Abstract: In recent years, Japan-India relations have become increasingly close, and the bilateral security cooperation has continued to intensify. Traditional geopolitical considerations, concerns about energy supply security, and theresponse to changes in security structure in Asia have become driving forces behind Japans strengthening of security cooperation with India, and Japanese Prime Minister Shinzo Abe has become the main promoter. Strengthening security cooperation between Japan and India will worsen the diplomatic environment around China, increase the difficulty to settle territorial disputes peacefully, and induce the growth of instability in Asia. At the same time, it will also promote the transformation of Japans marine strategy and the construction of a normal country. In the future, JapanIndia security cooperation will be comprehensively deepened in areas such as strategic coordination and regional order construction. The impact of such cooperation trend on China deserves vigilance, but it is also necessary to consider objectively. After all, Indias nonaligned diplomatic tradition and its great ambitions may not necessarily lead to a full cooperation with Japans strategic arrangements.

Key words: JapanIndia relationship, security cooperation, marine security, geostrategy, regional order