Lead: Satoshi Mizukami’s Spirit Circle is getting an 18-episode television anime that begins broadcast and global streaming in December 2026, marking the late Tatsuo Satō’s final directorial work.
What happened
Production company Twin Engine and streamer-side partner REMOW confirmed a full Spirit Circle anime adaptation on November 5, 2026, ten years after the manga’s 2016 finale. The series will run for 18 episodes, with Japanese broadcast and worldwide streaming both starting in December 2026. An official site, teaser visual, first promotional video, main cast, and ending theme were released together with the announcement.
The late Tatsuo Satō (Martian Successor Nadesico, Stellvia, Bodacious Space Pirates) directed the show and handled series composition. After Satō’s death from liver failure in April 2026 at age 61, production continued under assistant director Kentaro Mizuno, with Twin Engine group studios NAGOMI and EOTA completing animation. Satoru Fujimoto is designing the characters.
Main cast includes Kazuki Ura as Fuuta Okeya, Anna Nagase as Kouko Ishigami, Eri Yukimura as Rune, and Yūichi Nakamura as East. Nagase also performs the ending theme “No Matter the World” (Koko ga Donna Sekai Demo), written specifically for the series and previewed in the first PV.
Mizukami serialized Spirit Circle in Shōnengahōsha’s Young King Ours from May 2012 to March 2016. The six-volume manga crossed roughly 800,000 copies in circulation. Crunchyroll ran an English simulpub, and Seven Seas Entertainment published the series in print. Mizukami’s other adaptations include The Lucifer and Biscuit Hammer (2022) and Sengoku Youko (2024).
Why it matters
Spirit Circle is a complete, self-contained reincarnation fantasy rather than an open-ended shonen weekly, so an 18-episode cour is a realistic window to adapt the whole soul-cycle plot. Fans who bounced off endless seasonal drops get a rare “start and finish” promise in the winter slate. The project also closes the career of Satō, a director whose SF and coming-of-age work shaped a generation of late-night anime viewers, which gives the premiere unusual cultural weight beyond franchise marketing.
For English readers, Seven Seas and Crunchyroll already kept the manga visible, so December streaming can convert catalog readers into same-week viewers without a long licensing gap. Twin Engine’s NAGOMI × EOTA pipeline, fresh off other group titles, puts a mid-size studio bet on a cult seinen property instead of another Jump sequel—useful signal for which catalog titles still clear greenlights in 2026.
What we know vs what is rumored
- Confirmed: 18-episode TV anime; Japan broadcast plus global streaming from December 2026; director/series composition Tatsuo Satō (final work); assistant director Kentaro Mizuno; character design Satoru Fujimoto; animation NAGOMI × EOTA; production Twin Engine; cast Ura / Nagase / Yukimura / Nakamura; ED by Anna Nagase.
- Confirmed: Story follows spirit-seeing middle-schooler Fuuta Okeya and transfer student Kouko Ishigami, who share a reincarnation conflict across past lives.
- Unconfirmed: Exact premiere day and clock time in December; international platform partners beyond REMOW’s “stream globally” wording; whether the 18 episodes cover all six manga volumes without cuts; Blu-ray and North American home-video plans.
What happens next
Expect a precise December air date, key episode count split if any, and streaming storefront listings once networks lock winter grids. Watch Twin Engine’s official Spirit Circle site and REMOW channels for cast interviews and a longer trailer before the first episode drops. English viewers should track which global service carries the simulcast week-to-week once the December window opens.
Sources: Anime News Network — Satoshi Mizukami’s Spirit Circle Manga Gets TV Anime in December; PR Times / Twin Engine — Spirit Circle TV anime press release; Official Spirit Circle site; ORICON — Spirit Circle TV Anime Set for December