Personal Data of a Cumulative 260 Million People Leaked: Government Launches Special Cyber Response Website

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The story

Amid a string of personal data breaches from cyberattacks, the Japanese government set up a “Special Cyber Response Website” on October 30, consolidating consultation hotlines and advisory information. News reports put the scale of the leaks at a cumulative 260 million people — a figure that exceeds Japan’s entire population and quickly took on a life of its own. On 5ch, the thread was dominated by posts questioning what that number actually means, technical discussion of why unauthorized access incidents are surging, and comments expressing confusion over what the Digital Agency is actually doing — with many users openly doubting whether the government’s cyber response is effective at all.

Government Launches “Special Cyber Response Website”

10/30 (Fri) 12:48 — TV Asahi (ANN)

Amid a series of information leaks caused by cyberattacks, the government set up a “Special Cyber Response Website” on the 30th, compiling consultation hotlines for victims and advisory information.

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

What people said

4AnonymousOct 30, 2026 17:28
It's like a bargain sale on personal info at this point.
17AnonymousOct 30, 2026 17:31
Re: #4-13
GMO and the Takaichi administration (six months ago)

https://gmo.connpass.com/event/383158/

What were these guys even doing?
99AnonymousOct 30, 2026 17:55
Re: #17 The historical connection between GMO and "Dial Q2"

GMO Internet Group's predecessor, "Voice Media," was a voice information service company founded in 1991 by Masatoshi Kumagai, the company's founder.

Asahi Shimbun
How Dial Q2 was used and adapted:
Kumagai reportedly adapted the mechanism behind NTT's paid voice information service "Dial Q2" (a system that billed information fees together with the phone bill), developing and selling his own teleconferencing equipment to grow the business.
6AnonymousOct 30, 2026 17:28
Japan doesn't even have that many people, right?
Does that mean 140 million of those are foreigners?
123AnonymousOct 30, 2026 18:05
Re: #6
It's probably the same person's data leaking from multiple places.
15AnonymousOct 30, 2026 17:31
I wish personal info would just lose all its value from being leaked so much that nobody wants to buy it anymore.
18AnonymousOct 30, 2026 17:31
Re: #15
Active email addresses and phone numbers were always the most valuable part anyway.
21AnonymousOct 30, 2026 17:32
I'm the one who had the My Number system developed.
https://imgur.com/kgnCq1c.jpeg
41AnonymousOct 30, 2026 17:40
If the total leak count is 260 million people, that's the same as 520 million eyeballs (a nod to Japan's old tourism slogan about "the eyes of 120 million people").
48AnonymousOct 30, 2026 17:43
Re: #41
So that's more than two rounds of 240 million eyes — meaning it beats "Exotic Japan" x2, huh?
54AnonymousOct 30, 2026 17:45
Let's just give up and go back to the Showa era. Cut off all digital communication, do everything on paper!
Going back to a slow life for a while wouldn't be so bad lol.
58AnonymousOct 30, 2026 17:45
Re: #54
Not being able to see you guys would be rough though.
225AnonymousOct 30, 2026 18:51
Re: #54
Being cumbersome and only able to handle small amounts is both a drawback and an advantage.
It's basically the same as "if you can't drive safely, don't speed."
72AnonymousOct 30, 2026 17:47
Sanae Takaichi: "Make it look like we're doing something!"

Don't embarrass me!
https://imgur.com/VNh0M0v.jpeg
91AnonymousOct 30, 2026 17:52
If hackers threatened to publish lawmakers' naturalization history, I bet the government would get serious about countermeasures real fast.
101AnonymousOct 30, 2026 17:55
Re: #91
Throw in the media executives' too, please.
102AnonymousOct 30, 2026 17:55
Re: #96
Anyway, I have no idea what route or purpose would lead Chinese tourists all the way out there.
112AnonymousOct 30, 2026 18:01
Re: #102
There's a new direct flight from Taiwan to Aomori, and Aomori Prefecture has been actively courting Taiwanese tourists.
104AnonymousOct 30, 2026 17:56
Seriously though,
the Digital Agency's presence is basically invisible lol lol lol
What are those guys even doing?
114AnonymousOct 30, 2026 18:01
Re: #104
Isn't the Digital Agency basically unrelated to this?
130AnonymousOct 30, 2026 18:08
Re: #114
It's unrelated? What does the Digital Agency even do on a normal day?
132AnonymousOct 30, 2026 18:09
Re: #114
If the average citizen heard "the Digital Agency has nothing to do with this," they'd probably lose it.

By the way, I looked up Wikipedia just now for why the Digital Agency even exists and read its founding purpose, and I honestly have no idea what it was established to do.

It says things like:
"Planning, drafting, and overall coordination of basic policies regarding measures for forming a digital society"
"Digitalization of the whole country"
"Participating as one member involved in digital infrastructure development within the 'Digital Administrative and Fiscal Reform Council,' which considers sustainable social development going forward"
"Securing and developing digital talent" / "1. Providing public services friendly to citizens, businesses, and staff" / "2. Promoting growth strategy through digital infrastructure development" / "3. Realizing safe, secure, and resilient digital infrastructure"
"Building public and private infrastructure for the digital age all at once"
"Our mission is: 'A people-friendly digitalization where no one is left behind.'"

That's what it says. So what do they actually do?
119AnonymousOct 30, 2026 18:03
Why has unauthorized access been so abnormally frequent lately?
127AnonymousOct 30, 2026 18:06
Re: #119
You didn't know? Up until now, security holes that allow unauthorized access had to be found by humans — but now AI can find them too. And way faster than humans ever could.
129AnonymousOct 30, 2026 18:07
Re: #119
Back in the day, you could start a moped's engine just by sticking scissors in and turning it, right? This is basically the digital version of that — same old story, just updated.
134AnonymousOct 30, 2026 18:11
At this point so much has leaked that even the people collecting the data probably don't know what to do with it anymore. They can't even tell if a given person is a gullible mark worth scamming. And if there are multiple records from moves, number changes, fake-name registrations, etc., they can't tell which one is accurate, so they can't even properly match up records to a single person.
148AnonymousOct 30, 2026 18:18
Re: #134
Honestly, the old phone books were probably worth more, unless we're talking bank account or credit card info.
155AnonymousOct 30, 2026 18:20
Re: #134
I recall hearing somewhere that the Soviet secret police did so much wiretapping that they drowned in their own flood of information and it backfired on them. Well, apparently China is using — or rather, abusing — AI to suppress free speech, so they might actually pull something off with this. Can't really let our guard down.
188AnonymousOct 30, 2026 18:36
At this rate, personal data leaks become so routine that ransom crimes holding personal info hostage stop working. Hackers move on to the next stage of crime: using stolen info to log in illegally and make money. Wonder what's next.
193AnonymousOct 30, 2026 18:38
Re: #188
That stage has already begun — hijacking the business's own systems outright, like with GMO.
198AnonymousOct 30, 2026 18:40
Re: #193
Since 2019 it's been prosecuted and the report has sat on the National Police Agency Commissioner's desk.
With the 2025 dollar system it was prosecuted and proven, and there are responses from the Ministry of Health, Labour and Welfare and the Imperial Household Agency too.

You guys are into some real masochistic stuff lol
204AnonymousOct 30, 2026 18:42
Re: #193
In GMO's case, isn't it actually GMO itself that's freezing customers' money by keeping their PCs powered off, rather than the hackers? The hackers haven't actually stolen any customer money. That weird hacker pride of "we only target the company, not individuals" is probably going to break down — and then individuals will start getting targeted directly.
199AnonymousOct 30, 2026 18:40
Digital Minister Furukawa:

"Please protect your own information yourself."
201AnonymousOct 30, 2026 18:41
Re: #199
Nothing but despair.
213AnonymousOct 30, 2026 18:45
Re: #199
Come on, Furukawa, say something too — allocate like a trillion yen to security already. Quit dumping money into pointless old-fashioned military spending and get the government moving on actual security defense for real.

Background and Key Points of This Topic

The figure “a cumulative 260 million people” is easy to misread, since it far exceeds Japan’s total population (roughly 120 million). “Cumulative” means the total counts overlapping leaks — i.e., the same person’s data being leaked by multiple different companies gets counted each time — so it doesn’t mean 260 million distinct individuals were actually affected. This same misunderstanding surfaced in the thread, and was resolved when reply #123 pointed out that “it’s probably the same person’s data leaking from multiple places.” Another recurring point in the thread is the role of the Digital Agency. Even quoting its official founding mission, posters said they still couldn’t tell what the agency actually does, reflecting a broader sense that the public isn’t being clearly told who’s actually responsible for handling cyberattacks. One cited factor behind the rising number of incidents is that attackers are now using AI to find vulnerabilities faster than human researchers can.

※This article is compiled as an excerpt and summary of the 5ch (News Flash+) thread “Government Launches “Special Cyber Response Website”… Personal Data of a Cumulative 260 Million People Leaked via Unauthorized Access“.

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