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The story
According to a report by ASCII.jp, roughly 77 million email addresses have leaked from “Arara,” a company that runs an email-delivery service for businesses. About 380 companies use the service to send emails to their own customers, which means many consumers had their data entrusted to a name they never even knew. Early posts in the 5ch thread leaned on wordplay around the company’s quirky-sounding name, but the discussion later turned substantive — covering the scale of the leak, corporate accountability, and how data-protection systems overseas differ from Japan’s.
ASCII.jp: Arara — Roughly 77 Million Email Addresses Leaked
By G. Raymond ・ Edited by ASCII
Updated November 2, 2026, 12:10 PM
Source: ascii.jp / Original article here
What people said
That one's French — "ooh là là" ("ウララ")
Lol, someone else was worried about the exact same thing as me
Relax, 5ch still gets SOUL'd OUT references
Diggy-MO' (SOUL'd OUT member)
Arara sure is a clever one
A tool-using 'Alalā (Hawaiian crow)
https://www.youtube.com/watch?v=qhk-lrcVjMQ&t=1s
Wrong link, sorry
A tool-using 'Alalā (Hawaiian crow)
https://www.youtube.com/watch?v=-oSd_G3epW0
What's more shocking is that something like that has 77 million members
> A service companies use to send emails to customers and such
So if you've signed up with any of those roughly 380 companies, there's a chance they've been using this without you even knowing
Everyone in this thread's just grinning about it lol
Meanwhile in Korea, China, and the US, way bigger leaks have been happening nonstop since last year lol
Speaking of the US specifically, since it's such a huge mail-order/e-commerce market, you can file a report with the credit bureaus and get fraudulent use shut down pretty easily, so misuse is arguably rarer there
File a report with a credit bureau that your info leaked → your credit review gets frozen
→ even if someone tries to open a credit card with the leaked info, it gets blocked with a "pending fraud alert" notice
Guess that makes me trash to society…
That's because companies figure "eh, a leak's fine" lol
And the law practically backs them up on that, so even more reason not to bother
Gohan Desu Yo!
Isojiman
Which one do you guys like? (brands of seasoned nori paste for rice)
There's a bunch of them, huh
Which one would you recommend?
And if AI's autonomy keeps growing, there's even a chance it starts turning on the hackers themselves
It's all so chaotic, where's this even headed
Wouldn't be surprising if some AI showed up that swallows up and wipes out every other AI
Nobody cares about some random pebble lying on the ground, right
If every single person's personal info in the world were freely accessible to anyone, personal info would lose all its value
That only holds up if "the information carries the same weight regardless of source"
Personal info stolen from a luxury watch shop is worth way more than info stolen from a local supermarket
It won't lose its value unless every single Japanese person is shopping at luxury watch stores every year
When it comes to tsukudani (seasoned seaweed) to go with rice, this is the one
77 million people is basically everyone except the elderly and little kids 🤮🤮
That's 77 million cumulative entries, not unique people
I really hope it's not out there with IPs attached
So address, name, phone number, and 5ch posts all get leaked together? 🥴
I wonder if it's the places smugly assuming "we're fine" that end up getting targeted
There's plenty that never even makes the news, so it's probably leaking every hour, not just every day
If that many people are using it, you'd think it'd be pretty well-known
Ob-la-di, ob-la-da
Life goes on, bra
Ara-la-la, la-la-la (riffing on the Beatles song)
Yeah, nobody knows about the outsourcing vendor behind the scenes
Probably never even told about it in the first place
Background and Key Points of the Discussion
The leak happened at a behind-the-scenes infrastructure service that companies outsource their email delivery to — which is exactly why consumers had their data entrusted to a name they’d never consciously signed up with. That’s also why “never even heard of it” was such a common reaction in the thread: it’s simply the nature of a B2B service. As for the 77 million figure, as commenter #203 pointed out, it’s a cumulative count — if one person is registered through multiple companies that all use this service, the same email address gets counted more than once, so the actual number of people affected may be smaller. Commenter #142 also pointed out that in the US, there’s a system for halting fraudulent use after the fact by filing a report with the credit bureaus, offering a glimpse at how post-leak damage-control measures differ between the US and Japan. Across the thread, you could feel a mix of weary “used to it by now” resignation and genuine unease — a sentiment that’s grown all too familiar amid the steady drumbeat of personal-data-leak reports.
*This article is compiled from excerpts and a summary of the 5ch (News Flash+) thread “Arara, Roughly 77 Million Email Addresses Leaked.”
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