13 Sept 2026JapanUnidentified website-generation tool
Shiga prefectural police sent two teenagers' cases to prosecutors on 27 October 2026 on suspicion of violating Japan's unauthorised computer access law. According to the police announcement as reported by the Yomiuri Shimbun and Asahi Broadcasting (ABC), on 13 September 2026 the two, in Tokyo, sent two women the URL of a site made to look like a real payment service, told them they could receive money, and had them enter details such as email addresses and phone numbers. Police say the two used generative AI to make the phishing site, and the Yomiuri reports that one of them, who is believed to have used generative AI to make the fake site, said he did not have the skill to build a site without AI. The same day, police say, they logged into a travel-booking site with one woman's details and paid a Tokyo hotel bill of 182,830 yen; they were later re-arrested over three portable game consoles bought with another woman's account. Police believe they took about 50 people's information, including from other payment services, and charged about 5 million yen. Both admitted the allegations, according to the police. They are not named here.
Core concern Medium reported severity Criminal Charges
AI involvement reported · Causal attribution alleged · 2 sources, 1 underlying account · Added 28/10/2026
11 Feb 2026Event location unknownUnidentified image tool
Tokyo's Metropolitan Police Department arrested a 32-year-old company employee on 1 August 2026 and referred a 17-year-old high-school student to prosecutors, on suspicion of defamation and public display of child pornography. According to the police, on 11 February 2026 the two, acting together, used generative AI to turn a photo of a woman in her 40s, taken in her first year of junior high school in gym clothes, into two fake nude images, and posted them to a group on social media; the student had asked the man to make the edits. Police say the man is also suspected of posting similar edits of three women in their 20s, that neither suspect knew the women, and that about 3,800 obscene images and videos were found on his phone. The Yomiuri Shimbun, citing investigative sources, reports that police believe he made about 300 such images of women in athletics uniforms or gym clothes and posted about 100, about half at the student's request, and that he admitted the allegations.
Core concern Medium reported severity Criminal Charges
AI involvement reported · Causal attribution alleged · 2 sources · Added 21/10/2026
Mar 2026JapanUnidentified video tool (suspected)
The Yomiuri Shimbun reported on 19 March 2026 that in early March an applicant in a Tokyo IT company's online mid-career job interview used the name, career history and apparent face of a real engineer who heads a Tokyo software company. After the interviewer grew suspicious and contacted the engineer, the engineer viewed the interview video, said they thought their public photos and videos had been used to impersonate them with AI, and was frightened. Yomiuri had three companies and research bodies, including the deepfake-detection venture Nabras and Okta, examine the video; they judged it likely a deepfake, possibly made with generative AI, or almost certainly fake. Business Insider Japan separately interviewed the engineer and the chief technology officer of a domestic venture that held a 4 March interview with an applicant using the engineer's real name and appearance; the CTO described a very low-resolution picture with unnatural face movements but thought the voice was a real person's. Who the applicant was is not established.
Core concern Low reported severity Media Coverage
AI involvement suspected · Causal attribution alleged · 2 sources · Added 19/10/2026
27 Jan 2026 to 28 Jan 2026JapanChatGPT (reported)
Sankei Shimbun reported on 10 June 2026, and NTV on 13-14 June, that the Tokyo Metropolitan Police Department's juvenile crimes division had arrested five high-school students on suspicion of injury and attempted extortion. According to the police account, late on 27 January 2026 a suspect who had previously dated a 17-year-old high-school boy invited him to a public square in Hachioji, where the group accused him of having touched her younger sister, assaulted him and broke his nose, and then told him to raise 150,000 yen, borrowing from his parents or friends if necessary. About ten people were present. Police believe the amount came from ChatGPT: one of them entered terms such as 'sexual harm to a child', and the chatbot displayed a minimum settlement of 150,000 yen. No payment is reported. Shukan Josei PRIME reports that four of the five admit the allegations and one partly denies them. The allegations are untested.
Core concern Medium reported severity Involving minors Criminal Charges
AI involvement reported · Causal attribution alleged · 3 sources, 1 underlying account · Added 29/09/2026