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Kenichiro Thomson is the English voice actor credited with the protagonist role of Musashi Miyamoto in Onimusha: Way of the Sword. His casting was publicly announced by Capcom's official Onimusha channels in February 2025, in the same wave of marketing that confirmed the game's protagonist and revealed Toshiro Mifune as the face model for the character. The announcement paired the two names explicitly, framing the face-and-voice split as a deliberate creative choice rather than a technical afterthought.

Overview

Thomson is a British-Japanese actor and voice artist based in London. He is listed as multi-lingual, with English, Spanish, and Japanese spoken fluently, along with working German, and his career to date has spanned television, film, stage, and voice work. Onimusha: Way of the Sword represents his first major credit as the English voice of a lead video-game protagonist, a role large enough that Capcom treated the casting itself as marketing material rather than as a line item buried in the end credits.

The Japanese-language performance of Musashi is handled by Yoshimasa Hosoya. The two voice tracks were announced together with the face-model credit, which means the public presentation of Musashi was never anchored to a single performer but to a trio: Mifune supplying the face, Hosoya the Japanese voice, and Thomson the English voice. That arrangement is unusual enough that it became part of how the character has been discussed across previews and trailer reactions since the initial gameplay reveal.

Role on Way of the Sword

Thomson's responsibility is the English-language dialogue and vocal performance for the protagonist across the entire game. That scope covers the cinematic story scenes, the barks and shouts that play during combat, any quiet in-world dialogue with allies, and the incidental vocalisation tied to traversing the city and wielding the Oni Gauntlet. Because Musashi is present in every story beat of the game and is the only playable character disclosed so far, Thomson's voice carries the full weight of the English performance.

The split between face and voice places a particular demand on the performance. The face model is locked to Mifune's likeness, a face that carries a dense set of viewer associations with classic samurai cinema, so the English voice has to land a Musashi that feels coherent with that face without becoming an impression of the actor behind it. Capcom's framing describes Thomson as talented in the initial announcement, which is the only descriptor the publisher has attached publicly, but the scale of the role is implicit in how the game is built: this is a single-protagonist action title, and the lead voice is carrying every scripted line the player will hear in English across a roughly twenty-hour campaign.

Casting Announcement

The casting was confirmed through the official Onimusha social channels on 12 February 2025, the same day the first gameplay trailer debuted during a State of Play broadcast. The voice credit and the face-model credit went out together in the hours immediately following the stream rather than as a separate later beat. The Capcom post named Thomson as the English voice of Musashi, named Mifune as the face model, and attached the the talented Kenichiro Thomson phrasing that has been reused in downstream coverage. The wording set the expectation that the voice cast was a deliberate curatorial choice by the team rather than a generic localisation pass added late in production.

Pairing the voice and face announcements in a single post was a notable choice. It meant that from the moment Musashi was introduced to the wider public as a named protagonist, audiences knew the character was a composite: an iconic face, a modern Japanese voice performance, and a separate English voice performance. That framing fed directly into later previews, where the visible-and-audible identity of Musashi was discussed as a deliberate construction rather than as one actor delivering the full package.

Career Background

Thomson's prior credits sit primarily in live-action British and international television. His recurring television role is as Martin in the political drama The Diplomat, which began airing in 2023, where he is credited across eleven episodes of the show. He also appears in Britannia, the historical drama first released in 2017, and in the independent 2025 feature Two Big Feet, directed by Noah Stratton-Twine, in which he plays the character Frank. The film received a UK release in March 2025.

Because his on-screen credits already span period drama and contemporary political drama in English, and because his Japanese fluency is public record, Thomson fits the brief Capcom was working to fill on Way of the Sword more neatly than a generic English-speaking voice actor would. The role demands an English-language performer who can carry a historical Japanese setting without the result sounding like an out-of-period dub, and his stage and television background supplies that voicing register without relying on affected delivery.

Voice Direction and Production Context

The game is built on the in-house RE Engine and is directed by Satoru Nihei with Akihito Kadowaki producing. That production context matters for the voice work because the development team has been explicit that the game pursues historical authenticity in its setting, costuming, and period language. Musashi's English performance sits inside that frame, meaning the brief is to deliver the lines clearly in English and to do so without undercutting the recreation of Edo-era Kyoto the rest of the presentation is building.

The combat system also shapes the scope of the voice performance. Way of the Sword leans on the Issen counter, posture management, and soul absorption through the Oni Gauntlet as its core loop, which means the English voice track has to cover a large volume of combat vocalisation alongside the cinematic dialogue. Grunts, breath, shouted commands, and the vocal beats tied to special attacks are all part of the role, and those combat-side lines typically outnumber the scripted cinematic dialogue in an action game of this length.

Cast Credits

Capcom has since published the full English voice cast on its official character page, covering the Oni Lady, Ono no Takamura, Izumo no Okuni, Sasaki Ganryu, Daidara, Dokyo, Shuten Doji, Rasho-gan, and the newly named Genma siblings Burai and Ifuu, plus the Key Character Man in White. Thomson's casting was the first of these to be confirmed through an official Capcom channel, announced alongside the face-model reveal months before the rest of the cast went public.