
Japan Government Declares Cyber Emergency Following Data Breaches
Government officials warn of a state of emergency in cyberspace after multiple high-profile data breaches across industries.
12 Oct 2026
#Japan #Ministry for Finance #Times Car Rental #Lawson #National Cybersecurity Office #JR East
Japan's government has declared a crisis in the digital sector after waves of cyberattacks. Officials told ministries and companies to strengthen their defences immediately. The head of the National Cybersecurity Strategy Headquarters called it a state of emergency in cyberspace during an emergency meeting. This assessment appeared in reports from the Financial Times regarding comments by Masaaki Taira on Friday, 9 October.
New orders were sent to financial regulators and public bodies on that same Friday. The Ministry for Finance advised banks to use verification mechanisms like ID cards with chips when opening accounts. Digital Transformation Minister Toshiharu Furukawa noted that attacks are becoming increasingly sophisticated. These instructions cover basics such as updating security software and tightening supply chain security.
Several major companies disclosed breaches affecting large numbers of people recently. Times Car Rental said a hack compromised about 6.6 million member accounts last month. A convenience store chain named Lawson reported that customer records were illegally accessed. The National Police Agency logged a record number of ransomware incidents in the first half of this year.
More victims joined the list as details emerged from other sectors and sources. Rail operator JR East lost 1.67 million customer email addresses according to reporting by the Financial Times. Daiwa Securities and Bookoff also reported data leaks alongside the car rental firm. A SoftBank cloud subsidiary faced a ransomware attack on 7 October that hit hundreds of organizations.

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The number of recorded cyber incidents is reaching new heights in the country. Between January and June, Japan saw a total of 123 cases of ransomware attacks. The National Police Agency confirmed this figure to The Japan Times during their reporting cycle. Officials say the trend shows no sign of slowing down despite recent warnings.
Authorities now have new tools to stop attackers using their own methods. Deputy Chief Cabinet Secretary Yusuke Nakanishi spoke about access neutralization steps available since 1 October. These powers came into force under Japan's active cyber defence law according to The Japan Times. This allows the government to take specific actions to block intruders during ongoing incidents.
Experts discussed the role of artificial intelligence in driving these security challenges. One expert told a newspaper there is no firm evidence that AI guided the recent attacks. However, a security firm leader said large language models are drastically lowering the cost for skilled hackers. Other nations have seen links between bank breaches and AI tools used by suspects abroad.
Japan is not facing this issue in isolation as other regions deal with similar threats. Government websites across Europe were targeted in attempted data breaches over recent months. Danish authorities alerted the public to a serious incident after hackers accessed personal information of many people. Experts also cite Japan's ageing population and lagging digitization as key vulnerabilities.