Cybercrime Cyberattack Disrupts Operations of Japanese Frozen Food Giant Nichirei The company disconnected its systems on July 13 and is starting to gradually restore operations. Ionut ArghireJuly 17, 2026
Data Breaches 12 Million Impacted by Data Breach at Japanese Telco KDDI Hackers exploited a zero-day vulnerability in a third-party system to access a KDDI email system for ISPs. Ionut ArghireJuly 9, 2026
Data Breaches Aflac Japan Data Breach Impacts 4.38 Million Hackers accessed the insurance giant’s policyholder portal multiple times between June 15 and June 25. Ionut ArghireJune 30, 2026
Government Japan, Britain to Boost Cybersecurity and Critical Minerals Cooperation as China’s Influence Grows Japan and Britain agree to accelerate cooperation on cybersecurity and the supply of critical minerals, as China’s influence grows in the region. Associated PressFebruary 2, 2026
Data Breaches 700,000 Records Compromised in Askul Ransomware Attack The e-commerce and logistics company was targeted by the RansomHouse ransomware group in October. Eduard KovacsDecember 16, 2025
ICS/OT Japan Issues OT Security Guidance for Semiconductor Factories The 130-page document covers several important aspects and it’s available in both Japanese and English. Eduard KovacsOctober 31, 2025
Cybercrime Cyberattack on Beer Giant Asahi Disrupts Production The incident has resulted in a system failure that impacted orders and shipments in Japan, and call center operations. Ionut ArghireSeptember 30, 2025
Data Breaches 18,000 Organizations Impacted by NTT Com Data Breach NTT Communications Corporation has disclosed a data breach impacting the information of nearly 18,000 customer organizations. Ionut ArghireMarch 7, 2025
Cyberwarfare Japan Links Chinese Hacker MirrorFace to Dozens of Cyberattacks Targeting Security and Tech Data Japan says China-linked cyberattacks were systematic attacks with an aim of stealing data on Japanese national security and advanced technology. Associated PressJanuary 8, 2025
Nation-State Japan’s Space Agency Was Hit by Multiple Cyberattacks, but Officials Say No Sensitive Data Was Taken Japan’s space agency has suffered a series of cyberattacks, but sensitive information related to rockets and satellites was not affected. Associated PressJune 24, 2024
Ransomware Japan’s Nagoya Port Suspends Cargo Operations Following Ransomware Attack Japan’s Port of Nagoya this week suspended cargo loading and unloading operations following a ransomware attack. Ionut ArghireJuly 5, 2023
Cyberwarfare Rapid7: Japan Threat Landscape Takes on Global Significance Rapid7 analyzes the Japan threat landscape and warns that attacks against the third-largest economy in the world have global consequences. Kevin TownsendJune 29, 2023