- Risk Management
- April 23, 2025
Japan’s Active Cyber Defense Bill Passes Lower House
What critical national infrastructure (CNI) and manufacturing leaders should do now
Japan Approves Cyber Security Legislation Allowing Preemptive Threat Disruption by 2027
On April 8, 2025, Japan’s Lower House passed the Active Cyber Defense (ACD) bill, authorising preemptive cyber threat disruption—including attacker infrastructure takedown—under strict legal safeguards. Full implementation is expected by 2027, embedding ACD across both government and enterprise networks.
Why Japan’s Active Cyber Defense Bill Matters Now for Business
As explained in Ichida’s original ACD briefing, this bill marks a strategic shift from defensive cyber security to real-time threat disruption. It responds directly to persistent cyber campaigns targeting critical national infrastructure and industrial supply chains in Japan.
The message to C-suite leaders is clear: Companies operating in these sectors must prepare to integrate into a government-backed active defence model—one that involves real-time visibility, cross-sector coordination, and legal accountability.
How NCD Supports Compliance with Japan’s Cyber Security Strategy
Nihon Cyber Defence (NCD) offers the only platform built to support Japan’s cyber security and sovereignty goals under the ACD framework. Our solution is designed specifically to meet the requirements of regulated Japanese industries as they adapt to new cyber laws and national frameworks.
Platform Capabilities:
- Government-aligned defence: Integrated with NISC, ISACs and CSIRTs
- Advanced threat detection: Real-time, cross-sector visibility into Advanced Persistent Threats (APT) and ransomware
- 24/7 SOC-ready automation: AI-powered response for high-throughput or lean teams
- Japan-built infrastructure: Fully sovereign, no foreign dependencies
- Privacy-by-design compliance: Built to meet Japanese oversight and legal standards
Active Cyber Defense in Japan is No Longer Optional
This bill is the operational future of cyber defence in Japan. With rising threats and stricter compliance expectations, Japan’s leading CNI, financial, and manufacturing firms will need trusted, sovereign, and integrated platforms to stay secure and aligned.
NCD is purpose-built for this moment.
Take Action: Is Your Organisation Ready?
Speak with our team to assess your organisation’s readiness. Contact Us
Retired Admiral, Japan Maritime Self-Defense Force, Senior Advisor @ Nihon Cyber Defence
Retired JMSDF Admiral, Ichida led MSDF cyber operations, intelligence enhancements, advancing cyber defence, information sharing, and overseas training for Japan’s military.
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Nihon Cyber Defence (NCD) offers comprehensive Cyber Maturity Assessments designed to evaluate an organisations current cyber security capabilities, identify areas for improvement, and develop a strategic roadmap to enhance overall security posture.
Cyber Security Framework (NIST)
National Institute of Standards and Technology
Cyber Assessment Framework (CAF)
National Cyber Security Centre
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