Rie Iwatsubo is a former Japanese voice actor and singer from Tokyo, born on January 28, 1963. She began her career in the early 1990s and was active in the anime industry until around 2004, when she ceased all professional activity without an official announcement, leading to the widespread understanding that she has retired. During her career, she was affiliated with the talent management firm Production Baobab.

Iwatsubo's debut role was as Haruka Amano in the 1991 series The Brave Fighter of Sun Fighbird. That same year, she began voicing two of her most recognized characters in the series Matchless Raijin-Oh: the main character Asuka Tsukishiro and the role of Yoko Kuriki. She continued to take on a wide variety of roles throughout the 1990s, demonstrating her range across different genres and age groups.

She frequently appeared in works directed by Akitarō Daichi, contributing to several of his notable productions. These include the role of Kotetsu Oosawagi in Urayasu Tekkin Kazoku, the dual role of Risky and Safety in Omishi Magical Theater Risky Safety, and a role in the series Jubei-Chan The Ninja Girl - Secret of the Lovely Eyepatch. She also had a recurring role as Denbo in the long-running children's anime Prince Mackaroo.

Her voice can also be heard in a range of other anime from the era. She played Kid in both Chō Hatsumei Boy Kanipan and Hatsumei Boy Kanipan, Honoka Kawai in Magical Project S, and Craria and Shizuku Kobayakawa in Tournament of the Gods. Additional roles include Saki Midorosawa in Parade Parade, Aki in Stainless Night, Moyu Miyama in Venus 5, Ilya in Matō Kitan Zankan, and Flair in Into the Erogenous Zone: Lyon Flare. She also provided voices for Yûta Kobayashi in Megaman: Upon a Star, Kozaru in Jubei-Chan The Ninja Girl, and Hideo in Tobe! Pegasus: Kokoro ni Goal ni Shoot.

Beyond voice acting, Iwatsubo was also a singer and performed several songs for anime series, such as for the show Idol Project. Following her departure from the industry in 2004, many of her ongoing roles, including Denbo in Prince Mackaroo and Asuka Tsukishiro in the Super Robot Wars video game series, were taken over by other voice actors. Her career, while spanning little more than a decade, left a significant mark on the anime of the 1990s through a wide array of memorable and beloved characters.