Also known as: 八十亀ちゃんかんさつにっき
Yatogame-chan Kansatsu Nikki (八十亀ちゃんかんさつにっき, lit. "Yatogame-chan Observation Diary") is a Japanese four-panel manga series written and illustrated by Andou Masaki. An anime television series adaptation by Saetta premiered from April 4 to June 20, 2019. A second season has been announced.