TL;DR, M!LK member Sono Shunta has been cast as Kamen Rider Mugen, Shuma Kumon, in the Kamen Rider ZEZTZ and Super Space Sheriff Gavan Infinity W Hero Summer Movie 2026. The film opens in Japan on July 24 and a new trailer and visual show the character in action.
LK member Sono Shunta is playing Kamen Rider Mugen in the Kamen Rider ZEZTZ and Super Space Sheriff Gavan Infinity W Hero Summer Movie 2026, opening in Japan on July 24.
A new trailer and visual confirm the role and name the character as Shuma Kumon. D.
rollout, placing Sono Shunta Kamen Rider Mugen at the center of this summer’s crossover.
Sono Shunta joins Kamen Rider ZEZTZ and Gavan Infinity as Kamen Rider Mugen
Toei unveiled the role in a Kamen Rider Mugen announcement video and companion visual, confirming M!LK7s Sono Shunta as the newest Rider. The crossover pairs Kamen Rider ZEZTZ with Super Space Sheriff Gavan Infinity for a W Hero feature, and the materials emphasize a villain-forward setup while holding back specific story beats.
The film is titled Kamen Rider ZEZTZ and Super Space Sheriff Gavan Infinity W Hero Summer Movie 2026. Promotional copy highlights Sono Shunta Kamen Rider Mugen as the headline reveal, focusing on his transformation highlight without extended synopsis. Taken together, the trailer and visual signal how the production intends to balance both brands within a single summer showcase.
Toei circulated the footage via the movie7s official outlets, including the Toei Movie YouTube hub. The rollout mirrors industry timing seen in our recent cast announcement coverage, where studios front-load the suit reveal and lead actor to anchor seasonal marketing before deeper plot trailers arrive.
- Role confirmation: Shunta portrays Shuma Kumon, the civilian behind Kamen Rider Mugen.
- Family link: Kumon is a cousin of Kensei Odaka, known to ZEZTZ viewers as Nox.
- Transformation: The device shown in materials is the Daydream Capsem.
- Scope of reveal: The trailer and visual show the idol in action, but keep story specifics minimal.
- Crossover label: Official text frames the release as a W Hero movie uniting ZEZTZ and Gavan Infinity.
- Marketing focus: Casting and suit identity take precedence over plot exposition at this stage.
Who is Shuma Kumon, the Kamen Rider Mugen character?
a. Nox, embedding the antagonist within the series7s core cast web. That connection tightens narrative stakes without requiring a full origin dump.
Using a compact device called the Daydream Capsem, Kumon triggers his change into Kamen Rider Mugen.
Unlike C.O.D.E., which taps dreams, Kumon targets daydreams. His goal is to draw strength from wandering thoughts, then extend influence across waking and sleeping states. Within that framework, Shuma Kumon Kamen Rider positioning makes him a direct foil to ZEZTZ7s lucid-dream agent, challenging mission logic on both sides of the reality line.
The setup points to clashes defined by control of attention, not just brute force. Expect precision around rules and devices as Kamen Rider Mugen powers manifest and test C.O.D.E.7s methods. Comparable antagonist pivots show up in franchise new cast reports, where a rival mirrors a hero7s toolkit to pressure the premise.
- Identity: Shuma Kumon is the civilian persona behind Mugen.
- Relation: He is the cousin of Kensei Odaka, known to viewers as Nox.
- Method: The Daydream Capsem is the transformation device tied to his agenda.
- Ambition: Harness daydreams to impact both waking and sleeping worlds.
- Theme fit: Mirrors ZEZTZ7s lucid operations with a daylight twist that complicates missions.
- Threat model: His approach undermines C.O.D.E.7s dream-only lane, forcing countermeasures in both realms.
Trailer, release date and where to watch Kamen Rider ZEZTZ and Gavan Infinity
The latest trailer stitches together action glimpses of Mugen without heavy exposition, while a key visual locks in the crossover7s full title. Together they serve as a checkpoint reveal, focusing on the suit, actor, and branding over plot beats, which aligns with Toei7s early-cycle marketing rhythm.
Official channels confirm the Kamen Rider ZEZTZ movie July 24 Japan opening. Distribution outside Japan is not yet confirmed. For viewers asking where to watch Kamen Rider ZEZTZ weekly, Toei points to the TokuSHOUTsu global simulcast with English subtitles on Shout!
TV7s YouTube channel, which covers the series rather than this theatrical release.
- Japan theatrical: Opens July 24, with standard W Hero summer positioning.
- Series access: TokuSHOUTsu global simulcast provides English-subtitled episodes of ZEZTZ on YouTube.
- International film plans: No overseas theatrical or streaming details have been announced yet.
- Brand context: Super Space Sheriff Gavan Infinity PROJECT R.E.D. leads Toei7s new red-hero initiative in TV Asahi7s Super Hero Time block.
- Focus of trailer: Highlights Shuma Kumon7s transformation into Mugen and the two-hero crossover banner.
- Next updates: Expect confirmation of cinema formats and goods closer to release from Toei7s official outlets.
As Toei7s schedules firm up, overseas access typically clarifies nearer to opening. For context on how cast and rollout details expand pre-release, see our more cast details coverage of similar announcements.
Source: Crunchyroll