A thread on 5ch’s Hello! Project board reported that the term “Known-Content-Rumination Guy” — referring to “a middle-aged man who’s lost the stamina to digest new content and only touches stuff he’s already familiar with” — had started trending. Posters piled on with examples like remastered titles outselling new releases, and the feeling of being overwhelmed by the sheer volume of new manga volumes, while others pushed back, arguing it’s really a problem on the creators’ side, who can only churn out rehashes. The thread showed a clear split in tone: some embraced this return to nostalgia, while others saw it as a kind of age-based excuse-making.
What people said
1AnonymousOct 19, 2026 10:20
It refers to guys who've lost the stamina to digest new content, so they end up only touching stuff they're already familiar with.
4AnonymousOct 19, 2026 10:24
Given how remasters outsell new games these days, I'd say there are a lot of these guys around.
75AnonymousOct 19, 2026 11:25
Re: #4
That's a problem on the creators' side — they can't even manage a rehash as good as the remaster. Re: #1 too —
if "new content" is only new but not actually fun, then people who know the old classics won't accept it,
and if that's the case, it's a creator problem.
6AnonymousOct 19, 2026 10:26
Yeah, I barely go anywhere except Hello! Project stuff either.
8AnonymousOct 19, 2026 10:28
For me it's manga.
Every so often I think "alright, let's read some manga" and head to a bookstore, and I get overwhelmed by the sheer number of new releases.
On top of that, each series runs way too long with way too many volumes.
I know it'd probably be fun if I actually read it.
But picking it up feels like way too much effort.
So I just keep re-reading the same old Dokuro Bozu and Punk Ponk (old manga titles he already owns) forever.
9AnonymousOct 19, 2026 10:29
Honestly, the guy checking X trends on a Monday morning and excitedly starting a thread about it is pretty "that" himself, if you ask me.
10AnonymousOct 19, 2026 10:30
The last few days "Fishing Freak Sanpei" has been going viral, and the moment it did, creepy old guys lit up like fish back in water, going on and on about Takao Yaguchi — it's kind of hilarious.
"This is an era I can actually talk about!"
12AnonymousOct 19, 2026 10:32
Part of it is that picking up something new feels like too much effort, but part of it is also just feeling like you've already had enough.
13AnonymousOct 19, 2026 10:36
Hello! Project would've gone extinct without that.
14AnonymousOct 19, 2026 10:38
Plenty of Hello! Project fans despised even Buono!, you know — because it wasn't built around the "known" thing (Tsunku).
15AnonymousOct 19, 2026 10:41
I mean, content has always just been stuff to trick kids with, in every era.
People just keep clinging for life to whatever tricked them when they were kids.
There are just grown-up kids out there.
16AnonymousOct 19, 2026 10:41
Food's the same way.
Nothing new really whets your appetite.
17AnonymousOct 19, 2026 10:41
Is it really a matter of stamina or motivation, though?
18AnonymousOct 19, 2026 10:42
That's just how old folks are.
Not really a phenomenon that needs its own name.
19AnonymousOct 19, 2026 10:42
"Guy Living in the Past" fits better, if you ask me.
Maybe it's fine for us to just live in the past now.
We've got more past than we can even handle.
Let's just savor it slowly — that kind of vibe.
20AnonymousOct 19, 2026 10:44
I mean, that's just what happens when you become an adult.
Feeling nostalgia helps stabilize your mental state.
There's actually scientific backing for that, I think.
21AnonymousOct 19, 2026 10:44
On the flip side, I think it's genuinely impressive when middle-aged and older folks can still get hooked on whatever drama or movie is trending right now.
22AnonymousOct 19, 2026 10:44
So does someone who only listens to Hello! Project count as one of these guys?
23AnonymousOct 19, 2026 10:45
New releases aren't necessarily good anyway.
They're full of nothing but rehashes and watered-down versions.
24AnonymousOct 19, 2026 10:46
I bought some sriracha sauce the other day.
Ever bought any?
That was unknown content for me.
25AnonymousOct 19, 2026 10:47
To begin with, our generation doesn't read One Piece, and we look down on it, don't we.
26AnonymousOct 19, 2026 10:47
Story structures have all been done to death ages ago anyway.
Even stuff that looks new is essentially known content at its core.
27AnonymousOct 19, 2026 10:48
There's nothing more boring than content built off a "this formula sells" playbook.
28AnonymousOct 19, 2026 10:50
If it's a choice between going to Kawa-Labo and going K-pop, I'll take K-pop.
29AnonymousOct 19, 2026 10:51
I think people are just carrying on with whatever they felt during adolescence — stamina has nothing to do with it.
31AnonymousOct 19, 2026 10:55
There were always people who reread the same manga over and over since childhood.
That type has always existed — don't be an affi-kasu (slang insult for affiliate-blog-style posters) about it.
32AnonymousOct 19, 2026 10:56
Dopamine Kids vs. Known-Content Geezers
44AnonymousOct 19, 2026 11:03
Re: #32
That pretty much sums it up lol
33AnonymousOct 19, 2026 10:57
With anime too, there was plenty worth watching up through around 2015, but since then it's only a handful of shows a year that are actually worth watching.
34AnonymousOct 19, 2026 10:57
Does this guy think he's saying something new and interesting?
Is he planning to keep chasing whatever's trending with teens and twenty-somethings even once he's an old geezer himself?
35AnonymousOct 19, 2026 10:58
These guys get flak because they themselves think they're living in the present, not the past.
37AnonymousOct 19, 2026 10:59
There's probably discovery and genuine emotion to be found in rumination too, though.
38AnonymousOct 19, 2026 11:00
Gundam-and-Dragon-Ball Guy
39AnonymousOct 19, 2026 11:01
The Takao Yaguchi thing started from some foreigner's post on X, right?
I saw a post like "Hey, do you guys know Takao Yaguchi? His art is insane."
Then the Japanese old guys who saw it went chaotic, posting stuff like "Look at how he draws the water's surface!" and pulling up the manga about the Sankebetsu brown bear incident.
41AnonymousOct 19, 2026 11:02
Stuff like Doraemon or Crayon Shin-chan.
42AnonymousOct 19, 2026 11:02
There's a kind of nourishment you can only get from watching young people or foreigners encountering the original Gundam for the very first time.
43AnonymousOct 19, 2026 11:03
The shared assumption seems to be that it's fine to dump on "old guys" as much as you want.
57AnonymousOct 19, 2026 11:11
But when it comes to porn (AV), people are always hunting for new releases, aren't they?
60AnonymousOct 19, 2026 11:12
Re: #57
Nah, you're surprisingly just rotating through a handful of favorites anyway.
Background and Key Points of the Debate
The term “Known-Content-Rumination Guy” is itself a coinage that originated in this thread — there’s no official statistic or definition behind it. The backdrop includes the real-world fact that ports and remasters often outsell new releases, along with an oversupply problem where the sheer number of new manga and anime releases each year has become too much to keep up with. The thread split between two views: one framing this as “declining stamina and motivation,” and the other arguing that “creators themselves can only produce rehashes” — the latter view, which questions the quality of new releases themselves, drew fairly strong support. There was also a current of opinion affirming the act of returning to nostalgic favorites outright, pointing to the idea that nostalgia helps stabilize one’s mental state. What readers may easily misread is that none of this is based on any actual trend survey or poll — it’s purely a clash of gut feelings and personal theories within 5ch itself.
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