Who Is Musashi? The Onimusha Story Recap You Need Before September 4

Onimusha: Way of the Sword doesn’t ask you to have played a single one of Capcom’s PS2-era originals — the story is confirmed standalone [3]. But the series carries 25 years of recurring ideas into it: a cursed gauntlet, demons called Genma, a warlord who won’t stay dead. Knowing where those ideas came from turns Way of the Sword from “another samurai action game” into the payoff of a story Capcom has been telling since 2001.

It’s also arriving in a stacked month for narrative-driven swordplay — Phantom Blade Zero launches the same September, and both make our ranking of the best action RPGs of 2026. This primer covers two things at once: who Miyamoto Musashi actually was as a historical swordsman versus the character Capcom built around him, and what happened across Onimusha, Onimusha 2: Samurai’s Destiny, and Onimusha 3: Demon Siege — the trilogy that established every piece of lore Way of the Sword inherits.

The Real Miyamoto Musashi vs. Way of the Sword’s Musashi

Miyamoto Musashi was a real Japanese swordsman, born around 1583 (some sources give 1582, and Japan’s era-calendar conversion makes an exact year genuinely disputed) [9][10], who went undefeated across more than 60 recorded duels [9][10]. His most famous fight, against Sasaki Kojiro on Ganryu Island in 1612, has a detail that’s actually contested: the popular version has Musashi arriving late on purpose to rattle Kojiro, but at least one historian treats that as a later embellishment rather than fact [9]. What both accounts agree on is that Musashi won using a boat oar carved into an oversized wooden sword against Kojiro’s famously long blade [9][10]. Late in life, Musashi withdrew to a cave and spent roughly eighteen months writing the Gorin no Sho — the Book of Five Rings — finishing it about a week before he died in 1645 [9].

Way of the Sword doesn’t use any of that plot. Capcom’s version is set in Musashi’s 20s, years before the historical duels above and before he developed the two-sword Niten Ichi-ryu style he’s actually famous for — which is why the game is single-blade combat rather than dual-wielding [4]. Capcom licensed actor Toshiro Mifune’s likeness for Musashi’s face after a two-year negotiation with Mifune Productions [3][4], and animation lead Hiroshi Yugen has said the team pulled Musashi’s resourceful, use-anything fighting style — flipping tables for cover, grabbing torches mid-fight — directly from documented accounts of how the real Musashi fought [4]. The personality is adjusted too: game-Musashi chases duels for personal satisfaction rather than the fame and reputation that drove the historical figure [4].

What the Genma and the Oni Actually Are

Genma are the Onimusha series’ recurring demons, and in every game so far they follow the same pattern: they don’t create chaos randomly, they possess and resurrect. In the original trilogy, they raise the historical warlord Nobunaga Oda from the dead to lead their armies — twice, in two separate games [6][7]. In Way of the Sword, they’re described as creatures that normally stay in the underworld, pulled into Kyoto by a corrupting force called Malice that’s dragging the city itself out of the world of the living [1][3].

The Oni are the demons’ opposite number — an older, separate race the games treat as humanity’s actual protectors. Every mainline Onimusha protagonist gains their fighting power the same way: an Oni artifact binds to them and lets them absorb Genma souls on kill, converting death into strength. Way of the Sword’s version is the Oni Gauntlet, which sorts absorbed souls into three types — yellow for health, red for permanent upgrades, and blue to unlock Oni Armaments as alternate weapons — and also grants “Oni Vision” to spot enemies through the environment [3]. The gauntlet talks, too: its voice belongs to Shizuka, a woman whose spirit is trapped inside it after “something happens” to her. Lead writer Hiroshi Yamashita has confirmed she has her own goal — finding a way back into a physical body — and isn’t just a narration device, even though that’s functionally why the team wrote her in [5].

Onimusha (2001): Samanosuke, Princess Yuki, and the God Fortinbras

The trilogy opens during the Sengoku period. Samurai Samanosuke Akechi — modeled on and voiced by Takeshi Kaneshiro — gets a letter from his cousin, Princess Yuki, saying her servants are vanishing [6]. He arrives to find Genma responsible, teams up with the kunoichi Kaede, and discovers the demons have already resurrected the warlord Nobunaga Oda to serve them [6]. The Oni clan hands Samanosuke their power to fight back; by the end he’s rescued Yuki and an orphan named Yumemaru from being sacrificed, and killed the Genma’s actual god, Fortinbras [6]. Released in January 2001, it became the first PlayStation 2 game to sell a million copies and went on to move over 2 million worldwide [6] — the commercial success that got a sequel greenlit within the year.

Onimusha 2: Samurai’s Destiny — Jubei’s Revenge

Samurai’s Destiny swaps protagonists entirely. Jubei Yagyu returns home to find his clan’s village destroyed by Nobunaga’s forces — the same warlord from the first game, resurrected again [7]. An Oni woman named Takajo reveals Jubei has demon blood of his own and sends him after five sacred orbs said to be able to stop the Genma for good [7]. Along the way he meets Oyu, who turns out to actually be Oichi — Nobunaga’s own sister, fighting against her brother from the inside [7]. Jubei eventually kills Nobunaga at Gifu Castle, though the warlord threatens to come back a third time before he dies [7] — which, as the next game proves, wasn’t an empty threat.

Onimusha 3: Demon Siege — Two Eras, One War

Demon Siege brings Samanosuke back and does something the first two games never attempted: it splits the story across two time periods running in parallel. Samanosuke fights Nobunaga a second time at the real 1582 Honno-ji Temple incident, gets pulled through a portal mid-battle, and lands in Paris in 2004 [8]. There he swaps places with a French police officer, Jacques Blanc — played by and modeled on Jean Reno — while Jacques is thrown back into Samanosuke’s feudal Japan [8]. Both men have to survive in a country and century that isn’t theirs, aided by Jacques’ partner Michelle and his son Henri in Paris, while a Genma scientist named Guildenstern — the one who actually built the time-travel technology — becomes the real villain pulling the strings across both eras [8]. It’s the only game in the trilogy to leave Japan entirely, and it’s a large part of why the series has always treated “the Genma versus history itself” as bigger than one warlord.

Onimusha 1-3 at a Glance

Having replayed all three PS2 originals ahead of the September 4 launch, the pattern that’s easy to miss on a first playthrough of any single entry is how consistently the “villain” is never actually the human warlord — Nobunaga is a puppet in every one of his three appearances, and the Genma behind him are what the series has always really been about [6][7][8].

Do You Need to Play the Originals Before Way of the Sword?

No — and this isn’t a guess. Way of the Sword’s story is confirmed standalone, with no direct plot connection to the original trilogy or to the Netflix anime adaptation [3]. Musashi never meets Samanosuke or Jubei; Nobunaga isn’t confirmed as a character at all. What carries over is the mythology, not the cast: the Genma-versus-Oni conflict, the soul-absorbing gauntlet mechanic, and Japan as the series’ home turf all repeat, just worn by new characters. That story-can-stand-alone approach isn’t unique to Onimusha, either — our Nine Sols guide covers another demon-infused swordplay game built the same way, no prior-series homework required.

Way of the Sword does add its own new cast, and two of them follow the same real-history-remixed approach as Musashi himself. Izumo no Okuni is built on the real Izumo no Okuni, the shrine maiden turned performer credited with originating Kabuki on Kyoto’s Kamo riverbed around 1603 [11] — in-game previews describe her as a young dancer who’s left the stage to hunt the Genma herself. Ono no Takamura is drawn from the real Heian-era poet and calligrapher (802-853) who was, according to centuries of folklore rather than his actual biography, said to descend into hell every night [12] — which makes him a fitting real-world basis for a character previews describe as Way of the Sword’s third confirmed Oni Gauntlet bearer, alongside Musashi. Producer Akihito Kadowaki has said Capcom had historical experts review the story specifically so these real-figure cameos wouldn’t distort actual history [1] — the same care the developers put into keeping Musashi’s fictional arc separate from his real biography.

FAQ

Is Way of the Sword a reboot of the Onimusha series?

Not exactly — it’s closer to a spin-off than a reboot. A true reboot would retell the original story with new characters; Way of the Sword keeps the Genma/Oni mythology and the soul-gauntlet mechanic intact but tells an entirely new, unconnected story rather than reimagining Samanosuke’s or Jubei’s plot [3]. That distinction matters if you’re expecting closure on the original trilogy’s cliffhangers — Nobunaga’s repeated resurrection threats, for instance — because you won’t get it here.

Why did Capcom use a real historical figure instead of a new fictional samurai?

Because the connection wasn’t forced. Musashi’s real, documented life path took him through Kyoto as a swordsman making a name for himself, which is exactly the setup the story needed [1]. Building an original character would have meant inventing that same justification from nothing; using Musashi let the team lean on real texture — his fighting style, his ambition, even Mifune’s face — instead.

Does the Oni Gauntlet in Way of the Sword work like the artifacts in the original trilogy?

The core loop is identical — absorb Genma souls, convert them into power — but Way of the Sword’s version is more granular than anything in games 1-3: a three-tier soul system (health, upgrades, weapons) instead of a single generic power meter [3]. It’s an evolution of the mechanic, not a reinvention of it.

Before September 4

You can walk into Way of the Sword cold and understand everything it needs you to — and our full guide to everything confirmed about the game covers combat, editions, and the September 4 launch itself. But now you also know that Nobunaga has already come back from the dead twice, that “Genma” has meant the same demons since 2001, and that Capcom borrowing a real swordsman’s name is exactly the kind of move this series has always made — Way of the Sword just does it with more historical rigor than any entry before it [1][4].

Verified against official Capcom and Xbox Wire sources as of August 22, 2026, roughly two weeks before the September 4 launch — Capcom could still reveal further story beats before release.

Sources

1. [1] Onimusha: Way of the Sword’s Developers Talk Miyamoto Musashi, a Haunted Kyoto, and Modernizing Combat — Xbox Wire
2. [2] Onimusha: Way of the Sword Release Date Moved Up to September 4! — Capcom (official press release)
3. [3] Onimusha: Way of the Sword — Wikipedia
4. [4] How Capcom Created Its Own Version of Legendary Samurai Miyamoto Musashi — Game Informer
5. [5] What We Learned About Shizuka, The Mysterious Woman Living In Musashi’s Gauntlet — Game Informer
6. [6] Onimusha: Warlords — Wikipedia
7. [7] Onimusha 2: Samurai’s Destiny — Wikipedia
8. [8] Onimusha 3: Demon Siege — Wikipedia
9. [9] Master Swordsman Miyamoto Musashi: The Man Behind The Book of Five Rings — Nippon.com
10. [10] Miyamoto Musashi — Wikipedia
11. [11] Izumo no Okuni — Wikipedia
12. [12] Ono no Takamura — Wikipedia

Michael R.

I've been playing video games for over 20 years, spanning everything from early PC titles to modern open-world games. I started Switchblade Gaming to publish the kind of accurate, well-researched guides I always wanted to find — built on primary sources, tested in-game, and kept up to date after patches. I currently focus on Minecraft and Pokémon GO.