Miho Moribayashi is a Japanese artist known primarily for her work as a singer-songwriter and musician, who has also contributed voice work to anime and other media. She is the founder and sole constant member of the musical project Hi-Posi, which began in 1988 and has been associated with the Shibuya-kei genre. In addition to her music career, she has been active as a voice actor, providing narration for television and radio commercials for various companies.

Her most prominent and well-documented voice acting role is as the main character in the long-running stop-motion clay animation series Jam the Housnail. She voices the protagonist, Jam, a young snail-like creature who carries his house on his back. The series aired on NHK Educational TV from 1996 to 2006. Her involvement with the series extended beyond voice acting; she also wrote and performed the show's ending theme song, Boku de Aritai, under her Hi-Posi project. The cast of Jam the Housnail featured a variety of musicians and performers, but no recurring collaborations with specific voice directors or studios outside of this project are widely recorded. While sources confirm her work as a voice actor with numerous credited roles, particularly for commercial work, detailed information about a broader anime voice acting career beyond Jam the Housnail is not available in the accessible records.