YMMV / Osomatsu-kun

• Awesome Music:
  • The ending of the 1988 animated adaptation, "Osomatsu-kun Ondo". It's catchy enough that even the characters (particularly Totoko) often sing it throughout the show.
  • Same can be said for the 1988 series' opening, "Seicho Osomatsu-bushi"; there's a reason why it's pretty much the theme song for the series as a whole. ^note  if only due to the 1966 version being lost up til it was found in the 90s. This song was even used reused in the 2012 pachinko game.
• Ensemble Dark Horse:
  • Tougou, a One-Shot Character with a terrifying two-faced personality, became this for mid-2010s Japanese fans.
  • Back in the day, the original Darkhorses were Iyami and Chibita. They stole a lot of the scenes they were in, to the point where the focus started to shift to both of them.
• Fan Nickname: "The Hivemind"/"Hivematsus" for the Matsuno brothers. People coming from Osomatsu-san tend to call the brothers "Minimatsus" instead.
• Germans Love David Hasselhoff: Totoko's brother, despite suffering an early case of Chuck Cunningham Syndrome, became a popular minor character in English speaking countries around the mid 2010s.
• Harsher in Hindsight: Osomatsu makes constant references to wishing he was an only child, or, bar that, just the only kid in the house. In the What If? situations, his siblings lead somewhat miserable lives without him, and in one of them he ends up living alone and taking care of his ailing mother and is balding due to stress. And considering that in his early-mid twenties he secretly regards his bothers as Living Emotional Crutches, it's a wonder if he even means it half the time.
  • In a later chapter of the manga, Osomatsu actually ATTEMPTS to kill his brothers by messing with a hiking route map to get them trapped in a cave. Choromatsu fixes the mistake, and Osomatsu ends up isolated from his family for 40 years due to his oversight.
• Hilarious in Hindsight: The 1980s version of Kinko was shown to be fierce rivals with Totoko. Come the timeskip, not only does Totoko go head-to-head with Nyaa-chan the same way, but she actually becomes friends with a similarly named girl.
• Idiosyncratic Ship Naming: The brothers have been given platonic duo names by the fandom. Note that using any names other than those below may anger Japanese -Kun fans, especially if they are used for non-platonic depictions of the brothers' relationship:
  • Osomatsu/Choromatsu gets the name "Sokudo".^note "Hyper", referring to their high-energy antics together.
  • Jyushimatsu/Ichimatsu is called "Suuji".^note "Number", referring to their names meaning "14" and "1" respectively. This name was brought over to their depictions in -San as "Suujimatsu".
  • Karamatsu/Todomatsu is referred to as "Zaimoku". ^note "Lumber", referring to both of their names being words for trees.
• Incest Yay Shipping: While not to the extent of the 2015 sequel, Osomatsu/Choromatsu existed even before the sequel aired due to a good chunk of plots involving the brothers being started by the two of them. Some fans regard it now as 'The Original Ship', even complete with fanworks and doujins.
• Memetic Mutation:
  • Iyami's "Sheeeeh!" pose, to the point where even modern comedy anime use it as a stock shocked pose. Back in The '60s, everybody from Godzilla, John Lennon, to the current crown prince of Japan has been filmed or photographed doing the pose.
  • Choromatsu's "Anonee" face from "Osomatsu-kun in 40 Years".
  • "Is this Nobita?"/"Nobita is the seventh Matsu"— usually said by people who notice the two series' similar art styles and the strikingly similar main characters. Also counts under Hilarious in Hindsight, as Akatsuka and the Doraemon creators worked under the same roof at one point.
• Never Live It Down:
  • After seeing Choromatsu's much more responsible personality in Osomatsu-san, 21st century fans will never let go of the scene where he goes Drunk with Power and whips his brothers.
  • Nor will he live down kissing Tensai Bakabon 's Kaoru-chan for a whopping one and a half pages in one bonus chapter.
• Nightmare Fuel:
  • Everything Osomatsu had to go through in "The Terrifying Lodger". Just imagine being a kid and being forced to keep mum about your customer's shady habits because you're not quite sure what he'd do to you if you don't. And Togou appeared to be such a nice fellow, too...
  • Choromatsu going insane and stunting his growth after he thinks Osomatsu died in a cave in during "Osomatsu-kun in 40 Years".
• The Problem with Licensed Games: Osomatsu-kun: Hachamecha Gekijō is regarded as one of the most infamous Megadrive/Genesis games in the Japanese community. A confusing level design, awful controls, being ridiculously short once you figured it out the confusing design and being downgraded from its initial 4MB to 2MB were among some of the biggest problems, not to mention the game being Christmas rushed and overhyped, contributed to the infamy of this game.
  • There were even reports of the game crashing on the second and third levels on physical hardware, but with the consistently upgrading models for the Mega Drive, older games such as Osomatsu were unable to be played on newer models. No wonder the system did so poorly in its native country...
• Suspiciously Similar Song: One of the background music pieces used in several episodes of the 1966-67 series is a knock-off of "Sing, Sing, Sing (With a Swing)" by Benny Goodman.

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