Nippan Confirms Book Sales to Anthropic — Japan's Publishers Enter Project Panama Fight
According to people familiar with a letter to the Japan Book Publishers Association, Nippan Group confirmed its overseas unit Nippan IPS signed a deal with Anthropic in November 2024 and sold it books from December 2024 to December 2025. Nippan said the unit asked about purpose but was not aware the purchases were for AI training; volumes and amounts were undisclosed. An internal Anthropic document in a US lawsuit lists 'Nippan Japan' under Project Panama. No Anthropic comment was found in the wire reports. Buying books is lawful; the dispute is about publishers' consent and use.
Anthropic's buy-and-scan approach to training data has so far been fought in US courts. A Japanese wholesaler's letter now brings that fight to one of the world's most organised publisher lobbies — just as Anthropic prepares for its IPO.
According to people familiar with the letter, Nippan Group Holdings, a major Japanese book wholesaler, confirmed to the Japan Book Publishers Association that its subsidiary Nippan IPS, which sells Japanese books overseas, signed a deal with Anthropic in November 2024 and sold it books from December 2024 to December 2025, Jiji Press reported (via Nippon.com). Nippan said the unit asked what the purchases were for but was not aware they were for AI training, and it did not disclose how many books were sold or the total amount. The association shared the letter with about 380 member publishers.
Project Panama link
An internal Anthropic document disclosed in a US lawsuit shows a deal with "Nippan Japan" as part of Project Panama, which aims to scan books from around the world, Jiji reports.
Kyodo News, citing an industry source, describes the sales as "a large number of books" and reports concern in the industry that the books may have been destroyed after their spines were cut for scanning. That destruction claim is industry concern as relayed by Kyodo, not an established finding. The association's September 17 letter asked whether member publishers' titles were included and how Nippan views selling large quantities abroad without publishers' permission.
Consent, not the purchase itself
Nothing has been filed in Japan on these facts as reported. Buying physical books is not itself unlawful; the live dispute is about publishers' consent and downstream use for training. Neither Jiji nor Kyodo carried an Anthropic comment, and none was found for this brief. Context on Anthropic's listing track: IPO prospectus, IPO marketing mid-November.
Limits
- Relies on unnamed industry sources describing Nippan's letter (Jiji and Kyodo).
- Volumes and dollar amounts undisclosed.
- No Anthropic comment in the inspected wires.
- Kyodo's "destroyed after spines cut" = attributed industry concern, not a finding.
- Buying books is lawful; dispute is consent and use.
Sources
- Jiji Press via Nippon.com: Japanese Firm Confirms Book Sale to Anthropic (October 7, 2026)
- Kyodo News: Japan book wholesaler admits selling books to Anthropic: industry source (October 7, 2026)
- Times of AI: Anthropic IPO prospectus (September 28, 2026)
- Times of AI: Anthropic IPO marketing mid-November (October 3, 2026)