Aflac Japan Data Breach Affects 4.38 Million Customers

On June 30, 2026, Aflac Japan disclosed a data breach affecting its systems between June 15 and June 25, 2026. The breach involved unauthorized access by third-party attackers, compromising sensitive information including personal and bank account details of approximately 4.38 million customers. Aflac Japan has engaged external cybersecurity experts to investigate the incident and has notified the Japan Financial Services Agency. While the breach is limited to Aflac Japan's systems, the full impact remains uncertain. The company has suspended certain systems to contain the breach while continuing to serve policyholders. This incident follows a previous breach attributed to Scattered Spider, raising concerns about the cybersecurity of insurance companies.

Key Points: • Aflac Japan's systems were breached, affecting 4.38 million customers. • Sensitive data compromised includes personal and bank account information. • The breach occurred between June 15 and June 25, 2026, with ongoing investigations.