Abstract
Japan’s principal security interest in Southeast Asia is the safety and security of regional sea lanes. Over the past several years, Japan has expressed growing concern at rising tensions in the South China Sea and the lack of progress by the claimants to negotiate effective conflict management mechanisms. Japan is not a claimant in the dispute, but as a major maritime trading nation, it is a significant stakeholder. Japan has two major concerns over the South China Sea. First, that instability has the potential to disrupt the free flow of maritime trade on which the country’s economic prosperity depends, and, second, that if China is able to persuade of coerce other Asian nations into accepting its claimed ‘historic rights’ in the South China Sea, existing international legal norms would be undermined. Moreover, Tokyo is alarmed at China’s increasingly assertive posture in the maritime domain, and views the disputes in the South and East China Seas as linked. To mitigate its concerns over the South China Sea, Japan is pursuing a number of strategies: it raises the problem at regional security forums; it seeks to enhance cooperation with the Association of Southeast Asian  Nations on issues of maritime security and encourage unity within the organization on the South China Sea; it discusses the problem bilaterally with Southeast Asian countries and has started to provide capacity-building support to selected claimants (principally, the Philippines); and it seeks closer ties with other external stakeholders that share its concerns.
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