Mr. Osomatsu 4th season

Synopsis

The fourth season of Osomatsu-san. The sextuplets run amok for a fourth time! Now adults in their 20s, they are still unemployed, undertrained, and single…but there’s something lovable about Japan’s most famous sextuplets. As a new chaotic adventure begins, what’s next? New friends? New trouble? And perhaps a new side to the sextuplets? Let’s all laugh together with these brothers who are beyond any hope. (Source: Crunchyroll) Notes: - Initially meant to air its episode 13 on October 1st, 2025, though instead aired an episode 12.5. After airing episode 12.5, the production stated the actual episode 13 was in production, however delayed indefinitely - The 13th episode was later announced as a part of the Osomatsu-san 10th anniversary event in 2026, where it first received a limited theatrical pre-screening between June 6th to June 11th, with a later early streaming release taking place from June 12th. It was then finally broadcast on June 13th, 2026.

Trailer

Characters & Voice Actors

Ichimatsu MatsunoMain

Jun FukuyamaJP

Osomatsu MatsunoMain

Takahiro SakuraiJP

Jyushimatsu MatsunoMain

Daisuke OnoJP

Todomatsu MatsunoMain

Miyu IrinoJP

Karamatsu MatsunoMain

Yuuichi NakamuraJP

Choromatsu MatsunoMain

Hiroshi KamiyaJP

ChibitaSupporting

Sachi KokuryuuJP

ShakeSupporting

Kazutomi YamamotoJP

IyamiSupporting

Kenichi SuzumuraJP

NarratorSupporting

Hiroshi KamiyaJP

Matsuyo MatsunoSupporting

KujiraJP

HatabouSupporting

Momoko SaitouJP

Staff

Fujio AkatsukaOriginal Creator

Hiromi KikutaSound Director

Seiki TamuraArt Director

Yukari HashimotoMusic

Kumiko SakamotoEditing

Shuu MatsubaraSeries Composition

DA PUMPTheme Song Performance (OP)

Eiji AbikoCharacter Design

Relations

PrequelMr. Osomatsu 3rd season

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