Momoko Taneichi is a Japanese voice actress born on April 11th in Aomori Prefecture, Japan. She is a graduate of Aomori Prefectural Hachinohe High School and Tsuru University, where she studied English Literature. Following her university education, she pursued voice acting training at the Aksent affiliated training school, graduating as part of its 12th class.

Taneichi's career includes a range of roles in anime, video games, and foreign language dubbing. She is associated with the talent agency Aksent. One of her recognized roles is providing the voice for the character Santa in the 2018 anime series Megalobox and its 2021 sequel, Megalobox 2: Nomad. In the sequel, she voiced the character during flashback sequences.

Her other notable anime credits include Gwess in JoJo's Bizarre Adventure: Stone Ocean, Linda in More Than a Married Couple, But Not Lovers, and roles in series such as Welcome to the Ballroom, Basilisk: The Ouka Ninja Scrolls, and the 2022 adaptation of Urusei Yatsura. Her filmography also features work in web anime like Lupin Zero and original video animations (OVA) such as Baja no Studio.

Beyond anime, Taneichi is active in voice-over work for foreign films and series, known as fukikae. Her dubbing credits include the role of Princess Bean in the animated series Disenchantment, Yi in Abominable, Vaggie in Hazbin Hotel, and voice roles for live-action films such as Joker and Top Gun: Maverick. She is also slated to voice the character Aida in the 2025 video game Monster Hunter: Wilds.

Taneichi possesses skills in the Hachinohe and Nanbu dialects from her home region. Her personal interests include watching foreign dramas and cooking, and she is skilled at ice skating. She has a twin sister, Keiko Taneichi, who is a former announcer.