Born in Tokyo. She made her AV debut in 2000. In the September 2001 issue of Best Video, she was chosen as the number one video idol by readers.
She wasn't very popular at first, but after she became popular she fell ill and took a break. She replied that she didn't want to appear in a radical indie cell video.
Works
Adult Videos
2000
Pure Land (September 21st, VIP)
Lingerie Paradise (October 26, VIP)
I can't wait until after school (November 23, Tri Heart)
Uniform Lovers 15 (December 28, Tri Heart)
2001
Reverse soap heaven (January 19, 2001, Alice JAPAN)
Violated like a beast (February 2001, 2, Space Planning)
www.rio.com (May 21, 2001, Shy Planning)
Raw Park Busty Secretary (June 30, 2001, Miss Christine)
Big Boobs Spiral Continuous Rotation Boobs (July 21st, h.m.p) Other Starring: Miyoshino, Megumi Iijima
Rio Sannomiya's Cosplasshion (July 27, Tri Heart)
Venus Re-mix Vol.6 (August 24, Alice Japan) and others Starring: Ryo Hitomi, Makoto Sakura, Riko Akina, Minori Aoi, Ryo Aihara
I can't stop wanting you (August 25, C2 Corporation)
Shy DX 2001 DVD Actress Edition (August 27, Shy Kikaku) and others Starring: Miyuki Horai, Asuka Anno, Aya Mizushima, Erika Hayashi, Marin Kobayakawa, Remi Hayama, Ami Ayukawa
Women can't stand it (September 22nd, C2 Corporation)
Uchu Kikaku DX 120 Minute Special 8 (October 27, Uchu Kikaku) and others Starring: Rina Okada, Aya Suzuki, Erika Hayashi, Izumi Morino, Haruki Mizuno, Yu Takizawa, Yuna Nakazato
Cosplay Goten The Best (November 21, Video Bank) and others Cast: Sena Wakana, Chiharu Moritaka, Kotomi Sakura, Misa Sawamura, etc.
Nymphomania The Kageki (November 27, SAMM)
The moment when the first love gets wet for the first time... (November 30th, Try Heart) Other appearances: Miyuki Horai, Haruki Mizuno, Yuna Miyazawa, Kaori Shimizu, and 9 others