no Soba ni Ite (Skirt, Hirari)
- Dakedo... (Aitakatta)
- Virgin love (Seifuku ga Jama wo Suru)
- Namida Uri no Shoujo (Keibetsu Shiteita Aijou)
- Only Today (BINGO!)
- Mirai no Kajitsu (Boku no Taiyou)
Chocolove from AKB48
- Ashita wa Ashita no Kimi ga Umareru
- Mail no Namida
- A4 (Tadaima Renaichuu)
- Himawarigumi 1 (Boku no Taiyou)
- Boku to Juliet to Jet Coaster (1st Unit)
- Kinjirareta Futari
AKB48 Haru no Chotto dake Zenkoku Tour ~Madamada Daze AKB48!~
- Chocolate (Rina solo) (Dessert)
- Kare no Kitchen (Rina solo) (Dessert)
- Waves (Rina solo) (Dessert)
- [2009.04.28] Nakanishi Rina 1st Photobook AKB48 Graduation
- Audition Song: Anata ni Aete Yokatta (Koizumi Kyoko)
- Star sign: Cancer
- Hobbies: Cooking
- Charm point: Dimples
- Favorite artist: Matsuura Aya
- Favorite character: Sanrio's "Charmy Kitty"
- Favorite colors: Pink, black
- Favorite flower: Tulip
- Favorite movie: Peter Pan
- Good friends with: Ohe Tomomi
- Former member of Chocolove from AKB48
- Collects earrings and perfume
- If she were to become another member, she would be either Ohe Tomomi or Minegishi Minami
- Her recommended AKB48 songs are Classmate and Sakura no Hanabiratachi
- If she were to compare herself to a color, it would be pink. However, Hoshino Michiru said that she would be white.
- The most important things in the world to her are family and friends.
- The first thing she wanted to do when she became an adult was to drink alcohol with Oshima Mai.
- Has a weakness for rice
- The person she respects the most is her mother, because she is responsible and good at cooking.
- Likes singing songs by Matsuura Aya during karaoke
- Loves Starbucks, and has a poster from Starbucks in her room
- As a young girl, her dream was to perform onstage at Canal City (which she has achieved).
- Usually wears a T-shirt and long skirt
- Says the sources of her energy are chocolate and vitamin supplements
- Could be consistently seen at the forefront in singles and concert performances, though she tended to take more of a secondary role to the lead singers Maeda Atsuko and Takahashi Minami
- Some years after graduating, she pursued a career as an AV actress under the name "Yamaguchi Riko." She retired from the AV industry in April 2012.
- She is currently married and has a daughter, Airi.