Mr. Osomatsu: 4th Season
Role: Meticulous television and film archivist. Task: Write a JSON object for "Mr. Osomatsu" Season 4. Constraints: Use ONLY provided SYNOPSIS and SOURCES. No invented titles, names, dates, counts, awards, ratings, box-office, viewership, or plot points. Omit details not in the material. Style: Original, neutral, encyclopedic prose in plain text. Format: Valid JSON only (no markdown, no asterisks, no headings, no bul
Season 4 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Directly follows the overarching narrative developments of Mr. Osomatsu Season 3.
- Faction dynamics and core character alliances shift under escalating external stakes.
- Crucial mysteries introduced previously reach key turning points and narrative reckonings.
- Sets up serialized story arcs that build directly toward the climactic season finale.
Season overview
Role: Meticulous television and film archivist.
Task: Write a JSON object for "Mr. Osomatsu" Season 4.
Constraints:
Use ONLY provided SYNOPSIS and SOURCES.
No invented titles, names, dates, counts, awards, ratings, box-office, viewership, or plot points.
Omit details not in the material.
Style: Original, neutral, encyclopedic prose in plain text.
Format: Valid JSON only (no markdown, no asterisks, no headings, no bullet points).
Keys: overview (160-220 words), primer (array of exactly 4 concise bullet points).
Synopsis: Matsuno sextuplets and others celebrate a relaxing summer. They are still broke and not trying for employment.
Source [1]: Mr. Osomatsu (2015), TV-14, Animation and Comedy. Overview: Lives of now 20-something NEET Matsuno sextuplets and bizarre adventures in modern day.
Source [2]: Cast & Crew. Lives of now 20-something NEET Matsuno sextuplets and bizarre adventures in modern day.
Source [3]: Japanese adult comedy anime produced by Studio Pierrot, based on Fujio Akatsuka's 1962 manga series, Osomatsu-kun.
Source [4]: Japanese comedy anime television series by Pierrot, based on Fujio Akatsuka's 1962 manga series, Osomatsu-kun. Follows sextuplet Matsuno brothers from the original series as adults.
Overview (Goal: 160-220 words):
I need to expand the synopsis using the sources without inventing anything.
The synopsis says: "Join the Matsuno sextuplets and all the rest as they celebrate what will hopefully be a relaxing summer, if not for the fact that they're still broke and not even trying for employment."
The sources say: "The lives of the now 20-something NEET Matsuno sextuplets and the bizarre adventures they find themselves into in the modern day."
The series is an adult comedy anime produced by Studio Pierrot based on Fujio Akatsuka's 1962 manga series, Osomatsu-kun.
Drafting Overview:
The fourth season of the Japanese adult comedy anime Mr. Osomatsu follows the Matsuno sextuplets as they navigate their lives in the modern day. Produced by Studio Pierrot, the series is based on the 1962
Episode Guide
Season 4 Progress Shield
It's Starting Again
Jul 9, 2025 · 24 min
The sextuplets spend a lazy Tanabata with friends and neighbors.
Watermelon Alien
Jul 16, 2025 · 24 min
The sextuplets get a craving for watermelon, unbeknownst to an intergalactic invasion being underway.
Thunderstorms and Crew Cuts
Jul 23, 2025 · 24 min
A rainy day forces the sextuplets indoors, leading to a series of events involving Ichimatsu's bad new haircut.
Temple Festival
Jul 30, 2025 · 24 min
The sextuplets and their friends get ready for a mysterious temple festival.
Rest / Fishing Hermit
Aug 6, 2025 · 24 min
After the festival, the sextuplets get some rest to ease their injuries. / Two fishermen (Todomatsu and Karamatsu) meet a fishing hermit (Jyushimatsu).
Fans and Time Machines
Aug 13, 2025 · 24 min
After their fan breaks, the sextuplets set off on a time travel mission to recover the fan when it worked, with many failed retrievals made along the way.
Storytime, Jo
Aug 20, 2025 · 24 min
Classic children's tales retold with an Osomatsu bent. A Dog of Flanders with many ludicrous variants of Nello and Patrache's deaths, Snow White has a mysterious power, Hansel and
Ichimatsu and the Thieving Cat
Aug 27, 2025 · 24 min
Ichimatsu tries to domesticate a stray cat known for its human-like thievery, but runs into trouble when his new buddy falls back into their old ways.
The Idiot Series
Sep 3, 2025 · 24 min
Television parodies featuring the Osomatsu cast. The older set does some calisthenics with disastrous results, Jyushipi and Choropi conjure up some magical cooking, the sextuplets
Iyami and the Shy Little Aliens
Sep 10, 2025 · 24 min
After an influx of intergalactic immigrants take residence in Japan, Iyami opens up a maid cafe with some shy multiplying aliens as the main attraction.
The Sextuplets Have the Same Dream
Sep 17, 2025 · 24 min
Like how some twins can feel phantom pains, the sextuplets occasionally have the same dream. Here are two surreal dreams about bodily transformation that the brothers have.
The End of Summer
Sep 24, 2025 · 24 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 c
The Matsuno Ten
Jun 13, 2026 · 23 min
In a parody of 80s music show "The Best Ten", the cast perform retro-styled songs, themed to the sounds of the late Showa era's most popular musicians.