Koala's Diary is a oNA (web) anime that premiered in fall 2025, produced by studio MOTHER.

About the production: the story comes from a manga, there are 49 episodes of about 2 minutes and its current status is "finished".

Its main genres are slice of life, with themes such as Anthropomorphism, Primarily Animal Cast, No Dialogue and Iyashikei.

On AniList, Koala's Diary has an average score of 57%, an average score, and appears on 594 users' lists.

The manga is about Koala who writes about daily life, whether it's good or bad, happy or sad, Koala treats every day as a precious day. Koala believes that today is a good day, and tomorrow will be a good day too. (Source: Anime News Network)

Official synopsis from AniList.