A decade after its manga concluded, Spirit Circle is finally making its way to television as an anime. Satoshi Mizukami’s acclaimed story of reincarnation, unfinished conflicts and connections spanning seven lifetimes is also taking on added significance as the final directorial work of Tatsuo Sato. With an 18-episode adaptation announced for December 2026, here’s why this long-awaited project deserves attention.
A Decade-Long Wait Comes to an End
Ten years after its manga concluded, Satoshi Mizukami’s Spirit Circle is finally getting a television anime adaptation. Twin Engine has unveiled the first teaser trailer, visual and main cast, confirming a December 2026 broadcast and streaming debut. The 18-episode series also marks the final directorial work of Tatsuo Sato, who passed away in April.
A Story Spanning Seven Lifetimes
Originally serialised in Shonen Gahosha’s Young King OURs between 2012 and 2016, Spirit Circle follows Fuuta Okeya, a middle-school student who can see spirits. His ordinary life changes when mysterious transfer student Kouko Ishigami declares him her enemy and reveals that their conflict stretches back through previous lives.
A Mystery That Crosses Time
To understand why Kouko is determined to end their connection, Fuuta uses an object called the Spirit Circle to experience his past lives. His journey takes him across seven different lifetimes, spanning eras from the distant past to the future. Each incarnation reveals another part of the history connecting the two characters, gradually uncovering the choices and consequences behind their present conflict.
Rather than using reincarnation simply as a way to revisit familiar characters, the manga builds its mystery around how relationships and unresolved conflicts can shape lives across vastly different periods.
An Adaptation With a Special Significance
The anime is directed and composed by Tatsuo Sato, known for Martian Successor Nadesico, Stellvia and Bodacious Space Pirates. Following his passing in April 2026, production was completed under the leadership of assistant director Kentaro Mizuno, with the team carrying forward Sato’s vision.
The animation is being handled by NAGOMI and EOTA. Kazuki Ura voices Fuuta, while Anna Nagase plays Kouko. Nagase also performs the ending theme, titled Koko ga Donna Sekai demo.
Why This Anime Is Worth Watching
With 18 episodes, the adaptation has room to explore a story that moves between seven lives, different eras and changing identities. Its central mystery offers more than a conventional reincarnation narrative, examining how past choices can shape the present and whether a seemingly endless conflict can ever find resolution.
For viewers discovering Spirit Circle for the first time, December brings an opportunity to experience one of Mizukami’s completed manga stories in animated form.