Jurisdiction · 3 regulations

Japan: data, AI and cyber laws

3 regulations in Japan that affect companies handling data: Japan AI Promotion Act, Japan APPI, Japan Active Cyber Defense Act. Part of APAC.

3 regulations

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	Status
Japan Active Cyber Defense Act Act on the Prevention of Damage from Unauthorized Acts against Important Computers (Act No. 42 of 2025)	Enacted	Oct 1, 2026in 5 days	Oct 1, 2026in 5 days Registration and incident reporting duties start
Japan AI Promotion Act Act on Promotion of Research and Development, and Utilization of Artificial Intelligence-Related Technology	In force	Jun 4, 20251 year ago	None upcoming
Japan APPI Act on the Protection of Personal Information (Act No. 57 of 2003), as amended including the 2026 amendment act	Amended	Apr 1, 200521 years ago	None upcoming

Upcoming deadlines

Date	Regulation	What happens	When
Oct 12026in 5 days	Japan Active Cyber Defense ActJapan Active Cyber Defense ActJapan Registration and incident reporting duties start	Registration and incident reporting duties start	in 5d
Nov 222027in 1 year	Japan Active Cyber Defense ActJapan Active Cyber Defense ActJapan Communications data measures in force (latest date)tentative	Communications data measures in force (latest date)tentative	in 14mo

Past deadlines

Date	Regulation	What happens	When
Jul 1720262 months ago	Japan APPIJapan APPIJapan 2026 APPI amendment act promulgated	2026 APPI amendment act promulgated	2mo ago
Apr 120265 months ago	Japan Active Cyber Defense ActJapan Active Cyber Defense ActJapan Supervisory Commission provisions in force	Supervisory Commission provisions in force	6mo ago
Sep 120251 year ago	Japan AI ActJapan AI Promotion ActJapan AI Promotion Act fully in force	AI Promotion Act fully in force	13mo ago
Jun 420251 year ago	Japan AI ActJapan AI Promotion ActJapan AI Promotion Act promulgated and partly in force	AI Promotion Act promulgated and partly in force	16mo ago
May 2320251 year ago	Japan Active Cyber Defense ActJapan Active Cyber Defense ActJapan Act promulgated	Act promulgated	16mo ago
Apr 120224 years ago	Japan APPIJapan APPIJapan 2020 amendments in force	2020 amendments in force	4.5y ago

Rule changes by email

The morning after a new data, privacy or AI law, or a deadline change; nothing in quiet weeks.