Cagaster of an Insect Cage (Japanese: 虫籠のカガステル, Hepburn: Mushikago no Kagasuteru) is a Japanese manga series by Kachō Hashimoto released from 2015 to 2016 in the serialized magazine Monthly Comic Ryū.

[4] A Netflix anime adaptation of Hashimoto's manga was originally announced in 2018 with Koichi Chigira directing the series at Gonzo.

[5] However, Studio Kai, a company spin-off of Gonzo, took over the series' production.

[6] Shūichi Kōyama was in charge of the series composition, and Hitomi Kuroishi composed the score; Akihiko Yamashita adapted the character designs for animation.

On December 11, 2020, it was announced that Sentai Filmworks has licensed the anime for home media.