Amid continuing cyberattacks in Japan and overseas, personal information relating to a cumulative total of approximately 57 million people was found to have been leaked in Japan over the past month. The Financial Services Agency called on financial institutions to conduct security inspections and thoroughly verify customers' identities, strengthening warnings about the risk of unauthorized use following leaks of images such as driver's licenses.
Amid a series of cyberattacks in Japan and overseas, it has emerged that personal information relating to a cumulative total of approximately 57 million people was leaked in Japan over the past month. The leaks occurred through multiple companies and services, and the government is calling for stronger security measures.
Specifically, information relating to approximately 10.78 million people may have been leaked from Monogatari Corporation's Yakiniku King restaurant chain, approximately 6.6 million people's information may have been leaked from Park24's Times Car car-sharing service, and up to approximately 14.64 million customer records may have been leaked from Adventure, which operates the travel-booking website Skyticket. The periods and numbers associated with the leaks are presented as cumulative totals and may differ from the actual number of individuals affected.
On 9 October, the Financial Services Agency called on financial institutions to strengthen cyberattack measures and thoroughly verify customers' identities. In light of the risk that images of identity documents such as driver's licenses may have been leaked, it requested reviews of systems, including those of outsourced providers, and revisions to procedures for handling fraud.
The government is also investigating whether AI was involved and has stated that the relevant ministries and police will promptly analyze whether AI played a role in recent cyberattacks. No specific involvement has been confirmed at this point.