Oto Agumi is the pseudonym of a Japanese voice actress primarily known for her extensive work in adult visual novels and anime. She is the stage name of Mai Gotō, a voice actress affiliated with the talent agency Ken Production who uses this alias for roles in R-18 games and their animated adaptations. Her career in this field began in 2003, with her debut role being叶月真帆 (Hazuki Maho) in the game 天使のいない12月 (Tenshi no Inai 12 Gatsu).

Oto Agumi has built a prolific career, becoming a familiar voice in the visual novel community. She is often associated with specific game studios and franchises. A notable achievement early in her career occurred on July 28, 2006, when she set a record by having six different games featuring her voice work released on the same day.

Her filmography includes a vast number of game roles, with many becoming defining performances. Some of her most recognized and representative characters include 朝霧麻衣 (Asagiri Mai) from the 夜明け前より瑠璃色な (Yoake Mae yori Ruriiro na) series, 羽山ミズキ (Hayama Mizuki) from the ef - a fairy tale of the two. series, 朝倉音夢 (Asakura Nemu) from the D.C. ~Da Capo~ franchise, 千歳佐奈 (Chitose Sana) from 天神乱漫 (Tenjin Ranman), and 瓜生桜乃 (Uryū Sakuno) from ましろ色シンフォニー (Mashiroiro Symphony). She also frequently voiced the character 劉備 (Ryūbi / Touka) in the long-running 真・恋姫†無双 (Shin Koihime†Musō) series of games.

As requested, she is credited with the role of 四谷琴子 (Yotsuya Kotoko) in the OVA 15美少女漂流記 (15 Bishōjo Hyōryūki). Furthermore, she plays the role of 藤野紫苑 (Fujino Shion) in both Hatsuinu The Animation and Hatsuinu 2 The Animation - Strange Kind of Womans - again. While primarily known for games and adult OVAs, her mainstream voice acting as Mai Gotō includes roles in popular anime series such as May Chang in Fullmetal Alchemist: Brotherhood.

Beyond voice acting, she has also contributed to character song CDs, performing tracks for the characters she voices, such as the character CD for 透舞のん (Tōrimai Non) from the game いつか、届く、あの空に。 (Itsuka, Todoku, Ano Sora ni.).