Koala E Nikki Anime Adaptation is Finally Coming

Kadokawa has officially announced that Yuami’s manga Koala E Nikki (Koala’s Diary) will receive a web anime adaptation. The series is set to premiere on October 2, 2025, at 8:00 PM JST on the anime’s official YouTube channel. This free release format makes it easily accessible to fans around the world.

Alongside the announcement, the production team revealed a brand-new key visual and a promotional video. Both highlight the warm and comforting atmosphere that defines Koala’s everyday adventures.

Cast and Theme Song

The anime features Aya Uchida as the voice of Koala, the cheerful protagonist with a heart full of optimism. Uchida’s gentle and soothing voice perfectly matches the character’s positive energy.

For the theme song, Punipuni Denki feat. Kan Sano will perform Niji to (With a Rainbow). The track blends cheerfulness with heartfelt emotion, capturing the anime’s themes of hope and positivity.

Staff and Production Team

The project is directed by Takao Kato, known for works like As a Reincarnated Aristocrat, Rockman.EXE Beast, and To Love-Ru. Animation is being handled by Studio Mother, a rising studio praised for its clean and detailed visuals.

Character design is entrusted to Chiharu Hara, who previously contributed to More Than a Married Couple, But Not Lovers. Fans can expect expressive and charming character designs that stay true to Yuami’s original work.

A Heartwarming Story

At its core, Koala E Nikki follows a koala who writes about daily life—whether it’s moments of happiness, sadness, fun, or challenges. No matter the situation, Koala always believes that today is a good day, and tomorrow will be one too.

This simple yet profound message is what makes Yuami’s manga so beloved. It’s light, comforting, and leaves readers with a sense of positivity.

From Social Media to Anime Adaptation

Yuami first launched the manga on their personal X (Twitter) account on June 11, 2021. Its popularity quickly grew, leading Kadokawa to publish a physical edition. The first volume was released in 2022, with the fourth volume hitting shelves on February 14, 2024.

Now, the anime adaptation will bring Koala’s diary to life with moving visuals and heartwarming storytelling. It’s expected to reach new audiences while giving longtime fans a fresh way to enjoy the story.

The arrival of Koala E Nikki anime shows how a simple, heartfelt story can blossom into a warm and meaningful series. With a popular voice actress, a touching theme song, and a strong creative team, this adaptation is set to be one of the most refreshing and uplifting shows of fall 2025.