Wonder Cat Kyuu-chan (ふしぎねこのきゅーちゃん, Fushigi Neko no Kyū-chan) is a Japanese four-panel manga series written and illustrated by Sasami Nitori.

It was serialized on Kodansha's Twi4 Twitter account and Saizensen website from January 2018 to December 2022.

Written and illustrated by Sasami Nitori, Wonder Cat Kyuu-chan was serialized on Kodansha's Twi4 Twitter account and Saizensen website from January 30, 2018 to December 2, 2022.

[7] On July 7, 2020, in commemoration of Seikaisha's 10th anniversary, a collaboration between it and anime studio MAPPA was announced.

[2] In 2018, the series was nominated for the 4th Next Manga Awards in the web category and was ranked 9th.