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Malware Hits Japan’s Largest Taxi Company Nihon Kotsu, Services Temporarily Suspended

Securityaffairs.Co •Pierluigi Paganini • July 14, 2026

Japan’s largest taxi operator Nihon Kotsu shut down systems after a malware attack, disrupting dispatch and bookings. Nihon Kotsu, Japan’s largest taxi company, disclosed on July 13, 2026 that its internal systems suffered an unauthorized external access involving malware infection in the early morning hours of Saturday, July 11. The company immediately shut down systems […]

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Nihon Kotsu Cyberattack Disrupts Taxi Services in Japan On July 11, 2026, Nihon Kotsu, Japan's largest taxi operator, experienced a cyberattack that compromised its internal systems through malware infection. This incident forced the company to shut down its taxi dispatch system and other critical services, impacting operations for its fleet of 8,558 taxis and over 2,000 chauffeur vehicles. The company, which generates approximately ¥155 billion annually, has advised customers to use the GO taxi app or hail taxis directly while the systems remain offline. Nihon Kotsu is collaborating with external cybersecurity experts to investigate the breach and assess potential data exposure. As of now, no data leaks have been confirmed, but the investigation is ongoing. The company has also warned customers against opening suspicious communications claiming to be from Nihon Kotsu. 6 sources 55

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Malware Hits Japan’s Largest Taxi Company Nihon Kotsu, Services Temporarily Suspended

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