Momosuke Mizutani is a Japanese actor born on January 24, 1986, in Kanagawa Prefecture, Japan. His career began in 2002 when he was selected through the 15th Junon Super Boy Contest. He is affiliated with the talent agency Office Junior.

Mizutani is recognized for his work in live-action television dramas and films. His notable television credits include roles in popular series such as Gokusen 2 (as Momosuke Omori), Dragon Zakura (as Jiro Okuno), and the drama adaptation of 1 Litre of Tears (as Kohei Onda). He also appeared in the 2009 Kamen Rider Decade series as Shinji Tatsumi, a version of Kamen Rider Ryuki.

While Mizutani is not primarily known as a voice actor, his most relevant credit to that field is his role in the live-action film adaptations of the manga and anime series NANA. He portrayed the character Naoki Fujieda in both the 2005 film NANA and its 2006 sequel, NANA 2.

In addition to his work on screen, Mizutani has been active in stage productions as a member of the theater company Funai-gumi, performing under the name momo. Following his on-screen acting career, he has reportedly worked as an acting trainer, director, and screenplay writer.