by Fans of Koupen-chan and Japanese rock band Uchikubi Gokumon Doukoukai have another reason to celebrate. The popular band has reunited with the heartwarming anime for a second special collaboration, bringing its cheerful song “Natsu no Uta” (Summer Song) to Episode 69 of the series.
Released on July 26, 2026, the new episode features a special version of the song’s music video, continuing the successful partnership between the anime and the rock trio. Following the overwhelming popularity of their first collaboration, the latest project combines upbeat summer music with the adorable world of Koupen-chan, offering fans another memorable animated experience.
“Natsu no Uta” Featured in Koupen-chan Episode 69
The collaboration appears in Episode 69, titled “Atsui” (“Hot”), which premiered on July 26, 2026.
Rather than simply using the song as background music, the episode incorporates a special music video sequence for “Natsu no Uta,” allowing viewers to enjoy both the catchy summer anthem and the charming animation featuring Koupen-chan.
The episode celebrates the fun and warmth of the summer season while maintaining the gentle, comforting atmosphere that has made Koupen-chan beloved by audiences of all ages.
A Successful Collaboration Returns
This marks the second collaboration between Uchikubi Gokumon Doukoukai and the Koupen-chan anime.
The first crossover appeared in Episode 44, titled:
“I Don’t Want to Get Out of Bed.”
That episode quickly became a fan favorite and has accumulated more than 1.3 million views, demonstrating the popularity of combining the band’s energetic music with Koupen-chan’s adorable world.
The success of the first collaboration paved the way for this latest summer-themed project.
About “Natsu no Uta”
Although the anime version is new, “Natsu no Uta” is not a brand-new song.
Originally released in 2019, the track is one of Uchikubi Gokumon Doukoukai’s well-known seasonal songs, celebrating the excitement, heat, and unique atmosphere of Japanese summer.
Its upbeat rhythm and humorous lyrics have made it a popular favorite among fans of the band.
For the anime collaboration, the song has been given new life by integrating it into the world of Koupen-chan.
The Original Music Video Featured Koupen-chan
Long before appearing in the anime, “Natsu no Uta” already had a special connection with Koupen-chan.
The song’s official music video featured illustrations of the lovable penguin character created by Rurutea, the original creator of Koupen-chan.
The animated music video was previously released on YouTube, where fans enjoyed the charming combination of the band’s energetic performance and Rurutea’s soothing artwork.
The new anime appearance builds on that earlier collaboration, bringing the song directly into the television series.
Who Is Uchikubi Gokumon Doukoukai?
Uchikubi Gokumon Doukoukai is a Japanese rock band known for blending hard rock, heavy metal, punk, and humor into songs about everyday life.
Rather than focusing on traditional rock themes, many of the band’s songs celebrate relatable topics such as:
- Seasonal weather
- Food
- Daily routines
- Household life
- Common frustrations
- Everyday joys
This unique style has earned the band a loyal following and made its music a natural fit for the lighthearted yet comforting world of Koupen-chan.
What Is Koupen-chan?
Created by illustrator Rurutea, Koupen-chan is one of Japan’s most beloved mascot characters.
The small baby emperor penguin is famous for offering gentle words of encouragement and celebrating even the smallest everyday accomplishments.
Whether reminding someone that getting out of bed is an achievement or cheering people through difficult days, Koupen-chan has become a symbol of kindness, positivity, and emotional support.
Its popularity has led to:
- Anime adaptations
- Picture books
- Merchandise
- Café collaborations
- Pop-up events
- Social media content
The character’s relaxing atmosphere has attracted fans of all ages in Japan and overseas.
Why Fans Love This Collaboration
One of the reasons this partnership has been so successful is the contrast between the two collaborators.
Uchikubi Gokumon Doukoukai is known for its energetic rock music, while Koupen-chan is recognized for its calm and comforting aesthetic.
Together, they create a surprisingly entertaining combination that balances humor, warmth, and catchy music.
Many viewers have praised the collaboration for capturing the fun spirit of summer without losing the wholesome charm that defines Koupen-chan.
A Growing Trend in Anime Music Collaborations
Anime and music collaborations have become increasingly popular in recent years, allowing artists to introduce their songs to wider audiences while giving anime fans fresh and memorable viewing experiences.
Projects like the partnership between Uchikubi Gokumon Doukoukai and Koupen-chan demonstrate how original music can enhance short-form anime content and strengthen the connection between musicians and animation studios.
As collaborations continue to grow in popularity, fans can likely expect more crossover projects featuring original songs, special animated music videos, and exclusive seasonal content.
Final Thoughts
The second collaboration between Uchikubi Gokumon Doukoukai and Koupen-chan brings another dose of fun, positivity, and seasonal charm to the beloved anime. By featuring the band’s energetic 2019 hit “Natsu no Uta” in Episode 69, the series celebrates summer with a lively music video while continuing the successful partnership that began with the widely viewed “I Don’t Want to Get Out of Bed” collaboration.
For fans of heartwarming anime, catchy Japanese rock music, or the lovable penguin created by Rurutea, this latest crossover is a delightful reminder of how music and animation can come together to create joyful and memorable experiences. With the first collaboration surpassing 1.3 million views, this new summer-themed installment is likely to become another fan favorite.
