Mr. Osomatsu 4th season

Mr. Osomatsu returns for its fourth season with thirteen episodes of comedy chaos featuring the beloved sextuplets. The series premiered on July 9th, 2025, and continues the tradition of following six unemployed brothers navigating their 20s with trademark irreverence and humor. This season blends comedy with sci-fi and slice-of-life elements as the sextuplets encounter new situations, new characters, and perhaps new dimensions to their perpetually chaotic existence.

The fourth season maintains the show's signature style of rapid-fire gags and absurdist humor that has defined the franchise since its debut. Viewers should expect the same blend of mundane daily struggles and outlandish scenarios that made previous seasons appealing to fans of surreal comedy. The series airs weekly throughout the summer season, offering consistent new episodes for those following along in real time.

Note that the final episode experienced production delays beyond its originally scheduled October 2025 air date. Episode 12.5 aired in its place, with the true thirteenth episode eventually premiering in June 2026 as part of the franchise's tenth anniversary celebration. Those catching up should be aware this season's conclusion arrived significantly later than typical weekly airings.