On October 1, 2026, Japan’s Act on Prevention of Damage Caused by Unauthorized Acts against Critical Electronic Computers (Act No. 42 of Reiwa 7, widely called the "Active Cyber Defense law" or サイバー対処能力強化法) came into force. Today is day 13. If you sell software, run systems, or host workloads for a Japanese power, telecom, finance or rail company, your customer’s compliance team is already drafting questions for you.
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