Under Japan's APPI, personal data handlers must implement necessary security measures (Art. 23): organizational, human, physical, and technical. The 2022 reform mandated breach reporting to the PPC (Art. 26(1)) for sensitive data, financially damaging, malicious, or 1,000+ person breaches. Timeline: preliminary report within 3-5 days, full report within 30 days (60 for malicious). Individual notification also required (Art. 26(2)). Damages per person: ¥3-5K basic info, ¥5-15K credit cards, ¥10-30K medical data. Criminal penalties: up to 1 year imprisonment/¥1M fine for individuals, ¥100M for corporations (Art. 178, 184).
Corporate Law- View allLast updated: 2026-03-13
Corporate Liability for Data Breaches in Japan: Response Obligations and Damages
Key Takeaways
- ✓Reporting to the Personal Information Protection Commission is mandatory after a breach
- ✓Companies are obligated to implement data security management measures
- ✓Breach victims can claim damages from the responsible company
- ✓Employee training and access restrictions are fundamental prevention measures
Free Tools for This Area
This article provides general legal information and does not constitute legal advice. For specific legal issues, please consult with a qualified attorney.
Related Articles
Starting a Business in Japan: KK vs LLC Comparison
Comparing stock corporations (KK) and limited liability companies (GK/LLC) for business formation in Japan.
Director Liability in Japan: Duties, Obligations, and Risks
Guide to director duties and liability in Japanese corporate law, including fiduciary duties and shareholder derivative suits.
Labor Compliance for Japanese Companies: Key Regulations and Penalties
Comprehensive guide to labor compliance for Japanese companies, covering key regulations and penalties.
Related Q&A
Related Legal Terms
Find a lawyer through your local bar association
JFBA Legal Consultation Guide →