Japan's financial watchdog to meet top banks to discuss Mythos AI model (updated)

Mizuho Financial

22/04/2026 09:45

Changing sourcing with finance minister comments

TOKYO, April 22 (Reuters) - Japan's financial watchdog will meet with the country's biggest lenders on Friday to discuss issues related to Anthropic's advanced Mythos artificial intelligence model, Finance Minister Satsuki Katayama said on Wednesday.

The meeting, set up by the Financial Services Agency, will bring together top lenders Mitsubishi UFJ Financial Group Inc 8306.T, Sumitomo Mitsui Financial Group Inc 8316.T and Mizuho Financial Group Inc 8411.T.

The Bank of Japan and the Tokyo Stock Exchange will also join the meeting, Katayama told reporters.

"We will bring together the core members who bear the greatest responsibility to share assessments of the current situation and exchange views, including issues that have been flagged in various parts of the international financial community," she said.

Designed for defensive cybersecurity tasks, Mythos' vast capabilities have sparked fears about the threat to traditional software security, after Anthropic said a preview had uncovered "thousands" of major vulnerabilities in "every major operating system and web browser."

     Some Asian financial regulators
said
 this week they were taking measures to address the risks posed by Mythos.

 (Reporting by Disha Mishra in Bengaluru and Makiko Yamazaki in Tokyo; Editing by Tom Hogue and Louise Heavens)

 ((Disha.Mishra@thomsonreuters.com))