Licensing company REMOW revealed that the Spirit Circle anime will air in December 2026 as an 18-episode TV series based on the supernatural manga created by Satoshi Mizukami [1]. Twin Engine is producing the show in partnership with animation studios NAGOMI and EOTA, planning both Japanese broadcasts and global web streams for the same winter release window [2]. News outlet Comic Natalie first reported the adaptation details alongside comments from the staff [3]. The series serves as the final work of director Tatsuo Sato, who passed away in April 2026 [1]. Assistant director Kentaro Mizuno guided the studio crew to finish the remaining episodes, keeping Sato’s plans for a story that moves through seven past lives [2].
Creative Team for Spirit Circle Anime
Director Tatsuo Sato wrote the series scripts and directed the early episodes before his death in April 2026, having built a reputation on classic science fiction anime like Martian Successor Nadesico, Stellvia, and Bodacious Space Pirates [1]. Assistant director Kentaro Mizuno stepped in to finish the show [2].
Animation work belongs to NAGOMI and EOTA, two studios owned by the Twin Engine Group. Satoru Fujimoto designs the cast. Fujimoto previously worked on later seasons of the Symphogear franchise and brings that background to adapt Mizukami’s distinctive visual art for TV [2]. In a joint statement, NAGOMI, EOTA, and Twin Engine praised Sato’s deep craft knowledge, with Mizuno calling the show a coming-of-age journey that blends youthful adventure with science fiction across all 18 episodes. Mizuno asked viewers to experience the complete run to see how the team brought each past era to life [1].
Manga author Satoshi Mizukami said building the world for the TV show was a big test for the staff. Mizukami explained: “It’s a story that takes us through seven different lives, each set in a different time and place.” He thanked Sato and the studio crew for fitting the complete manga into a run that is longer than one cour but shorter than two [1].
Seven Lifetimes of Reincarnation
The lead figure is Fuuta Okeya. Fuuta is 14 years old. The middle school boy can see spirits and hides a birthmark beneath a cheek bandage, living a quiet life until transfer student Kouko Ishigami suddenly arrives in his classroom [3].
Kouko spots the mark under his bandage and attacks him at school, calling the facial mark a curse she engraved upon him centuries ago over a grudge that survived across past lives [3]. Confused by her hostility, Fuuta uses the Spirit Circle to relive his previous incarnations. The circular tool sends his soul into past eras and future worlds, revealing how their shared grudges began [1]. Comic Natalie noted that Fuuta’s dreams tie directly to the memories of these earlier identities, showing how their ancient feud grew over centuries [3].
Fuuta travels through seven separate lives, jumping from ancient tribes to advanced future cities where the two souls meet, fight, and form deep bonds across centuries of rebirth [1]. Fuuta must decide if he can end the cycle of revenge or if their conflict will continue forever [2].
Voice Cast in Spirit Circle Anime
The cast announcement introduced the lead voice talent for the Spirit Circle anime. Kazuki Ura stars as Fuuta Okeya, voicing a student who inherits strong emotions from centuries of earlier lives. Ura said Fuuta is a normal kid thrown into strange events as past memories wake inside him. Anna Nagase plays Kouko Ishigami, capturing both her fierce drive and hidden pain. Nagase said she read all six manga volumes in a single day after learning about the role, finding herself drawn to Kouko’s mixture of anger, sorrow, and resolve [1].
Eri Yukimura voices Rune, a spirit who stays beside Kouko as a comforting friend, while Yuichi Nakamura plays East, a figure who ties into the wider mystery surrounding their past [3]. Nakamura told viewers to watch closely as the setting shifts across eras [1].
The voice cast had to portray characters whose relationships change across different historical timelines, with Nagase balancing Kouko’s anger with real grief while Ura gave Fuuta a blend of humor and sorrow. Their work brings warmth to the central drama as the leads confront their shared history [1].
Ending Theme Details
Voice actress Anna Nagase also sings the ending theme for the anime [1]. The track is titled “No Matter the World,” known in Japanese as “Koko ga Donna Sekai demo” [3]. The release marks her very first solo song [1].
UiNA wrote the lyrics for the song, while Tatsuya Kato handled composition and musical arrangement. Kato built a sweeping melody to match the broad scope of seven lives meeting across centuries. Nagase said the words caught her attention because they mix quiet prayers with raw feelings of cruelty and warmth. She approached the recording by thinking about Kouko’s unresolved attachments, singing to express both the lingering sadness and the quiet hope that bind the characters together across rebirths [1].
Twin Engine’s first teaser trailer shares an early taste of the music and dialogue, showing how fast ordinary school days give way to spiritual battles between Fuuta and Kouko. The sound design sets a thoughtful mood, helping viewers follow the story as it moves between modern Japan and ancient times [1].
Manga Roots and Broadcast Schedule
Satoshi Mizukami serialized Spirit Circle in Shonengahosha’s monthly magazine Young King OURs from 2012 to 2016. The manga wrapped up with six collected volumes [3]. Readers know Mizukami for earlier fantasy manga such as Lucifer and the Biscuit Hammer, Planet With, and Sengoku Youko, all of which earned anime adaptations. Seven Seas Entertainment licensed the series in English, releasing all six volumes in physical print and digital stores [2]. The anime arrives on the tenth anniversary of the manga’s finale, giving longtime fans a complete look at the story on screen [1].
Japanese TV broadcasts and global streams for the Spirit Circle anime will start in December 2026, though specific international streaming platforms have not yet been named by REMOW. The 18-episode run lets the team adapt all six volumes without cutting major story arcs. While other television projects like Ghost of Tsushima: Legends moved to a 2028 broadcast, Twin Engine locked in an eighteen-episode run for late 2026. Assistant director Mizuno finished the episodes on time, keeping Sato’s original creative vision intact [1].
- ONLINE NEWS Johnson, E. (2026, November 5). Spirit Circle Anime Adaptation Announced for December 2026, Revealing Trailer, Cast, and 18-Episode Run. OtakuKart. [Article Link]
- ONLINE NEWS Tan, M. (2026, November 5). Spirit Circle TV Anime to Debut in December 2026. Anime Trending. [Article Link]
- ONLINE NEWS Jovanovic, M. (2026, November 5). Spirit Circle TV Anime Announced for December 2026, Reveals Cast and First Trailer. Anime Corner. [Article Link]
