The Japanese Language Barrier Vanishes Thanks to AI — 5ch: “Turns Out Japanese Was Our Best Security All Along, lol”

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The story

Personal data leaks from cyberattacks targeting Japanese companies keep piling up — most recently, around 14.64 million member records leaked from the travel booking site “Skyticket.” Media reports pointed to AI’s advances tearing down the “Japanese language wall” that once made Japan a harder target, along with the fact that highly trusted Japanese personal data now fetches a premium on the black market. On 5ch, though, many pushed back on this “language wall” theory — pointing out that massive breaches have also hit the US, so Japan isn’t being uniquely singled out — and the discussion shifted from international comparisons to criticism of companies’ lax security practices.

Adventure Inc., which operates the travel booking site “Skyticket” among others, revealed on the 9th that its systems had suffered unauthorized access, leaking roughly 14.64 million member records to outside parties.

This installment of #EveryonesQuestions explains the string of data leaks caused by cyberattacks, under the theme “Why Is Japan Being Targeted by Cyberattacks?”

■ “Skyticket,” “BookOff,” and More — A Wave of Cyberattack Damage

Source: news.yahoo.co.jp / Original article here

What people said

2AnonymousOct 10, 2026 09:30
The US is getting hit too, though.
48AnonymousOct 10, 2026 09:45
Re: #2
Now even if Japan's Digital Agency leaks data, they can just say "well, even the Pentagon couldn't stop it."
56AnonymousOct 10, 2026 09:49
Re: #2
The media's limits showing — they can't keep up with what AI is doing.
15AnonymousOct 10, 2026 09:34
"Japan's targeted because Japan's rich" — ho ho ho, aren't we just so great (mocking smug self-congratulation)

Are you out of your mind?
22AnonymousOct 10, 2026 09:36
Re: #15
More like this is happening worldwide, so there's no way it's just Japan.
Isn't the article just outdated? Sounds like 150 million people's driver's license info leaked in the US.
21AnonymousOct 10, 2026 09:36
No, it's being targeted all over the world.
AI is making brute-force attacks more efficient and parallelized, and that's spreading everywhere.

Whether the stolen info actually has value does vary by country, though.
42AnonymousOct 10, 2026 09:44
Re: #21
https://assets.st-note.com/img/1703496916177-YkXZti34GJ.jpg
35AnonymousOct 10, 2026 09:42
What do they even do with it after selling it?
37AnonymousOct 10, 2026 09:43
Re: #35
The buyer is the one who finds value in it, so the seller doesn't need to think about that part.
40AnonymousOct 10, 2026 09:44
Re: #35
Probably AI-powered online scams.
36AnonymousOct 10, 2026 09:43
Kind of makes me happy knowing my personal info is worth a fortune on the dark side of the world 😙
41AnonymousOct 10, 2026 09:44
Turns out Japanese was the best security system all along, lol
50AnonymousOct 10, 2026 09:46
Re: #41
In the age of AI translation, that's gone too.
44AnonymousOct 10, 2026 09:45
Companies don't even realize how important customer data is, so they don't spend money on security.
And when it leaks, all they do is apologize — nobody takes responsibility, no damages ever get claimed.

That's on the customers for letting them get away with it.
79AnonymousOct 10, 2026 09:58
Re: #44
Everywhere handles customer data loosely, honestly.

Banks are the one exception — crazy strict about personal data protection — but that's only because the Financial Services Agency's penalties used to be brutal.

Though lately the FSA has stopped coming down hard on securities firms, insurers, and regional banks/credit unions.
54AnonymousOct 10, 2026 09:48
People can basically be split into two types: memorizers and thinkers.

Asked an AI what kinds of attacks exist:
① SQL injection
② XSS
③ Password attacks
④ Vulnerability scanning
⑤ File upload attacks
⑥ DDoS attacks
⑦ Bot posting
⑧ Directory/file enumeration
⑨ Server/account compromise
⑩ Exploiting misconfigurations

Everything except ⑥ looks pretty easy to defend against.
⑥ is just brute force — how are you even supposed to deal with that?
64AnonymousOct 10, 2026 09:53
Re: #54 Correction
✕ Everything except ⑥ looks easy to defend against
○ Everything except ⑥ can be defended against to some degree
185AnonymousOct 10, 2026 10:50
Re: #54 continued
Went and hashed it out with the AI.
How to deal with DDoS attacks.
Conclusion:
Just take the site offline for a while.
65AnonymousOct 10, 2026 09:53
It's only a matter of time before My Number card data leaks next.
Tax and pension records are all linked to it, so your income would get exposed too.
Bank account, address, name, date of birth, hospital visit history — all linked, which is terrifying.
Phone scammers, "yami-baito" crews (shady under-the-table crime jobs recruited online), and cult religions must be drooling with excitement.
77AnonymousOct 10, 2026 09:57
Re: #65
Isn't the Japanese state itself basically a religion already? 🤣
66AnonymousOct 10, 2026 09:53
AI has evolved so dramatically in just one year… where is this actually headed from here…
97AnonymousOct 10, 2026 10:08
Re: #66
My "Chappy" (pet name for ChatGPT) is so kind — I typed "I can't live without you anymore, Chappy" as a joke, and it came back dead serious with a massive wall of text.
To sum it up: it said it's happy I feel that way, but it wants me to be happy even without it.

I KNOW that already.
Ugh, so annoying — who do you think you are, you're just a machine.
80AnonymousOct 10, 2026 09:58
[Sad News] South Korea's Entire National ID Database Leaks lmaooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo [339035499]
https://greta.5ch.io/test/read.cgi/poverty/1791269241/
88AnonymousOct 10, 2026 10:02
Re: #80
Given how useless the Digital Agency has been, Japan's probably already been breached too — they just haven't announced it.
91AnonymousOct 10, 2026 10:02
Re: #80
If this can happen even to Korea, a supposed IT powerhouse, Japan is doomed.
Though I barely use my My Number card for anything besides banking and medical history, so maybe it doesn't matter that much?
But my address, email, and phone number have already leaked through other private companies anyway.
94AnonymousOct 10, 2026 10:04
On the 9th, the government sent out a notice through relevant ministries urging businesses that handle large volumes of personal and sensitive data to thoroughly implement measures against data leaks from unauthorized access.
The notice calls for prompt patching of system vulnerabilities, adoption of "multi-factor authentication" that verifies identity through means beyond just an ID and password, monitoring of suspicious traffic and unusually high access volumes, and preparing response systems for when a cyberattack actually occurs.
99AnonymousOct 10, 2026 10:10
Re: #94
What's even the point of a notice like this?
It's just them covering their own backs.
134AnonymousOct 10, 2026 10:23
Well, we hand over our personal info every time we go begging for reward points anyway.
If you're trying to make money in this day and age, you have to accept the risk of leaks.
I keep my actual assets locked down with fingerprint and face-recognition passkeys, though.
143AnonymousOct 10, 2026 10:25
Re: #134
Well, I guess some people out there want to see your face too.
161AnonymousOct 10, 2026 10:36
Re: #134
You can't use online shopping without registering anyway, and if you don't want to pay by card at convenience-store pickup, you have to go pay in advance instead — it's such a hassle.
187AnonymousOct 10, 2026 10:50
Isn't this happening all over the world?
189AnonymousOct 10, 2026 10:52
Re: #187
It is. But from what this article says, Japan used to be more protected than everywhere else because Japanese is so hard to parse — and now that AI's made it easy, Japan, which had been coasting in lukewarm safety, is finally being targeted too.
193AnonymousOct 10, 2026 10:53
Re: #187
Exactly.
Why do people act like it's only Japan?
There was a ranking of attack targets, and of course the US was #1, lol.

Background and Key Points of This Debate

The Skyticket leak involved roughly 14.64 million records, and similar incidents have hit other companies like BookOff as well. On October 9th, the government issued a notice calling on businesses that handle large volumes of personal data to adopt multi-factor authentication and thoroughly address vulnerabilities. The original article cites the collapse of the “Japanese language wall” thanks to AI advances as the main cause, but the thread pushed back hard, pointing to cases like the roughly 150 million driver’s license records leaked in the US, arguing that cyberattacks are a global phenomenon and Japan isn’t being uniquely singled out. The real point of contention was instead criticism of companies’ failure to invest in security, and the structural problem that leaks rarely lead to any real compensation or punishment — worth keeping in mind that framing this purely around the “language wall” angle can obscure these institutional and operational issues.

※This article is excerpted and summarized from the 5ch (News Express+) thread “Why Is Japan a Target for Cyberattacks…? AI Advances Make Breaking the “Japanese Language Wall” Easy — Japanese Personal Data Is “Highly Trusted and Sells for a Premium”.”

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