Strengthening Subsea Cable Security in the Indo-Pacific

Why It Matters

Secure subsea cables are critical to the Indo‑Pacific’s economic engine and to global digital stability; any disruption could reverberate across supply chains, finance, and national security.

Key Takeaways

• 95% of global data travels via subsea cables
• Japan hosts at least 20 landing stations
• Most cable damage results from accidents, not sabotage
• Outdated maritime laws hinder cable security regulation
• Cooperation needed for redundancy and resilience

Pulse Analysis

The Indo‑Pacific now underpins more than a third of worldwide economic activity, and its subsea fiber‑optic network is the backbone of that growth. With 95% of global data flowing through underwater cables, the region’s digital infrastructure is as vital as its physical trade routes. Countries such as Japan, China, India, and emerging economies rely on a dense web of landing stations and routes to support cloud services, e‑commerce, and streaming, making the health of these cables a direct indicator of regional competitiveness.

Despite their importance, subsea cables remain vulnerable. Historical data shows that the majority of incidents arise from natural disasters, fishing gear, and routine maritime accidents, yet the specter of intentional sabotage looms, especially as geopolitical tensions intensify. Existing maritime laws, many drafted decades ago, lack the specificity to address modern cyber‑physical threats, creating regulatory blind spots that complicate rapid response and preventive measures. This legal lag hampers both governments and private operators from implementing robust protective standards.

To mitigate these risks, CSIS advocates for a coordinated, multi‑layered approach that aligns regulatory frameworks, streamlines permitting, and incentivizes private‑sector investment in redundant pathways. By fostering cross‑border cooperation and updating maritime statutes, nations can accelerate cable deployment, diversify routing, and embed resilience into the network’s design. Such collaborative mechanisms not only safeguard data flows but also reinforce broader maritime security, ensuring the Indo‑Pacific remains a stable conduit for global commerce and digital innovation.