Abstract: As the main initiator and promoter of Japan's “IndoPacific” concept, Abe played a key role in the formation of Japan's “IndoPacific” concept. Yoshihide Suga, who succeeded Abe as Prime Minister of Japan, continued the concept and framework of the “IndoPacific” concept promoted by Abe. At the same time, under the impact of COVID19 and the increasingly fierce competition between China and the United States, Japan's “IndoPacific” concept has been further developed, which includes attaching importance to the economic security factors, paying attention to the feelings of countries in the region, and supporting ASEAN to play a central role in the IndoPacific region. In the postAbe era, Japan's “IndoPacific” concept will actively attract major countries in the world, such as ASEAN, Great Britain, France, and Germany, to intervene in IndoPacific affairs on the basis of values diplomacy and geocompetition, and binding the JapanUS. alliance and Japan's “IndoPacific” concept in depth, making every effort to shape the IndoPacific region into an “area” for competition among major powers, creating a “circle of friends” that encircles China. As a result, SinoJapanese relations in the postAbe era and China's surrounding security environment will face greater strategic pressure.

Key words: Indo-Pacific concept, Japan-U.S. alliance, values diplomacy, fournation mechanism, economic security