Abstract: This article examines the implications of Japan’s strategic partnerships with Association of Southeast Asian Nations (ASEAN) member-countries on its foreign aid policy. Although there were previous attempts at aligning the broad goals of Japan’s aid policy with security and defence objectives, it argues that these partnerships have increasingly led to the emergence of a securitized aid. This is because strategic partnership, as a new form of security practice in the Asia-Pacific, extends the scope of Japan’s regional cooperation to the fields of defence and security. The overall extent of Japan’s aid securitization is still minimal but prominent in terms of the aid discourse, pattern of allotments or choice of recipients and institutional structures. Despite the adoption of new development cooperation charter in 2015, the use of Japan’s ODA is still confined to non-military use which limits Tokyo’s desire to deepen its security cooperation with ASEAN partner-countries.