Tatsuya Suganuma’s manga series, “Nice Prison,” has officially ended its serialization in Shueisha’s Weekly Shonen Jump magazine with its 19th chapter. The comedic shonen series, which only began its run in April 2025, concludes as part of a notable wave of cancellations within the popular manga anthology this year.
The final chapter, Chapter 19, was released this week, bringing the story of model prisoner Horo Mitsuboshi and the wild Nobana-shi Prison to an early close. “Nice Prison” was also available for international readers on Shueisha’s MANGA Plus platform.
A Brief Stint in Shonen Jump
“Nice Prison” introduced readers to the unique premise of a prison city where protagonist Horo Mitsuboshi, born and raised within its walls, strives to bring peace and “niceness” to the chaotic environment. The series quickly gained attention for its distinct blend of comedy and shonen action. However, its run proved to be significantly shorter than many other Weekly Shonen Jump titles, concluding after just 19 chapters, only a few months after its debut.
Part of a Larger Trend: Shonen Jump’s 2025 Cancellations
The cancellation of “Nice Prison” marks a significant milestone for Weekly Shonen Jump, making it the tenth major series to conclude its run in 2025 alone. This year has seen considerable changes for the magazine, following the end of long-running series like My Hero Academia and Jujutsu Kaisen in late 2024.
While some series, such as Undead Unluck and Mission: Yozakura Family, were able to reach their natural conclusions, a majority of the ten titles that have ended in 2025 were reportedly cancelled to make room for new additions to the magazine’s lineup. “Nice Prison” falls into this category, with its abrupt ending indicating a cancellation rather than a planned conclusion by the author.
The rapid turnover reflects Weekly Shonen Jump‘s ongoing strategy of refreshing its content and fostering new talent, even if it means short runs for series that don’t quickly find a strong footing with readers. Fans of Tatsuya Suganuma’s work can still explore his other comedic and fantasy manga titles, including “Kakusan sunna,” “Little Red Riding Hood,” and “The Tortoise and the Hare.”
