India–Japan Maritime Security Cooperation: Strengthening the Indo-Pacific Partnership

Context:

Recently, Defence Minister Rajnath Singh and Japanese Defence Minister Shinjiro Koizumi held the Japan–India Defence Ministers’ Meeting in New Delhi. The two sides signed a Memorandum of Arrangement (MoA) on Maritime Security Cooperation to strengthen operational coordination and protect vital Sea Lines of Communication (SLOCs) in the Indo-Pacific.

Key Areas of Maritime Cooperation:

The MoA provides a framework for closer cooperation between the Indian Navy and Japan Maritime Self-Defense Force (JMSDF), particularly in:

• • • Maritime Domain Awareness (MDA) and information sharing.
    • Search and Rescue (SAR) operations.
    • Humanitarian Assistance and Disaster Relief (HADR).
    • Protection of SLOCs through naval visits, joint exercises, personnel and Subject Matter Expert exchanges.
    • Logistical cooperation, including access to ports and maintenance and repair facilities.

Defence Technology and Shipbuilding:

• • • India and Japan agreed to explore joint development in naval shipbuilding and design, combining Japan’s technological expertise with India’s production capabilities under the Make in India framework.
    • Both also agreed to strengthen mine-countermeasure capabilities and work towards reciprocal access to ship-repair facilities.
    • The UNICORN integrated communications antenna system was highlighted as the first defence equipment transfer project between the two countries, symbolising their growing defence technology partnership.

Military Exercises:

The two countries welcomed progress in major bilateral exercises:

• • • Dharma Guardian – Army exercise.
    • JAIMEX – Maritime exercise.
    • Veer Guardian 26 – Air Force exercise.

For Veer Guardian 26, Japanese fighter aircraft are scheduled to visit India for the first time. Both sides also agreed to increase exercise complexity and integrate unmanned systems.

Institutional Mechanism::

A Director-General/Joint Secretary-level Working Group will coordinate cooperation across operational, intelligence, equipment, technology and industrial domains. This mechanism aims to accelerate implementation and maximise synergies.

Wider Indo-Pacific Cooperation:

India and Japan welcomed the first India–Japan–Indonesia trilateral naval PASSEX held in February 2026. They also agreed to deepen cooperation through the Indo-Pacific Logistics Network (IPLN) for disaster-relief transportation of personnel and supplies.

Strategic Significance:

The partnership strengthens:

• • Maritime security and freedom of navigation.
  • Protection of critical trade and energy routes.
  • Defence industrial cooperation and self-reliance.
  • India's strategic position in the Indo-Pacific.
  • A free, open and rules-based Indo-Pacific.

Conclusion:

The August 2026 agreement marks a significant expansion of India–Japan defence cooperation from traditional exercises towards operational, technological and industrial integration. By strengthening maritime awareness, SLOC protection, defence technology and regional partnerships, it contributes to stability and security in the Indo-Pacific.