Satoshi Mizukami's manga Spirit Circle is getting a TV anime that will begin broadcasting and streaming in December 2026, according to a Comic Natalie report published November 5, 2026. It is the final directorial work of Tatsuo Sato (Martian Successor Nadesico), who died in April.
Sato was leading the production as director and series composer. With assistant director Kentaro Mizuno at its center, the staff carried on Sato's intentions and completed the series. NAGOMI and EOTA, both part of the Twin Engine group, are co-animating, and Twin Engine is credited with production. In a joint comment, the three companies said they had inherited the intentions Sato put into the work and were able to finish it. Mizuno's comment says the series runs 18 episodes.
Kazuki Ura voices Fuuta Okeya and Anna Nagase voices Kouko Ishigami. Eri Yukimura and Yuichi Nakamura also join the cast.
A teaser visual and the first PV were also released. The PV includes character voices and opens with Kouko telling Fuuta, "I need you to die seven more times!!" (translated). It goes on to show scenes from the two characters' past lives, including Kouko killing Fuuta's soul and repeatedly trying to break his cycle of reincarnation. Nagase also sings the ending theme, "Koko ga Donna Sekai demo" (gloss: "No Matter What World This Is"), her first solo song.
Spirit Circle is a reincarnation fantasy. Fuuta, a middle school student who can see ghosts, meets Kouko, a mysterious transfer student who suddenly tries to kill him because of a fateful connection from their past lives. To learn the truth, Fuuta uses the Spirit Circle, a tool that lets him relive past lives, and travels through several of them from ancient times to the future. In his comment, Mizukami described it as a story that moves through seven lives in different eras and settings, and thanked the staff and Sato for their work on the adaptation.
The manga began in Shonen Gahosha's Young King OURs in 2012 and ended in March 2016. It is collected in six volumes.