Japan's Mizuho Bank revealed on December 31 that around 7 a.m. local time, the online banking system for individuals and businesses had trouble connecting, and was later fixed around 10 a.m. According to reports, the system was hit by a “DDoS attack” that burdened the server by sending large amounts of data. To date, no customer data leaks or virus damage have been discovered. According to information, the Bank of Mitsubishi UFJ and JAL also successively broke down in late December. According to the analysis, they were all affected by DDoS attacks.

Japan's Mizuho Bank revealed on December 31 that around 7 a.m. local time, the online banking system for individuals and businesses had trouble connecting, and was later fixed around 10 a.m. According to reports, the system was hit by a “DDoS attack” that burdened the server by sending large amounts of data. To date, no customer data leaks or virus damage have been discovered. According to information, the Bank of Mitsubishi UFJ and JAL also successively broke down in late December. According to the analysis, they were all affected by DDoS attacks.