The Register/Nikkei: Japan PM Takaichi orders cabinet-level cybersecurity review of government systems and critical infrastructure, citing Mythos threat
Japan's Prime Minister Sanae Takaichi ordered a cabinet-level cybersecurity review in direct response to Anthropic's Mythos, instructing cybersecurity minister Hisashi Matsumoto to check government systems for detectable vulnerabilities and develop measures so critical infrastructure operators can do likewise. The Register reported Takaichi stated that Mythos and similar frontier models may be misused, and that attacks on infrastructure may therefore increase in speed and scale, perhaps even exponentially.
A PM-level cabinet order covering all of Japan's government systems and critical infrastructure — not just the financial sector addressed by the April FSA working group — makes Japan one of the few countries to issue a whole-of-government cybersecurity directive directly citing a named AI model.