The anime was first announced June 30, 2017, via Junji Ito's page on the Asahi Shimbun website.

[9] Shinobu Tagashira, known for his directorial work on Diabolik Lovers, directed and created the character design for the anime.

[9][10] The announcement also revealed that the series would adapt from two of Ito's manga collections, the 11 volume Junji Ito Masterpiece Collection and the single volume Fragments of Horror,[9] but did not specify which stories would be adapted, as the staff wanted viewers to be surprised when the show aired.

[13] Additionally, the series received an advance showing on December 23, 2017, which was attended by Ito and voice actor Yūji Mitsuya.

[14] The series is being simulcast on Crunchyroll worldwide outside of Asia, and Funimation began streaming an English dub on January 20, 2018.