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WF-1ZOPC6

High school student used ChatGPT to hack Kaikatsu Club, steal 7.25 million records

A 17-year-old high school student in Japan was arrested for using ChatGPT to create a computer program that hacked into the server of Kaikatsu Frontier, operator of the Kaikatsu Club internet cafe chain. The student allegedly obtained approximately 7.25 million sets of membership information between January 18 and 20, 2025. No misuse of the data has been confirmed. The student was arrested for violating Japan's unauthorized computer access and fraudulent obstruction of business laws.

Date it happened
2025-01-18
Organisation involved
Kaikatsu Frontier
Product, system or model
ChatGPT
Where this came from
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Attribution

This incident was imported from japantimes.co.jp. Our additions to it — the structured fields, the translation, the checks against other reports — are published under the same licence.

This is a record of what was reported, not a finding that anyone broke the law. If it names your organisation and you believe it is wrong, the corrections process is free and open to everyone.