Japan not only pays great attention to the Asia-Pacific region，but also gradually increases its focus on the Indian Ocean region，and continues to propose relevant strategic development plans.In 2006，Japanese Prime Minister Shinzo Abe had proposed the concept of“Japan-the United States-Australia -India”the strategic cooperation in 2006，and proposed the concept of“Asia's Democratic Security Diamond”in 2012，and the concept of“free and open Indo-Pacific Strategy”in 2016，promote the concept of“Indo-Pacific”germination and development in Japan，which gradually raises to the important level of Japan's foreign strategy.Japan has actively advocated Indo-Pacific Strategy，showing its clear intention of hoping to catch the express train of economic development in the Indo-Pacific region，to balance China，ensure maritime traffic safety and enhance the sense of presence in the Indo-Pacific region .Japan has promoted the“Indo-Pacific Strategy”from the economic and security perspective，through building“Asia-Africa growth Corridor ”，promoting“Comprehensive Progressive Trans—Pacific Partnership”，and establishing Quartet cooperation framework of“Japan-U.S.-Australia-India”.Japan enhances its influence in the Indo-Pacific region by advocating and advancing Indo-Pacific strategy，but it also faces some challenges.