Kaiju Decode: The Ring of Aidara shows first trailer and premieres in 2027

Tsuburaya Productions and Toei Animation have released the first teaser trailer for Kaiju Decode: The Ring of Aidara, their new CG animated film. The video comes with a third key visual and a specific release window: 2027, with no exact date yet.

The project team made the announcement through its official channels, and the Sakai Film Office website, the city where the story is set, has updated its page with the synopsis and the names of the main staff.

Third key visual for Kaiju Decode: The Ring of Aidara. ©円谷プロ・東映アニメーションanitrendz.net

Two opposing worlds in Sakai

Kaiju Decode: The Ring of Aidara is part of the Kaiju Decode transmedia project, which started at the 2019 Tsuburaya Convention and has already led to an animated short and a virtual reality experience. Now the project makes the leap to feature film with this co-production between Tsuburaya, the house of Ultraman, and Toei Animation.

The plot, as described by the Sakai Film Office, centers on two characters who live in opposite worlds. Maru is a young man who lives in the City, a peaceful society freed from the restrictions of body, mind, space, and time. Coco, on the other hand, belongs to the Aidara tribe and lives in the Zone, a hostile territory inhabited by colossal beasts. The film tells how two opposing characters search for a path toward a shared future.

The story revolves around two opposing characters who search for a path toward a shared future.

Staff and cast

Direction is handled by S/N, and production is credited to ARECT and Toei Animation. The script is written by Katsuie Shibata. Kaiju design is by Masayuki Goto of Tsuburaya Productions, known for his work as Gridman designer on SSSS.GRIDMAN.

Character designs are split between two names. Sei Nakashima designs Maru, while Masatsugu Saito, character designer of Expelled from Paradise, handles Coco. The announced cast includes Aya Yamane as Maru and Karin Takahashi as Coco.

In October 2025, the Sakai Festival collaborated with Kaiju Decode to organize a series of exclusive events in the city, a way to warm up the ground for the premiere. The Sakai Film Office website promises regular updates until the film hits theaters next year, and the exact date and screening locations are expected to be confirmed in the coming months.