Mizuki Tsujimura's Lonely Castle in the Mirror Fantasy Novel Gets Anime Film Adaptation in Winter 2022
The manga adaptation ended serialization this month

An anime film adaptation of Mizuki Tsujimura's fantasy novel Kagami no Kojou (English edition title: Lonely Castle in the Mirror) is now in the works for a release in the winter of 2022. Shochiku will work on distribution. Further details such as production company and staff are currently unknown.
The novel was published by Poplar Publishing in Japan in May 2017, and its total print run has surpassed 1.2 million copies. The novel's manga adaptation illustrated by Tomo Taketomi was serialized in Shueisha's Ultra Jump from June 2019 to February 2022, and its final chapter was published in the magazine's latest March 2022 issue published on February 19.
The anime film's official website introduces its story as below:
One day, a mirror in Kokoro's room suddenly began to glow in front of her eyes, as she had lost her place at school and was confined to her room. She walked through the shining mirror to find a mysterious castle-like building. There were seven people in a similar situation to Kokoro. It is said that a secret "key" is hidden in the castle, and whoever finds it will have their wish come true. Why were these seven people gathered together? and where is the key? When everything is revealed, you will be surprised and moved.
????━━━
— 松竹映画宣伝部【公式】 (@shochiku_movie) February 24, 2022
映画『#かがみの孤城』
劇場アニメ化決定!
━━━????#辻村深月 著・2018年本屋大賞を
歴代最多得票数で受賞した
ファンタジーミステリーの最高傑作が
待望の劇場アニメ化!????✨
????公式サイトhttps://t.co/wsU7tkO961
2022年冬 全国公開???? pic.twitter.com/Q71YZTIWE0
Hardcover edition cover:
Bunko edition covers:
Manga adaptation 1st & 4th volume covers:
Source: Shochiku Movie official Twitter, the anime film's official website
© 2022 "Lonely Castle in the Mirror" Production Committee
© 2017 Poplar Publishing Co., Ltd. All Rights Reserved.