Description: A 17-year-old boy in Osaka was reportedly served an arrest warrant for allegedly breaching Kaikatsu Frontier's server using a program purportedly generated with a conversational AI tool. The January cyberattack may have exposed personal data of 7.3 million customers and disrupted business operations. Police say the suspect concealed malicious intent when prompting the AI. He was previously arrested for unrelated credit card fraud.
Editor Notes: Timeline notes: The reported cyberattack occurred on 01/18/2025. The suspect was reportedly arrested on 12/04/2025. The incident ID was created 12/06/2025.
Entities
View all entitiesAlleged: Unknown generative AI developers developed an AI system deployed by Unnamed 17-year-old boy from Osaka, which harmed Kaikatsu Frontier and Kaikatsu Frontier customers.
Alleged implicated AI systems: Unknown generative AI systems and Unknown large language models
Incident Stats
Incident ID
1295
Report Count
2
Incident Date
2025-01-18
Editors
Daniel Atherton
Incident Reports
Reports Timeline
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Kaikatsu Frontier post-incident response
Updated March 17, 2025, 4:00 PM
March 17, 2025
Kaikatsu Frontier Co., Ltd.
Notice Regarding Unauthorized Access and Possible Personal Information Leakage
(Fifth Report)
As previously announced on January 21 and January 28, 2025, regarding u…
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TOKYO (Kyodo) -- A 17-year-old boy was served an arrest warrant on Thursday on suspicion of breaching the server of a major internet cafe operator in Japan using a program generated by a conversational artificial intelligence, an investigat…
Variants
A "variant" is an AI incident similar to a known case—it has the same causes, harms, and AI system. Instead of listing it separately, we group it under the first reported incident. Unlike other incidents, variants do not need to have been reported outside the AIID. Learn more from the research paper.
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