本文梳理了日印两国准同盟关系的形成、特点、原因和影响。日本、印度两国的接近，既因为双方在国家战略方向上的契合，又因为美国的影响、中国的崛起等外部因素的作用。这首先会对亚太安全环境造成影响，使本已复杂的亚太安全环境更加复杂。其次会使“印太”概念得到发展，使之逐步从一个战略构想变为现实存在。最后还会在一定程度上对中国造成压力。针对日印准同盟的发展，中国应该保持足够的战略定力，不可自乱阵脚。
The paper reviews the formation，characteristics，causes and effects of quasi-alliance between Japan and India. The Japan-Indian relationship，which is becoming increasingly close，results from the match of two countries’ strategic directions，as well as external factors such as the rise of China and the influence of the U.S. The Japan-India quasi-alliance will firstly make the security situation of the Asia-Pacific region more complex. Then it will promote the development of the concept of “Indo-Pacific”，and will transform it into a reality from a strategic vision. Finally，the Japan-India quasi-alliance will put pressure on China. Facing the developing Japan-India quasi-alliance，China should react with a calm strategic posture.
