Abstract: India, China and Japan, the economic big three in Asia, is heavily dependent on maritime trade in terms of importation of energy and other natural resources in addition to import/export of manufactured products. Major economic, political and security impact has been resulted from such a dependence, as the sea-lines of communication for maritime trade across the Indian Ocean and West Pacific is vulnerable to heavy conventional/unconventional threat. Policy measures have been taken in order to mitigate the vulnerabilities. Accelerated development of maritime powers, bilateralism/multilateralism, enhanced engagement with regional players and diversification policies are among such effort. The unconventional challenges are on the decline, partly thanks to effective counter-measures, while the conventional challenges is on the rise, also partly due to the mis-match of policies from major stakeholders. The Rise of Indo-Pacific Concept and the Emerging Maritime Regionalism can be a double-edge sword. Clarification of strategic intention and effective policy dialogue is needed for a more harmonious maritime engagement among the three. Strategic vision and smart policies are needed to ensure a cooperation for the benefit of all stakeholder inclusive of the three countries in particular. Full text available here.