Secondhand Bookstores Hit With Wave of Bulk Orders — “50 Tons of Japanese Books” Reportedly Exported to US for AI Training

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The story

Nippon TV News reporting has revealed that online secondhand bookstores across Japan have seen a wave of bulk orders since around August this year. Booksellers report selling “100 books a day” and, on some days, sales “five times the usual,” fueling speculation in the industry that buyers are collecting training data for generative AI. Follow-up reporting confirmed export records showing more than 50 tons of books shipped from Japan to the United States. On 5ch, users debated whether even handwritten cursive (kuzushiji) Japanese-bound books and rare volumes are being fed into AI training and then discarded, and puzzled over why physical secondhand books — rather than e-books — are being targeted.

Tue, 9/22, 10:30 AM

Nippon TV News NNN

Online secondhand bookstores across Japan have seen a wave of bulk orders since around August this year. Booksellers interviewed say they’re “selling 100 books a day” and that “sales were five times normal on some days,” fueling industry speculation that the goal is to gather training data for generative AI (artificial intelligence). Further investigation turned up export records showing more than 50 tons shipped from Japan to the United States. Is it acceptable for books to be consumed and discarded for AI training?

Source: topics.smt.docomo.ne.jp / Original article here

What people said

22AnonymousSep 22, 2026 11:47
And since they'll just get thrown away afterward, all these valuable old books keep disappearing one after another.
38AnonymousSep 22, 2026 11:51
Re: #22
That's probably true for printed type, but there's no way AI can handle Japanese-bound books written in flowing cursive script, right?
45AnonymousSep 22, 2026 11:53
Re: #38
I don't think it's impossible — you just need to train it on the patterns.
48AnonymousSep 22, 2026 11:54
Re: #38
Just give it a character-recognition app as a subroutine.
25AnonymousSep 22, 2026 11:49
Once this is all wrapped up, next they'll start harvesting data from humans. And once that happens, humans won't be needed anymore.
91AnonymousSep 22, 2026 12:06
Re: #25
Because they'll do everything — swap out screws, oil the parts, whatever it takes!
106AnonymousSep 22, 2026 12:09
Re: #25
This is already happening in China — it's called 'human distillation.' Feed an employee's entire email history into the AI, and it learns exactly what work they do and what instructions they give — then that person becomes unnecessary.
218AnonymousSep 22, 2026 12:28
Re: #25
I hope that world gets here soon. Humans aren't needed.
63AnonymousSep 22, 2026 11:59
Is this the Shiba Ryotaro legend? They say whenever he started a new book, every related title would vanish from the secondhand shops.
126AnonymousSep 22, 2026 12:14
Re: #63
Judging by the Shiba Ryotaro Memorial Museum, he did have a large personal library, but not quite to that extent — sounds like the story just kept getting exaggerated.
143AnonymousSep 22, 2026 12:16
Re: #63
Tengyu Shoten, maybe. That could be the same shop behind the '10,000-book inquiry' in western Japan too.
73AnonymousSep 22, 2026 12:01
Are there even any foreigners who can read classical Japanese, Chinese classics, and old historical documents?
75AnonymousSep 22, 2026 12:02
Re: #73
It's not a person doing the reading, remember.
109AnonymousSep 22, 2026 12:10
Re: #73
AI has already gotten pretty good at Japanese cursive script (kuzushiji). It'll probably end up surpassing human experts eventually.
80AnonymousSep 22, 2026 12:04
Why isn't Japan doing this itself? If we end up depending on America for everything — AI, potatoes, you name it — they'll literally hold our life and death in their hands.
89AnonymousSep 22, 2026 12:05
Re: #80
China's got its own AI too, so… need I say more.
101AnonymousSep 22, 2026 12:08
Re: #80
Honestly, this is exactly the kind of thing Japan should be doing — building its own AI and cataloguing and preserving this information itself. If they're going to waste 7.2 billion yen on PR campaigns, they should spend it on this instead.
93AnonymousSep 22, 2026 12:06
Can't they just train it on the complete historical stock price data?
104AnonymousSep 22, 2026 12:08
Re: #93
With stocks, past price movements aren't that useful as a reference anymore — AI itself has become one of the players moving the prices now, not just an observer of them.
110AnonymousSep 22, 2026 12:10
Re: #93
You mean quants. Financial engineering has a long history — Black Monday in 1987 and the repeated crashes since then are often blamed on quants. Forty years on and it's still like this — useless.
107AnonymousSep 22, 2026 12:10
AI can read books too? Do they attach some kind of page-turning machine to it?
113AnonymousSep 22, 2026 12:11
Re: #107
They cut the spine off and scan it. The disassembled book gets thrown away. There's suspicion that a lot of books — including rare ones — are being discarded this way, and it's becoming a real problem.
141AnonymousSep 22, 2026 12:16
Re: #107
These days there are scanners that turn pages without cutting the book apart. There are videos of them on YouTube.
150AnonymousSep 22, 2026 12:18
There's no need to buy the physical version in the first place — just buy the Kindle e-book. Are they dumb or something?
162AnonymousSep 22, 2026 12:20
Re: #150
Because some information gets stripped out when books are digitized.
198AnonymousSep 22, 2026 12:25
Re: #150
Apparently e-book terms of service prohibit using them for AI training… plus they're scooping up old books that were never digitized in the first place.
169AnonymousSep 22, 2026 12:21
Recent books are one thing, but surely they're not scanning and tossing out Edo-period or Meiji-era books too, are they?
175AnonymousSep 22, 2026 12:22
Re: #169
I think that's exactly the problem.
172AnonymousSep 22, 2026 12:21
If it means the world becomes more like Japan, I'm not against it.
206AnonymousSep 22, 2026 12:27
Re: #172
Start with abolishing the tipping system — that's where this conversation needs to begin.
216AnonymousSep 22, 2026 12:28
Re: #172
This isn't just Japan — it's happening worldwide.
199AnonymousSep 22, 2026 12:26
It's kind of shocking how Japanese-written finance and investment books are often nothing but summaries and quotes lifted from foreign books.
215AnonymousSep 22, 2026 12:28
Re: #199
Same with sociology books, isn't it? They take what's trendy overseas and use the language barrier to mark it up and sell it here.

Background and Key Points

The unauthorized scraping of online text and images to build generative AI training datasets has repeatedly sparked controversy across various countries. Physical secondhand books often have murky copyright status, whereas e-books are typically restricted from AI-training use under their terms of service — a distinction some thread posters pointed to when noting that buyers seem to be “scooping up secondhand books rather than digitized ones.” That said, this report rests only on booksellers’ testimony and export statistics; it has not been confirmed that the buyers are actually using the books for generative AI training. While the thread raised concern that even cursive-script (kuzushiji) materials and rare books might be cut apart and discarded, the article itself does not confirm the actual scale of disposal or exactly which books are involved — worth keeping in mind.

*This article is compiled and summarized from the 5ch (Breaking News+) thread “Mysterious Bulk Orders Hit Secondhand Bookstores… AI Training? Export Records Show ’50 Tons of Japanese Books’ Bound for the US.”

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