Data breaches caused by unauthorized access have occurred one after another, primarily at major Japanese companies. The impact of IDC Frontier left websites inaccessible and systems down at 495 contracted entities. There have also been reports of cases in which a system outage at 日水物流 halted the receipt and shipment of food products.
IDC Frontier was hit by a cyberattack, reportedly leaving the websites of 495 contracted companies and municipalities inaccessible and causing system outages. At 日水物流, the receipt and shipment of food products were temporarily halted because of a system outage.
Services including Eki-net have also been identified as potentially affected by data breaches, and some believe that supermarket inventory management and customer services could be affected.
The number of cyberattacks against Japan reportedly exceeded 1.5 billion between October 2025 and September 2026. The number reached approximately 500 million in February 2026 in particular, and a tendency for this to coincide with the timing of the House of Representatives election has been noted.
Three effective measures have been identified to prevent data breaches, and a former National Police Agency expert said that personal data should be managed on the assumption that it will be leaked.