Katsuki Monma

Katsuki Monma’s Path Through Anime and Games

From Hokkaido’s northern landscape, Katsuki Monma has carved a career anchored in ensemble and supporting work across some of the most active corners of Japanese animation and gaming. Affiliated with Tokyo’s Inspion Agency, the seiyuu has accumulated credits ranging from brief scene-setting appearances to multi-episode recurring roles, establishing himself as a dependable performer within the industry’s supporting tier.

Firefighter Daigo: Rescuer in Orange and Extended Work

One of Monma’s most sustained credits came through Firefighter Daigo: Rescuer in Orange, where he appeared across more than a dozen episodes in a variety of roles – from emergency personnel and team members to a doctor and ginger valley’s captain voice. That kind of range within a single production speaks to his adaptability in the recording booth. Beyond Daigo, his credits span across titles including Engage Kiss, Spy Classroom, Giant Beasts of Ars, Rising Impact, Tomo-chan Is a Girl!, The Vexations of a Shut-In Vampire Princess, Tales of Wedding Rings, Uma Musume Pretty Derby Season 3, and the 2026 series Tune In to the Midnight Heart.

Lonely Castle in the Mirror and Film Work

On the film side, Monma voiced Masamune’s Father in Lonely Castle in the Mirror, the 2022 A-1 Pictures theatrical release based on Mizuki Tsujimura’s award-winning novel. The film brought together a substantial cast for an emotionally grounded drama about isolated teenagers, and Monma’s contribution – though supporting – sits within one of the more critically noted anime films of that period.

Rick and Morty: The Anime and Marvel Rivals

Two high-profile international productions have placed Monma alongside global IP. In Rick and Morty: The Anime, Adult Swim and Telecom Animation Film’s Japan-produced spin-off, he voiced a rebel technician and vice commander across two episodes. Then came Marvel Rivals – NetEase’s hero shooter launched in 2024 – where he took on Thor Odinson in the Japanese voice track, confirmed through the Inspion Agency’s own work listings. The role put him in front of a far broader audience than ensemble anime credits typically reach.