Japan's Cybersecurity Crisis Deepens as Attacks Surge 37% in…

Event summary

Japan recorded 86 cybersecurity incidents in September 2026, a 37% increase from July and 18% from August, surpassing all of 2025's incidents in just nine months.
TrendAI's Incident Response team observed attackers exploiting vulnerabilities in public-facing applications to plant web shells on servers, enabling potential privilege escalation and lateral movement.
The Liberal Democratic Party's National Cybersecurity Strategy Headquarters declared 'cyberspace is in a state of emergency' and called for strengthened public-private cooperation.
TrendAI recommends immediate patching of internet-facing systems, hardening web servers, monitoring database access, and strengthening identity verification to mitigate risks.
TrendAI plans to introduce new AI security capabilities, including AI Gateway and AI Risk Insights solutions, in December 2026, with general availability scheduled for January 2027.

The big picture

Japan's cybersecurity crisis underscores the global trend of escalating cyber threats amplified by AI. As attackers leverage AI to lower the cost and increase the scalability of attacks, organizations face a new baseline of relentless cybercrime campaigns. TrendAI's threat advisory highlights the urgent need for proactive security measures and robust public-private collaboration to safeguard critical infrastructure and sensitive data. The introduction of new AI security capabilities by TrendAI reflects the industry's response to the evolving threat landscape, emphasizing the importance of visibility, observability, and governance in AI security.

What we're watching

AI-Driven Threats: How AI's role in accelerating reconnaissance and automating attacks will shape future cybersecurity strategies in Japan and globally.
Regulatory Response: Whether Japan's government can effectively strengthen public-private cooperation to mitigate the surge in cyberattacks.
Market Adaptation: The pace at which organizations adopt TrendAI's recommended security measures and new AI security capabilities to protect against evolving threats.