Hackers broke into Japan's largest train operator and the data of 3.3 million customers were stolen from the databases, according to the organization's website.
In recent months, Japan has seen an increase in the number of cyber attacks on companies and government agencies. For example, in October 2026, hackers disrupted the work of Tokyo IT company Arcadia, which provides cloud services for government agencies. Before that, the data of about 14 million users of the Sky Card Zaber was leaked to the network.