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Mr. Osomatsu S4E12 — The End of Summer

Mr. Osomatsu•Season 4•Episode 12

The End of Summer

Sep 24, 202524 min

The end of summer has arrived, with Chibita deciding to close up his oden stall and pursue a charitable cause. Osomatsu, frustrated with this sudden change, angrily pressures his childhood buddy to stay.

Directed byYuki Morita, Shigeru Fukase, Nene Futamura

Written byShu Matsubara

Previous episodeE11 · The Sextuplets Have the Same Dream Next episodeE13 · The Matsuno Ten

Seasons4

Season 4 Episodes13

It's Starting Again still

It's Starting Again

Watermelon Alien still

Watermelon Alien

Thunderstorms and Crew Cuts still

Thunderstorms and Crew Cuts

Temple Festival still

Temple Festival

Rest / Fishing Hermit still

Rest / Fishing Hermit

Fans and Time Machines still

Fans and Time Machines

Storytime, Jo still

Storytime, Jo

Ichimatsu and the Thieving Cat still

Ichimatsu and the Thieving Cat

The Idiot Series still

The Idiot Series

Iyami and the Shy Little Aliens still

Iyami and the Shy Little Aliens

The Sextuplets Have the Same Dream still

The Sextuplets Have the Same Dream

The End of Summer still

The End of Summer

The Matsuno Ten still

The Matsuno Ten

Cast10

Takahiro Sakurai

Takahiro Sakurai

Osomatsu Matsuno (voice)

Jun Fukuyama

Jun Fukuyama

Ichimatsu Matsuno (voice)

Aya Endo

Aya Endo

Totoko (voice)

Yuichi Nakamura

Yuichi Nakamura

Karamatsu Matsuno (voice)

Kazuhiko Inoue

Kazuhiko Inoue

Matsuzou Matsuno (voice)

Miyu Irino

Miyu Irino

Todomatsu Matsuno (voice)

Hiroshi Kamiya

Hiroshi Kamiya

Choromatsu Matsuno (voice)

Sachi Kokuryu

Sachi Kokuryu

Chibita (voice)

Kujira

Kujira

Matsuyo Matsuno (voice)

Daisuke Ono

Daisuke Ono

Juushimatsu Matsuno (voice)

Crew12

S

Shu Matsubara

Writer

T

Takashi Koizumi

Key Animation

Y

Yoshimi Iwata

Key Animation

K

Kasumi Wada

Key Animation

T

Tomoko Sato

Key Animation

Y

Yuya Kishi

Key Animation

T

Teruko Takejima

Key Animation

T

Ten Kiyabu

Key Animation

H

Haruo Miyagawa

Prop Designer

M

Maiko Kamijo

Animation Director

S

Shiho Oohisa

Key Animation

Y

Yuki Kikuchi

Key Animation

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Episode Summary

"The End of Summer" is episode 12 of Mr. Osomatsu season 4. Directed by Yuki Morita, Shigeru Fukase, Nene Futamura and written by Shu Matsubara, it aired on September 24, 2025.

Next: E13 · The Matsuno Ten Best of Season 4