AI Is Crashing Kids’ Grades, Says Tokyo University Professor — 5ch: ‘Isn’t This Just the Old Manga-Ban Argument All Over Again?’

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The story

Kunie Sakai, a professor at the University of Tokyo’s Graduate School and a language neuroscientist, has reportedly argued in the December issue of Bungei Shunju that AI use in education “should be banned outright.” His reasoning: if children give up thinking in language by leaning on AI, it risks stunting the development of brain functions — including the grammar center — and he claims abnormalities are already showing up even in current Tokyo University students. On 5ch’s science news board, reactions split between posters sympathetic to the risk of AI dependence eroding critical thinking, and skeptics who doubted the causal link had been proven, with many noting the resemblance to past moral panics over manga and video games.

Leading language neuroscientist and Tokyo University professor Sakai sounds the alarm: “Ban young people’s AI use entirely” — “Kids’ academic ability is plummeting, and abnormalities are even showing up in current Tokyo University students…”

Something is shaking education to its very foundations.

Kunie Sakai, a language neuroscientist and professor at the University of Tokyo’s Graduate School of Arts and Sciences, has issued an urgent proposal in the December issue of Bungei Shunju (on sale November 10): AI use in educational settings “should be banned outright.”

Source: bunshun.jp / Original article here

What people said

2AnonymousNov 10, 2026 22:22
"Not thinking at all" is bad news.
Even grad students these days just dump AI's hallucinated garbage straight into their papers,
so I get why people are worried about younger kids picking up even worse habits.
3AnonymousNov 10, 2026 22:27
Behold his honorable face (forum slang for "here's a photo of the guy")
https://bunshun.ismcdn.jp/mwimgs/0/2/1500wm/img_023d0d6be58a6a4e69dcf16cea5b6afa150792.jpg
4AnonymousNov 10, 2026 22:58
If you use AI, the world's cutting edge becomes your starting line.
Anyone who can't even manage that
might as well get a lobotomy.
5AnonymousNov 10, 2026 23:25
You can use AI to get smarter, but you can also use it to cut corners and get dumber.

Left to their own devices, most people end up as the latter.
7AnonymousNov 10, 2026 23:32
As someone who's dabbled in cultural anthropology, I'm kind of curious whether kids raised entirely on AI will turn into "people from before writing was invented" lol.
The "voice of god" from the bicameral mind hypothesis, lol.
As long as you live by whatever AI-sama tells you, there's no problem at alllll~
10AnonymousNov 10, 2026 23:50
Re: #7
A regression to the state before Socrates' critique? (He famously warned that writing itself would weaken human memory — same argument, new technology.)
8AnonymousNov 10, 2026 23:38
Joking aside, I really think the best fix is building the habit of fact-checking what AI tells you — or making kids do it.
It comes up a lot in cooking talk: AI states something that's chemically wrong,
and when you ask for a source, it turns out to be some copy-paste site dressed up to look legit.
9AnonymousNov 10, 2026 23:43
Well, idiots who mistake AI's abilities for their own
exist everywhere,
no matter where you look.
11AnonymousNov 11, 2026 00:47
Kids not bringing notebooks or pens because they just photograph the blackboard with their phone — people have been saying that for ages already.
12AnonymousNov 11, 2026 00:49
Cameras mean kids never develop the ability to sketch things in the field.
It was never a needed skill to begin with, so no problem there.
Situations where you can't use a camera are so nonexistent it's almost absurd to even picture one.
13AnonymousNov 11, 2026 00:53
So it ends up being a convenient idiot-manufacturing machine for rulers who want to govern a dumbed-down populace?
14AnonymousNov 11, 2026 01:58
This is exactly the kind of setup you'd see in Showa-era sci-fi, isn't it?
Someone has a personal computer that advises them on everything, and when a system glitch cuts off the advice, they're left helpless, unable to do anything on their own.
15AnonymousNov 11, 2026 03:09
Well, I can't really talk big since I barely took notes even when I did bring them.
Apparently Socrates also said that taking notes makes you stupid,
but still, yeah, I do think this AI thing isn't great.
16AnonymousNov 11, 2026 03:55
So it's like one of those retired-bureaucrat guys ("amakudari" officials parachuted into cushy post-retirement jobs) whose actual skills atrophied from farming everything out to subcontractors?
17AnonymousNov 11, 2026 04:03
Work keeps throwing up new problems and the business keeps changing, so you can't stay lazy forever —
but compulsory education's the same every single year, so AI's probably already got it down perfectly, huh.
18AnonymousNov 11, 2026 05:18
Humanities-side brain scientists only ever say half-baked stuff anyway.
19AnonymousNov 11, 2026 05:38
Kraftwerk — "The Robots"

I'm your servant
I'm your worker
We're charging our battery
And now we're full of energy
We are the robots
We're functioning automatik
And we are dancing mechanik
We are the robots
I'm your servant
I'm your worker
We've just been programmed
to do
whatever you want us to
20AnonymousNov 11, 2026 06:35
We finally got to a point where we could cut corners, and this just means more fact-checking work instead.
Keep that up and AI ends up being something you can only use for harmless small talk.
21AnonymousNov 11, 2026 06:38
Kids who read Dazai Osamu and that sort of thing end up writing copycat prose and turning into pretentious literary wannabes,
so reading literary fiction should be banned for young people too.
Literary pretension — that's basically like catching the measles.
37AnonymousNov 11, 2026 18:36
Re: #21
Wouldn't it be fine if you could actually pull off imitating Dazai well?
That stuff's easy once you've got reading comprehension — without it, it just comes across as needlessly convoluted.
22AnonymousNov 11, 2026 08:00
That's rough.
The correlation between declining reading comprehension and AI is a logical leap, and the rest is just assumption with zero evidence.
Maybe it's professor quality that's declining here, if this is coming from a Tokyo University professor?
23AnonymousNov 11, 2026 08:21
The Reiwa-era "Drive to Eliminate Harmful Books" (a nod to the 1950s anti-manga panic campaign)

Let's get Reiwa White Postboxes (the real bins once used to collect "harmful" manga for disposal — now repurposed for "harmful apps") set up in front of train stations.
24AnonymousNov 11, 2026 08:22
Forget AI — kids probably shouldn't be using PCs or smartphones at all during their growth years.
For people with disabilities they're a necessary tool, but if you've got full use of your body, handwriting and paper books are what actually stick with you.
25AnonymousNov 11, 2026 08:56
Manga and anime, then games after that —
"it'll make kids dumb, it'll push them into crime, so keep them away" — that's the kind of half-baked stuff "experts" have been peddling on daytime TV forever.
This guy's probably just more of the same breed.
27AnonymousNov 11, 2026 09:52
I mean, the skills involved are just different.
Using AI, mimicking what AI says — sure, you build that particular skill.

But organizing information with notebook and pencil trains you up through: organizing information yourself → explaining it to others based on that → the ability to revise it.

Use AI well and you can even push past human cognitive limits in that area — but lean on it too hard and… there's a real risk it just never develops.
28AnonymousNov 11, 2026 10:42
Maybe we'll start seeing "thinking gyms," like sports gyms.
30AnonymousNov 11, 2026 13:18
I don't think today's so-called "digital natives," who get treated like they're something amazing, are actually that impressive.
They're just smartphone addicts. Whatever they can do is well within the range you'd expect.
But AI natives are going to be different.
35AnonymousNov 11, 2026 18:16
What's wild is that it never occurs to him to just teach kids how to use AI properly.
At least understand deduction and induction first.
Before banning AI use, go ban dictionary use while you're at it.
36AnonymousNov 11, 2026 18:26
Sounds like a sensible teacher. AI is a tool you pick up after you've already built basic thinking and judgment skills — not before.
38AnonymousNov 11, 2026 18:39
"The answer's always written in the textbook" —
so we're just going to get more idiots like those economists, huh.
39AnonymousNov 11, 2026 18:42
It'll be genuinely interesting to see what happens to someone who relies on AI from birth all the way to adulthood.
40AnonymousNov 11, 2026 18:53
">'Giving up on thinking in language by relying on AI will impede the development of innate brain functions, starting with the grammar center. It may be each adult's own responsibility if they use AI after having trained their brain in a pre-AI era — but encouraging children and students still in their developmental years, from elementary school all the way through university, to make use of it is tantamount to a reckless human experiment.'

That's probably the real point he's making.
Europe's been in the news over restricting mobile devices in elementary, middle, and high schools —
I wonder if AI's going to start generating that same kind of news eventually too.

Background and key points of this debate

Kunie Sakai is a language neuroscientist known for his research on the brain’s grammar center, and this proposal was published not in an academic journal but as a magazine contribution to Bungei Shunju. Where the thread split was over one specific point: whether a causal link between AI dependence and actual academic decline has ever actually been established. Supporters pointed to real cases of current students using AI output without checking it, while skeptics argued the structure is identical to past moral panics claiming manga or video games “corrupt” children. One thing readers can easily miss is that the proposal targets use in educational settings from elementary school through university — it doesn’t reject AI use by working adults themselves, so it’s worth keeping in mind that this is an age-bracketed argument, as the article itself frames it. The comparison to Europe’s ongoing restrictions on mobile devices in schools also hints that AI regulation could end up following a similar trajectory.

※This article excerpts and summarizes the 5ch (Science News+) thread “[Proposal] Leading Language Neuroscientist Sounds the Alarm: “Ban Young People’s AI Use Entirely”.”

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