The Quad Without Convergence: India, Japan, and the Resilience of Minilateral Cooperation

National Bureau of Asian Research | Arijit Mazumdar

Australia, India, Japan, and the United States revitalised the Quadrilateral Security Dialogue in 2017 to coordinate strategic responses to China's growing regional assertiveness. Despite shared strategic concerns, structural divergences between member states continue to hamper deeper institutional integration. Japan views the Quad as a mechanism for embedding rules, standardized procedures, and formalised security architecture across the Indo-Pacific.

Conversely, India treats the framework as a flexible, non-binding coordination mechanism designed to signal maritime deterrence while safeguarding its traditional strategic autonomy. Institutional convergence remains unlikely. Instead, practical utility derives from opt-in capacity building, flexible maritime domain awareness initiatives, and informal security logistics rather than mutual defence obligations. Policymakers in Washington must therefore design future Quad initiatives around role differentiation rather than rigid operational integration. Measuring success by institutionalisation risks repeated frustration, whereas maintaining adaptable, flexible cooperation ensures the minilateral framework endures despite shifting domestic political alignments and changing partner preferences.

Comment

India's preference for flexible minilateralism reflects the operational mechanics of its bilateral logistics framework rather than a structural rejection of Quad security coordination. Through reciprocal supply arrangements like the 2020 Acquisition and Cross-Servicing Agreement (ACSA) with Japan, New Delhi secures naval refuelling, repair, and sustainment access across the Indo-Pacific without accepting collective defence mandates. This modular approach allows the Indian Navy to extend its operational reach in the Eastern Indian Ocean while insulating its strategic autonomy from formal treaty obligations. Minilateral utility in this context depends on bilateral sustainment nodes rather than centralized command structures.

The practical mechanics rely heavily on interoperable replenishment systems during routine drills like Exercise Malabar. Fuel transfers and standardized underway replenishment protocols enable participating fleets to maintain persistent sea presence without establishing permanent overseas bases. Consequently, sustainment capacity expands through targeted bilateral protocols, bypassing the need for a unified Quad military charter.

Strategic Question for Discussion

Which factor exerts greater influence over naval endurance in the Indian Ocean — institutionalized multilateral logistics hubs or targeted bilateral arrangements like the India-Japan ACSA?

Targeted bilateral frameworks like ACSA provide immediate operational flexibility and access without requiring member states to reconcile competing strategic doctrines. While centralized multilateral hubs offer superior economies of scale, bilateral sustainment agreements allow participating navies to maintain persistent presence while preserving operational discretion during regional crises. The available evidence points toward minilateral maritime endurance continuing to rely on this web of bilateral arrangements rather than formal Quad-wide logistics structures.

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