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Latest coverage for Japan

Coverage of cybersecurity incidents, policy, privacy, public-service disruptions, advisories, and regional developments involving Japan.

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Japan covers cybersecurity and information-security developments connected to Japan, including incidents, policy, privacy, advisories, research, and news affecting organizations, public services, and digital systems in the area.

For practitioners, the tag provides geographic context for developments involving Japan's organizations, services, partners, and users. Individual articles provide the specific technologies, threats, sectors, and operational implications relevant to each development.

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Security Affairs 2 weeks, 3 days ago

Hackers Steal Data of 4.38 Million Aflac Japan Customers

Hackers stole data from 4.38 million Aflac Japan customers after accessing its systems for 10 days before the breach was detected. Aflac Japan disclosed that hackers stole the personal information of 4.38 million customers and agents after gaining access to its systems between June 15 and June 25. Attackers stole data from the company policyholder […]

Security Affairs 1 Jul 2026, 3:54 a.m. Incident · 3 stories Breach Disclosure Japan PII Theft

KDDI Corporation disclosed a breach affecting up to 14.2 million email accounts after attackers exploited a vulnerability in third-party software. KDDI Corporation disclosed a data breach that exposed up to 14.2 million email accounts across six Japanese internet service providers. KDDI Corporation is one of Japan’s largest telecommunications companies. It employs more than 60,000 people […]

Security Affairs 29 Jun 2026, 7:11 a.m. Breach Disclosure Email Exposure Japan Service Provider Vulnerability