“We Can’t Give an Exact Restart Date”: Comic Cmoa Remains Shut Down After Hack, No Timeline for Return

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The story

Digital comic site “Comic Cmoa” has been suspended since the 15th after a third party’s unauthorized access leaked some members’ account information, and as of the 18th there is still no sign of when the service will resume. On the forum, users voiced surprise that the service belongs to the NTT DoCoMo group, expressed distrust over whether credit card data was also leaked, and discussed the risk unique to e-books — that purchased comics vanish entirely once a service shuts down. The same day, e-book rental service “Renta!” also announced emergency maintenance, adding to anxiety about the industry as a whole.

Sun, Oct 18, 21:07 JST

Oricon

Digital comic site “Comic Cmoa,” currently suspended, reported on the 18th that there is still no timeline for resuming service. The site has been temporarily halted since the 15th after a third party’s unauthorized access leaked some members’ account information.

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

What people said

3AnonymousOct 19, 2026 06:25
A service that never streamed any manga worth reading
167AnonymousOct 19, 2026 07:54
Re: #3
This one isn't tied to a publisher, so my impression was it broadly collected and streamed popular titles across the board.
There are way too many manga distributors like this, making it hard to tell them apart, but this one didn't have any particularly good points or particularly bad ones.
8AnonymousOct 19, 2026 06:27
I've heard the name a lot, but did it actually have any big hit titles?
30AnonymousOct 19, 2026 06:35
Re: #8
It's not a publisher-affiliated service, just a plain e-book shop.
14AnonymousOct 19, 2026 06:28
Comic Cmoa is a subsidiary of almighty NTT, right?
If even their security can get breached, there's nothing anyone can do.
22AnonymousOct 19, 2026 06:31
Re: #14
Ah, so that's why it was a reward in the point service for Flets broadband subscribers.
173AnonymousOct 19, 2026 07:55
Re: #14
NTT-related breaches have already happened so many times… lol
182AnonymousOct 19, 2026 08:03
Re: #14
That "almighty" (tenka) you mean is actually "amakudari" — retired bureaucrats parachuting into cushy corporate jobs.
17AnonymousOct 19, 2026 06:30
I really hope eBookJapan at least stays unaffected.
For us reading addicts, losing our e-books would be unbearable.
25AnonymousOct 19, 2026 06:32
Re: #17
Here, try "the library."
Being a reading addict is, in a way, going to be the most sustainable habit going forward.
37AnonymousOct 19, 2026 06:38
Re: #17
I was about to get rid of a huge pile of books recently, but decided to keep them for the coming dystopia.
Relying too much on digital might screw you over.
31AnonymousOct 19, 2026 06:37
Unauthorized access breaches have become routine now.
And yet, myself included, people seem way too unconcerned about it.
We're at the point where you'd almost want to cancel every credit card you own, but that's just not realistic.
35AnonymousOct 19, 2026 06:38
Re: #31
It's past the point of alarm — we've reached a state of resignation.
47AnonymousOct 19, 2026 06:41
What happens when the service ends ("sa-shuu")?
There have apparently also been cases of migrating your library to another company's service.
129AnonymousOct 19, 2026 07:32
Re: #47
Sukima was brutal.
Shut down completely after just six months.
If you didn't migrate in that window, all your data got wiped.
I never bought a single volume there myself,
but I saw victims posting about it online.
E-books are way too expensive given how weak your rights actually are.
133AnonymousOct 19, 2026 07:36
Re: #129
You'd get it if you'd ever been through a service shutdown even once.
E-books are basically just rental books.
135AnonymousOct 19, 2026 07:38
Re: #129
I had stuff on Mibon or something, left it sitting there, and it all went poof.
I was only in it for the points anyway, so whatever.
87AnonymousOct 19, 2026 06:59
I'm pretty sure the most popular ones are Piccoma and LINE Manga.
Splitting a single chapter into tiny pieces to hook you into logging in every day for your dopamine fix is apparently the manga site industry's biggest success formula.
These days the main users in Japan are basically people living with a slave-like mindset — though the user base is said to range from teens to fifty-somethings.
91AnonymousOct 19, 2026 07:04
Re: #87
Is that scheme of splitting chapter 1 into ep. 1-1, 1-2, 1-3, each just a few pages, actually popular with people?
189AnonymousOct 19, 2026 08:07
Re: #87
Seriously?
I'm both an e-book guy and a full-volume guy — is it actually fun reading it chopped up into fragments like that?
149AnonymousOct 19, 2026 07:46
With this kind of e-book, you're only ever buying the right to read it, so when the service ends, everything just disappears.
151AnonymousOct 19, 2026 07:48
Re: #149
I feel like they should just let us download the data.
152AnonymousOct 19, 2026 07:48
Re: #149
I think some services do let you download it.
166AnonymousOct 19, 2026 07:54
The thing is, when a service shuts down, every manga you bought just vanishes.
Paying into this kind of service is nothing but risk.
174AnonymousOct 19, 2026 07:57
Re: #166
For anything you genuinely want to read or keep on hand, buy the physical paperback.
That's the iron rule.
183AnonymousOct 19, 2026 08:04
Re: #166
Maybe just think of it as buying a memory, not an object.
194AnonymousOct 19, 2026 08:09
Renta's notice
It's already been a full day since the notice went up.
↓


Thank you very much for your continued use of Renta!.

Due to emergency server maintenance, the service is currently temporarily suspended.

For rental titles you were unable to view during the maintenance period, we will consider separate arrangements.

We are currently working toward restoring the service, so we ask for your patience before using it again.
We sincerely apologize for the significant inconvenience and trouble this has caused our customers.
205AnonymousOct 19, 2026 08:13
Re: #194
I've been using Renta for a long time and log in every day, but this is the first time I've ever seen it go into maintenance.
206AnonymousOct 19, 2026 08:14
Re: #194
Renta's probably been hit by a server attack too.
That's rough. I'd hate it if, when picking a story back up, you had to start over from the beginning or several volumes back — a full service shutdown is the one thing I really want them to avoid.
211AnonymousOct 19, 2026 08:16
Re: #194
Oh no.
If you can't read on the e-book service you were using, you're not going to just hop to a different e-book service — you end up thinking "guess I'll buy the physical book" instead.
Though I guess a lot of people already buy the physical copy and just use the e-book version for reading on the go?
If so, maybe it won't hurt physical sales all that much.
196AnonymousOct 19, 2026 08:09
They say credit card info wasn't leaked, but I can't help thinking, "is that really true?"
202AnonymousOct 19, 2026 08:12
Re: #196
They never said it wasn't leaked.
They only said it hasn't been confirmed as of now.
210AnonymousOct 19, 2026 08:16
Re: #196
Some travel booking site had everything leaked — personal info, credit card numbers, even the security codes.
At this point there's no option left but for each person to cancel their own card.
218AnonymousOct 19, 2026 08:23
Re: #196
It seems like the trend now is to hand payment processing off to major services and avoid holding that data yourself as much as possible, so that's a small silver lining in all this.

Background and key points of this discussion

E-books are often sold as a license to use rather than an outright “purchase,” which creates a structural risk: when a service shuts down or stays offline for a long stretch, your entire library can simply vanish. The “Sukima” case mentioned in the thread is one such example — it closed just six months after launch, and anyone who didn’t migrate their library in time had their data wiped, a concern that keeps resurfacing in cases like this. This latest statement said that “no leak of credit card information has been confirmed as of now” — worth noting that this is not the same as a flat denial that a leak occurred, a distinction that’s easy to miss. The same day, e-book rental service “Renta!” also announced emergency maintenance; while the cause hasn’t been disclosed, it added to growing unease about the security posture of the e-book industry as a whole.

*This article is excerpted and summarized from the 5ch (News Speed+) thread “[Unauthorized Access] ‘Comic Cmoa’ Service Resumption Still Unclear: ‘It Is Difficult to Provide an Exact Restart Date’“.

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