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.

👉 Read Ichida’s original ACD post

Take Action: Is Your Organisation Ready?

Speak with our team to assess your organisation’s readiness. Contact Us

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