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The story
Daiichikosho, which operates the “Big Echo” karaoke chain and “Karaoke DAM,” announced that approximately 8,724,000 pieces of personal information belonging to customers and employees — including names, gender, birth dates, and phone numbers — may have been leaked. On 5ch, users expressed shock at the sheer volume of personal data the company had accumulated over the years, raised concerns that the leaked data could be cross-referenced with previously leaked information to build highly accurate personal profiles, and speculated that the breach came through a cloud service. In response to calls for consolidating personal data under the My Number system, others pushed back, warning that such centralization would only amplify the risk, leaving opinions split on the right way forward.
“Karaoke Big Echo” Operator Daiichikosho May Have Leaked Roughly 8.72 Million Pieces of Personal Information — Names, Birth Dates, Phone Numbers of Customers and Employees
Daiichikosho, which operates “Karaoke Big Echo” and related chains, announced that approximately 8.72 million pieces of personal information, including customers’ phone numbers, may have been leaked.
According to Daiichikosho, the personal information that may have been leaked includes the names, gender, birth dates, and phone numbers of customers and employees of “Karaoke Big Echo” and related services — roughly 8,724,000 records in total.
Source: newsdig.tbs.co.jp / Original article here
What people said
And then it all gets cross-linked and leaked together…
Meanwhile I'm 56 and singing Lycoris Recoil and A Certain Scientific Railgun openings…
Yeah, they've had people filling out that info since the early days.
Guess they just held onto it like a treasure all this time.
And plenty of companies out there that couldn't even tell if it happened to them
Speaking of fake info, I wonder if the people who put down Disneyland or the Imperial Palace as their official registered address end up coming out on top?
Just put down the local police station's number or the Digital Agency's lol
The timing on that opening line is brutal, right?
People are kind of getting fooled by that one, honestly. It's actually pretty far from natural sea salt — if anything it's closer to plain table salt.
Singing itself is the fun part. It's not about having anyone else listen — it's stress relief. Time flies by when you're singing.
It's also fun working out ways to practice so you can rack up a high score.
It helps you lose weight! Dead serious.
AI doesn't hesitate. It instantly sorts through a pile of compiled personal data and figures out exactly whose info fits which role or scam. What takes a human forever, AI assigns in an instant — and scammers are the ones putting it to use.
Signing up gets you a pretty solid discount. Though I used a fake name when I did it.
Probably my personal info got built up the same way — for some reason it keeps gravitating toward my spam-trap email address, no idea why. By the way, I'm on docomo.
If a 'Gorilla-larity' (a joking pun on AI 'singularity') ever hits, we're done for.
That's not what happened here lol. A device got compromised — this just looks like a plain old security leak, re Re: #1.
Re: #174
The whole banking system has national-level countermeasures in place, so it's fine. Even if something slips through, they can probably just roll it back to the previous day.
I recommend leaving voicemail on permanently: 'We were unable to deliver your package. Please press 1 for inquiries.'
If you press 1, you'll probably get patched straight through to a 'tokuryu' crime ring lol (tokuryu = the loosely organized, anonymously recruited crime gangs that have become common in Japan)
Nah, that's not it. We've known IT has had a staffing shortage for like 20 years now — there were just a ton of companies faking it as IT companies without the chops.
I don't think personal data is actually the main target here. Normally an attacker would be demanding ransom from the company, but there's no sign of that. My guess is they're currently using this to train AI, aiming to eventually break into banks, infrastructure, and other targets that would deal a major blow to the country.
It's not gonna run wild lol. Unplug it and it stops working. Splash water on it and it's dead.
Background and Key Points of This Discussion
The leaked names, birth dates, phone numbers, and other data were apparently collected independently by the company itself during member registration, separate from the My Number system — so the thread’s suggestion to “consolidate everything under My Number” is actually a separate issue from this incident, where the real problem is that a private company was the one holding and managing the data. If anything, consolidating information into a single system could be criticized for widening the blast radius of any single breach. The technique mentioned in the thread — cross-referencing leaked data with other leaked datasets to build a highly accurate personal information list — is a real, well-known method, and has reportedly been used to pick targets for specialized fraud schemes based on phone numbers or email addresses. The article does not clarify whether the breach originated in the company’s own systems or in a contracted cloud service, so further investigation results are awaited. The scale of 8.72 million records speaks to just how large the company’s membership base has grown over its many years in business.
*This article is excerpted and summarized from the 5ch (Breaking News+) thread “[Breaking] Karaoke DAM “Big Echo” Operator Daiichikosho Hit by Cyberattack, Roughly 8.72 Million Personal Records Possibly Leaked.”


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