Netflix's September 29 lineup brings two anime releases with very different identities: LEGO ONE PIECE and Mononoke The Movie: Chapter III - The Curse of the Serpent. Both arrive near the end of September, but they target very different moods and audiences.
LEGO ONE PIECE brings a lighter spin
Netflix describes LEGO ONE PIECE as a two-part special built around Usopp telling a larger-than-life story about the Straw Hats' journey from the East Blue toward the Grand Line. The format combines the familiar One Piece adventure with LEGO's visual language and humor.
The special arrives just after One Piece Episode 1180, which marks the end of the main anime's 2026 television run. That gives Netflix a convenient way to keep the franchise visible while viewers wait for the main anime's 2027 return.
Why the special is accessible
A shorter special has a very different barrier to entry from a series with more than a thousand episodes. Newer viewers can experience familiar characters without immediately committing to the entire One Piece catalog, while longtime fans can enjoy a playful reinterpretation of early events.
Mononoke takes a darker route
Mononoke The Movie: Chapter III - The Curse of the Serpent arrives on the same day. Netflix describes a story set around tragedy inside the Ōoku, where human passions and lingering grudges create a dangerous supernatural threat for the Medicine Seller.
Unlike LEGO ONE PIECE, Mononoke is rooted in psychological horror, mystery and highly stylized supernatural storytelling. The contrast makes September 29 an unusually varied day for anime viewers.
The Medicine Seller remains central
The Mononoke films continue the franchise's focus on the Medicine Seller, a mysterious figure who confronts supernatural manifestations linked to human emotions and unresolved events. Its appeal comes from the investigation as much as the supernatural spectacle.
What else is arriving?
Netflix's September 25 to October 1 guide also lists The Arena on September 30 and The Widower: 'Til Death Do Us Part, alongside other international releases. The platform is clearly using the end of September for a broad mix of movies, series and anime.
Final takeaway
Netflix's September 29 anime lineup is unusually diverse. LEGO ONE PIECE provides a playful take on the Straw Hats' early journey, while Mononoke The Movie: Chapter III continues a much darker supernatural story. Together they offer two very different reasons to open Netflix at the end of September.
Two releases, two very different viewing experiences
The contrast between these releases is useful for understanding Netflix's anime strategy. LEGO ONE PIECE is immediately recognizable, family-friendly in presentation and connected to one of the world's biggest adventure franchises. Mononoke, by contrast, is visually distinctive and aimed at viewers who enjoy supernatural mystery and psychological themes.
Putting both titles into the same weekly schedule gives subscribers a choice between a lighter franchise experience and a more atmospheric film. It also demonstrates how streaming platforms can serve several anime audiences at once rather than relying on one dominant style.
Where these titles fit in the September catalog
Netflix's September schedule is broad, with new original productions, returning franchises, international series and anime arriving throughout the month. The September 29 releases therefore sit inside a much larger catalog refresh. For viewers who use Netflix as their main anime service, the two titles provide a useful change of pace after the platform's other September additions.
Why anime variety matters on streaming
Streaming has made it easier for viewers to move between very different anime styles without changing services. A franchise comedy such as LEGO ONE PIECE can sit beside a visually experimental supernatural film and reach different parts of the same audience. That variety also helps viewers discover older or less conventional properties through recommendation systems and weekly release guides.