**Mami Koyama** (小山 茉美, Koyama Mami) is a renowned Japanese voice actress (seiyuu), famous for her versatile career spanning decades. Her distinctive voice has allowed her to play a wide range of characters, often iconic in the world of animation and related films.

Among her most famous roles are the hyperactive and naive Arale Norimaki in *Dr. Slump & Arale-chan* (and subsequent films), the charming and evil Doronjo in *Yatterman*, and the pragmatic Lunch in *Dragon Ball*. She has demonstrated her ability to bring complex female characters to life, whether comical and lively or authoritative or even menacing, such as the fearsome Balalaika in *Black Lagoon*. Her influence in the world of Japanese animation is significant, making her one of the most recognizable and respected voices.