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Japan Active Cyber Defense Act: Registration and incident reporting duties start

Name: Japan Active Cyber Defense Act: Registration and incident reporting duties start
Start: 2026-10-01
Location: Japan

Thu, October 1, 2026 · Japan

41 days ago

Source

Main provisions take effect, including Chapter 2 duties for special social infrastructure operators to register important computers and report specified intrusion incidents. Not legal advice.

Every year

May 23, 2025Japan Active Cyber Defense Act: Act promulgatedJapanAn event in Japan.18 mo agoRegulationsDetails →Apr 1Japan Active Cyber Defense Act: Supervisory Commission provisions in forceJapanAn event in Japan.7 mo agoRegulationsDetails →

Oct 1Japan Active Cyber Defense Act: Registration and incident reporting duties startJapanAn event in Japan.41 days agoRegulations

TentativeNov 22, 2027Japan Active Cyber Defense Act: Communications data measures in force (latest date)JapanAn event in Japan.in 12 moRegulationsDetails →

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Source, method and history

Source

Regulations

How we know

From the Regulations API (regulations.fru.dev), which cites the official text.

Recurs

one-off

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Changes

2026-09-27: added to 2026-10-01