Mononoke The Movie: Chapter III – The Curse of the Serpent (2026): Trailer, Release Date, Story, Cast & Netflix Details

The Medicine Seller is facing his most terrifying enemy yet.

Netflix is bringing the Mononoke movie trilogy to its final chapter with Mononoke The Movie: Chapter III – The Curse of the Serpent, the supernatural horror anime that sends the Medicine Seller back into the mysterious world of the Ōoku for one final battle.

The third film follows The Phantom in the Rain (2024) and The Ashes of Rage (2025), bringing the trilogy’s story inside the Edo-period women’s quarters to its conclusion.

This time, the focus shifts to Lady Yukiko, the official consort and the highest-ranking woman in the Ōoku.

When tragedy strikes inside the palace, human passions, resentment and buried grudges give birth to a terrifying new mononoke — a Snake God that becomes the Medicine Seller’s most formidable opponent yet.

Netflix has confirmed that Mononoke The Movie: Chapter III – The Curse of the Serpent premieres worldwide on September 29, 2026, exclusively on Netflix.

Here’s everything to know about the final Mononoke movie, including the trailer, release date, story, cast, the Snake God, Lady Yukiko, the Medicine Seller and how to watch all three movies.

Mononoke The Movie: Chapter III Release Date

Mononoke The Movie: Chapter III – The Curse of the Serpent premieres September 29, 2026, exclusively on Netflix.

Netflix officially announced the September 29 date alongside the film’s main trailer and key art on August 19, 2026.

The film originally opened in Japanese theaters on May 29, 2026, before its worldwide Netflix release.

Mononoke Chapter III: The Curse of the Serpent at a Glance

Watch the Mononoke The Movie: Chapter III Trailer

The new official trailer sets up the final confrontation between the Medicine Seller and a new supernatural threat lurking within the Ōoku.

At the center of the story is Lady Yukiko, whose position as the official consort makes her the highest-ranking woman featured in the trilogy.

But the real danger is what emerges from the human emotions surrounding her.

The official Netflix synopsis describes a tragedy inside the Ōoku in which twisted human passions and festering grudges create the Medicine Seller’s most fearsome opponent yet.

The trailer also features the film’s theme song, “No Epilogue” by AiNA THE END.

What Is Mononoke The Movie: Chapter III About?

The Curse of the Serpent takes place in the Ōoku, the lavish and highly restricted inner chambers of the Edo-period imperial palace.

After the events of the previous two films, the Medicine Seller senses that something is still deeply wrong inside the palace.

A new tragedy triggers another supernatural manifestation.

This time, the enemy is a Snake God.

The creature emerges from the accumulated emotions, grudges and passions of the people trapped within the Ōoku, becoming a threat unlike the spirits the Medicine Seller has faced before.

But defeating a mononoke isn’t simply a matter of fighting it.

The Medicine Seller must uncover the three things necessary to exorcise it:

Form. Truth. Reason.

Netflix’s official description identifies the Snake God as the Medicine Seller’s most fearsome opponent yet.

Who Is Lady Yukiko?

Lady Yukiko is the central woman of Chapter III.

The trilogy has deliberately changed its female focus with every installment.

Chapter I, The Phantom in the Rain, follows a newly arrived maid.

Chapter II, The Ashes of Rage, moves upward to the Ochurou, the elite concubines of the Ōoku.

Chapter III goes even higher, focusing on the Midaidokoro, the official consort and the highest-ranking woman within the story.

Netflix says this progression is one of the defining structural elements of the trilogy.

That means The Curse of the Serpent isn’t simply introducing another monster.

It is bringing the trilogy’s exploration of the women of the Ōoku to its highest level of social and political power.

Who Is the Medicine Seller?

The Medicine Seller is the mysterious protagonist at the center of the Mononoke franchise.

He travels from place to place investigating supernatural manifestations known as mononoke.

But these spirits aren’t simply traditional monsters.

They are connected to human emotions, particularly things such as resentment, obsession, grief, hatred and unresolved trauma.

To defeat a mononoke, the Medicine Seller must uncover its Form, Truth and Reason.

That unusual structure is one of the defining features of the franchise.

And in Chapter III, the Medicine Seller faces what Netflix calls his most fearsome opponent yet.

What Is the Snake God in Mononoke Chapter III?

The Snake God, or Hebigami, is the supernatural threat at the center of Chapter III.

After tragedy strikes inside the Ōoku, human passions and accumulated grudges manifest as this terrifying entity.

The creature is particularly dangerous because the conflict isn’t simply physical.

As with other Mononoke stories, the Medicine Seller must understand the human emotions and circumstances that created the supernatural threat.

The official Japanese Netflix description says the tragedy surrounding the emperor’s successor awakens the Snake God, which stands before the Medicine Seller as an unprecedentedly powerful enemy.

Why Is the Ōoku So Important?

The Ōoku is more than just the setting of the trilogy.

It is effectively the fourth major character.

The enormous palace is filled with hierarchy, rules, secrets, jealousy and competition.

Every film uses that environment to explore a different group of women and the pressures placed upon them.

That is why the supernatural horror in Mononoke is so closely tied to psychology.

The monsters don’t simply appear randomly.

They are born from the emotional environment around them.

Netflix describes the trilogy as being set against the lavish backdrop of the Ōoku while exploring the internal anguish of women from different social positions.

How the Mononoke Movie Trilogy Is Connected

The three movies are connected through both their setting and their overarching exploration of the Ōoku.

Chapter I — The Phantom in the Rain

The trilogy began with Mononoke The Movie: The Phantom in the Rain in 2024.

The story focused on newcomers entering the women’s quarters and introduced the Medicine Seller into the movie trilogy’s version of the Ōoku.

Netflix currently has the film available to stream.

Chapter II — The Ashes of Rage

The second chapter, The Ashes of Rage, arrived in 2025.

Its story shifted attention toward the Ochurou, the elite concubines of the Ōoku.

It continued building the larger mystery surrounding the palace and the supernatural forces emerging from its inhabitants.

Chapter III — The Curse of the Serpent

The final chapter moves to the Midaidokoro, the highest-ranking woman in the Ōoku.

The Medicine Seller now faces the Snake God while the trilogy’s long-running story reaches its climax.

Netflix officially calls Chapter III the grand finale of the Mononoke film trilogy.

Do You Need to Watch the First Two Mononoke Movies?

Yes, it is strongly recommended.

While each Mononoke story revolves around its own supernatural mystery, the three movies form a larger trilogy set within the Ōoku.

Netflix specifically notes that the three chapters contain foreshadowing planted from the beginning of the trilogy, with each film building toward the final chapter.

The best viewing order is:

1. Mononoke The Movie: The Phantom in the Rain — 2024
2. Mononoke The Movie: Chapter II – The Ashes of Rage — 2025
3. Mononoke The Movie: Chapter III – The Curse of the Serpent — 2026

Both earlier chapters are currently streaming on Netflix.

Mononoke Chapter III Voice Cast

The Japanese voice cast brings back Hiroshi Kamiya as the Medicine Seller while introducing and returning a large ensemble of characters connected to the Ōoku.

Hiroshi Kamiya as the Medicine Seller

Hiroshi Kamiya returns as the voice of the Medicine Seller.

He remains the central figure of the trilogy and the character tasked with uncovering the supernatural mystery behind the Snake God.

Atsumi Tanezaki as Yukiko

Atsumi Tanezaki voices Yukiko, the central woman of Chapter III.

Her position as the official consort makes her the highest-ranking woman at the center of the trilogy’s final chapter.

Miyu Irino as Tenshi

Miyu Irino voices Tenshi, the Emperor.

Kenjiro Tsuda as Hokuto Mizorogi

Kenjiro Tsuda voices Hokuto Mizorogi.

Tsuda’s recognizable voice is particularly well suited to the dark, psychologically intense atmosphere of the Mononoke franchise.

Yoshiko Sakakibara as Suikoin

Yoshiko Sakakibara voices Suikoin.

Tomoyo Kurosawa as Asa

Tomoyo Kurosawa returns as Asa.

Yoko Hikasa as Fuki Tokita

Yoko Hikasa voices Fuki Tokita.

Haruka Tomatsu as Botan Ōtomo

Haruka Tomatsu voices Botan Ōtomo.

Additional Voice Cast

The cast also includes:

• Yuki Kaji as Saburomaru Tokita
• Jun Fukuyama as Hiramoto Saga
• Daisuke Hosomi as Sakashita
• Cho as Yoshimichi Tokita
• Ryo Horikawa as Fujimaki
• Yukana as Amanotsubone
• Fumi Hirano as Tokiwai
• Mariko Honda as Kawa
• Eiji Takemoto as Saku Mizorogi
• Miyuki Sawashiro as the Third Midaidokoro

Netflix currently lists Hiroshi Kamiya, Atsumi Tanezaki, Miyu Irino, Kenjiro Tsuda, Yoshiko Sakakibara, Tomoyo Kurosawa, Yoko Hikasa, Haruka Tomatsu, Yuki Kaji and Jun Fukuyama among the cast.

Mononoke Chapter III Staff

The final movie is directed by a team that includes several returning Mononoke veterans.

Netflix confirms Kenji Nakamura as chief director, Tomoaki Koshida as director and Yasumi Atarashi as screenwriter.

Who Created the Mononoke Anime?

The original Mononoke television anime premiered in the 2000s and follows the mysterious Medicine Seller as he investigates and exorcises supernatural entities born from human passions and grudges.

The movie trilogy expands that world while placing the story within the Ōoku.

The franchise itself is a spin-off of Ayakashi: Samurai Horror Tales.

Kenji Nakamura, who served as chief director of the original Mononoke anime, continues to play a major creative role in the movie trilogy.

Mononoke Chapter III Theme Song

The theme song for The Curse of the Serpent is:

“No Epilogue” — AiNA THE END

The song accompanies the final chapter of the trilogy and reinforces the movie’s focus on closure, tragedy and the end of the Medicine Seller’s journey through the Ōoku. Netflix officially confirmed AiNA THE END as the performer.

What Makes Mononoke The Movie So Different?

The Mononoke franchise has always stood apart because of its distinctive visual style and psychological approach to horror.

This isn’t conventional jump-scare anime.

The horror comes from human emotion.

Anger.

Jealousy.

Grief.

Resentment.

Obsession.

And guilt.

The supernatural creatures are manifestations of those emotions, meaning that solving the mystery requires understanding the people behind the haunting.

Netflix describes the new movie as surreal, chilling, visually striking, psychological and rooted in myths and legends.

Where to Watch Mononoke The Movie: Chapter III

Is Mononoke Chapter III on Netflix?

Yes.

Mononoke The Movie: Chapter III – The Curse of the Serpent premieres September 29, 2026, exclusively on Netflix.

Netflix’s official page lists the movie as a 2026 anime and confirms its horror, mystery, thriller and psychological genres.

Where Can I Watch the First Two Mononoke Movies?

Both previous chapters are available on Netflix:

• Mononoke The Movie: The Phantom in the Rain
• Mononoke The Movie: Chapter II – The Ashes of Rage

Netflix’s official announcement confirms that both films are currently streaming ahead of the final chapter.

Is Mononoke Chapter III a Netflix Original?

Netflix is the global streaming home for the movie and is premiering it worldwide on September 29.

The film was produced through Studio KAFKA and EOTA and distributed by TWIN ENGINE.

Mononoke Chapter III FAQ

When does Mononoke The Movie: Chapter III come out?

Mononoke The Movie: Chapter III – The Curse of the Serpent premieres September 29, 2026 on Netflix worldwide.

Is Mononoke Chapter III the final movie?

Yes.

The Curse of the Serpent is the third and final film in the current Mononoke movie trilogy. Netflix officially describes it as the grand finale of the trilogy.

What is Mononoke Chapter III about?

The Medicine Seller investigates a new tragedy inside the Ōoku and confronts a terrifying Snake God born from human passions and festering grudges.

Who is the main character in Mononoke Chapter III?

The mysterious Medicine Seller, voiced by Hiroshi Kamiya, remains the central protagonist.

Who is Lady Yukiko?

Yukiko is the official consort, known as the Midaidokoro, and the highest-ranking woman at the center of Chapter III.

What is the Snake God?

The Snake God is the powerful mononoke that emerges after tragedy strikes within the Ōoku. It becomes the Medicine Seller’s greatest supernatural threat in the final chapter.

Do I need to watch Mononoke Chapter I and II first?

It is strongly recommended. The trilogy contains continuing threads and foreshadowing across all three films.

Where can I watch Mononoke Chapter I?

Mononoke The Movie: The Phantom in the Rain is streaming on Netflix.

Where can I watch Mononoke Chapter II?

Mononoke The Movie: Chapter II – The Ashes of Rage is also available on Netflix.

What is the Mononoke Chapter III theme song?

The theme song is “No Epilogue” by AiNA THE END.

Is Mononoke Chapter III a horror anime?

Yes. Netflix categorizes the film under horror, mystery, thriller and anime, while describing it as surreal, chilling, psychological and visually striking.

Who directed Mononoke Chapter III?

Tomoaki Koshida directed the movie, with Kenji Nakamura serving as chief director.

Is Mononoke Chapter III connected to the original 2007 anime?

Yes. The movie trilogy is based on the Mononoke anime franchise and continues its story world centered on the Medicine Seller.

Mononoke The Movie: Chapter III – The Curse of the Serpent isn’t simply another supernatural anime movie.

It is the final chapter of the Ōoku trilogy.

Across three films, Mononoke has moved through different levels of the palace hierarchy, using each group of women to explore another side of human emotion, repression and resentment.

Now the story reaches the highest level.

Lady Yukiko. The official consort. The Emperor’s court. And the most terrifying mononoke yet.

The Medicine Seller’s final enemy is the Snake God, a creature born from the very emotions that have made the Ōoku such a dangerous place.

And this time, there may be no higher chamber left to enter.

Netflix is bringing the trilogy’s final chapter worldwide on September 29, 2026.

So if you’ve been following The Phantom in the Rain and The Ashes of Rage, this is the chapter that finally puts the pieces together.

The Medicine Seller returns. The Snake God awakens. And the Mononoke trilogy reaches its final exorcism.

Mononoke The Movie: Chapter III – The Curse of the Serpent premieres September 29, 2026, only on Netflix.