Ryūma Tanizawa is a Japanese actor and director who made his anime voice acting debut in 2026. Born on October 9, 1988, in Niigata Prefecture, Tanizawa stands 181 cm tall and is affiliated with the talent agency Gokko Club. He began his entertainment career in 2012, primarily working in stage productions, and is a founding member of the short drama production group Gokko Club, which was established in 2021.

Tanizawa's first and most notable voice role to date is Demon King Zangi, also referred to as Demon King of Violence Zangi, in the television anime series Komekami! Girls, which began airing in April 2026. In the series, Demon King Zangi is characterized as the ruler of the demon race who opposes the Rice Goddess Queen. Official announcements confirm that this role marks Tanizawa's long-awaited debut as a voice actor. Prior to this, his career had been focused on live-action performances, including appearances in television dramas such as the NHK taiga drama Seitan o Tsukue, the film Helldogs, and various stage productions. He has also worked as a director on several short drama projects.

As of early 2026, publicly available information on Tanizawa as an anime voice actor is limited to this single debut role. There is no confirmed list of major recurring voice acting collaborations with specific directors, studios, or fellow cast members beyond the production of Komekami! Girls. No notable awards or nominations for his voice acting work have been recorded, as his anime career is in its initial stages. Records of his personal life remain private and unverified.