Japan’s premier taxi operator, Nihon Kotsu, recently experienced a severe cybersecurity breach that forced a sweeping shutdown of its internal networks. The company publicly disclosed that it detected unauthorized external access tied to a malware infection in the early morning hours of Saturday, July 11, 2026. In response to the immediate threat, IT teams enacted emergency containment measures to isolate the network and prevent the malicious software from spreading deeper into the corporate infrastructure.
The abrupt system shutdown has caused widespread operational disruption across the company's core services. Currently, Nihon Kotsu’s automated telephone-based taxi dispatch service and its web-based hire car reservation system are completely unavailable. Internal corporate management tools have also been knocked offline, creating a significant logistical hurdle for one of Tokyo's most recognizable transit fleets.
To mitigate the impact on commuters, the company has deployed manual and digital workarounds to keep passengers moving. Customers requiring a taxi are being advised to utilize the GO smartphone application and specifically select Nihon Kotsu as their provider, or alternatively, to flag down vehicles at physical taxi stands and on the street. While the advance-booking system for hire cars remains non-functional, these alternative methods are keeping the fleet operational during the system outage.
Specialized external cybersecurity agencies have been brought in to conduct a comprehensive forensic analysis of the breach. Investigators are currently reviewing system logs to determine the initial attack vector and map the full scope of the network compromise. Nihon Kotsu emphasized that while the investigation is ongoing, there is currently no definitive evidence showing that customer or partner data has been stolen or compromised.
As the technical teams prioritize a secure and methodical system recovery, the company has pledged full transparency regarding the incident. Officials stated that if any data leaks are uncovered, they will immediately notify the affected individuals and report the breach to authorities in compliance with Japan’s Act on the Protection of Personal Information. Additionally, Nihon Kotsu has urged the public to remain vigilant against phishing attempts, warning customers to ignore any suspicious emails or messages impersonating the firm.
Source: https://www.nihon-kotsu-taxi.jp/news/260713/