Series synopsis
Mr. Osomatsu, also known as おそ松さん is a Japanese animation comedy television series that premiered on HTB on October 5, 2015. It stars Takahiro Sakurai, Jun Fukuyama, Aya Endo and Yuichi Nakamura.
The lives of the now 20-something NEET Matsuno sextuplets and the bizarre adventures they find themselves into in the modern day.
Premise
The lives of the now 20-something NEET Matsuno sextuplets and the bizarre adventures they find themselves into in the modern day.
Cast and characters
Leading cast
- Takahiro Sakurai as Osomatsu Matsuno (voice)
- Jun Fukuyama as Ichimatsu Matsuno (voice)
- Aya Endo as Totoko (voice)
- Yuichi Nakamura as Karamatsu Matsuno (voice)
- Kazuhiko Inoue as Matsuzou Matsuno (voice)
- Miyu Irino as Todomatsu Matsuno (voice)
- Hiroshi Kamiya as Choromatsu Matsuno (voice)
- Sachi Kokuryu as Chibita (voice)
Supporting cast
- Kujira as Matsuyo Matsuno (voice)
- Daisuke Ono as Juushimatsu Matsuno (voice)
Guest cast
- Shôei as Himself
Episodes
This series spans 5 seasons with 119 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 0 | 31 | January 29, 2016 | October 1, 2025 |
| Season 1 | 25 | October 5, 2015 | March 28, 2016 |
| Season 2 | 25 | October 3, 2017 | March 27, 2018 |
| Season 3 | 25 | October 12, 2020 | March 29, 2021 |
| Season 4 | 13 | July 9, 2025 | June 13, 2026 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Matsu Juice / Virgin Hero Episode 3.5 of Season 1, this OVA replaced Episode 1 on the Season 1 home DVD/BD release. |
January 29, 2016 |
| 2 | Mr. Osomatsu Short Film Series - Word Chain Game | January 29, 2016 |
| 3 | Mr. Osomatsu Short Film Series - Osomatsu Blaster | February 26, 2016 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Osomatsu-kun Returns The Matsuno brothers try to adapt their show to contemporary times, with mixed results. |
October 5, 2015 |
| 2 |
Let's Get a Job/The Melancholy of Osomatsu-kun The Matsuno brothers struggle to find employment. Later, Osomatsu tries to take an interest in his brothers' lives but winds up being a nuisance to them. |
October 12, 2015 |
| 3 |
Tidbits Collection A collection of unrelated shorts starring the wild and wacky cast of Osomatsu-san. A trip to outer space ends in disaster, the Pachinko Police are called in, and a familiar-looking puppet serial killer who can't seem to find the right sextuplet for his reverse-beartrap are among the skits featured. |
October 19, 2015 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Mr. Osomatsu Returns! The 10-year-old Matsuno sextuplets of Osomatsu-kun are given a glimpse of the future and see they're going to get fat, greedy and beaten up by angry girls. |
October 3, 2017 |
| 2 |
Celebrate! New Employment!! / Super Detergent The brothers try their hand as streamers after being chastised by their parents for not having jobs. Later, Iyami uses an experimental detergent to keep his suit clean, but after being confused by the Matsunos as an expensive liquor, is revealed to turn anything invisible (up to a point). |
October 10, 2017 |
| 3 |
Cavematsu-san / Choromatsu and Ichimatsu / Totoko's Challenge Prehistoric versions of the brothers invent ways for them to relive any pent-up urges, with varying degrees of success. Later, Choromatsu and Ichimatsu struggle to make conversation with each other. After, Totoko takes part in an eating contest but keeps getting distracted by the brothers and guest star Shouei. |
October 18, 2017 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Replaced Osomatsu-san returns in an all-new family-friendly incarnation! Surely nothing will go wrong, right? |
October 12, 2020 |
| 2 |
Dimwit Generation / Hatabou EATS / Let's Be Quiet at Night / Doctor T / Triangle Pop / Delivery Choromatsu, Todomatsu, and Ichimatsu discuss their expectations for the show's third season. Hatabou struggles to deliver an online food order. The sextuplets harass a touchy couple. Totoko plays an awful but beautiful doctor. Jyushimatsu and Karamatsu hang out in a konbini and find a strange ad. Two robots powered by AI arrive at the Matsuno home. |
October 19, 2020 |
| 3 |
Dimwit Generation 2 / Estimated Value / Magic Angel Magi Lunatic Ichi Osomatsu, Karamatsu, and Jyushimatsu share their expectations for the new season. The Riceballs estimate the value of the sextuplets' friends, causing embarrassment. Magical powers are given to the wrong girl. |
October 26, 2020 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
It's Starting Again The sextuplets spend a lazy Tanabata with friends and neighbors. |
July 9, 2025 |
| 2 |
Watermelon Alien The sextuplets get a craving for watermelon, unbeknownst to an intergalactic invasion being underway. |
July 16, 2025 |
| 3 |
Thunderstorms and Crew Cuts A rainy day forces the sextuplets indoors, leading to a series of events involving Ichimatsu's bad new haircut. |
July 23, 2025 |
Production
Release
| Original network/platform | HTB |
|---|---|
| First aired | October 5, 2015 |
| Last aired | September 24, 2025 |
| Runtime | 25 minutes |
| Status | Returning Series |
| Schedule | at 01:30:00 |