The number of Chinese tourists to Japan soars significantly since the Japanese government launched its new visa policy in 2010. Benefited from it, Chinese visitors skyrocketed to the largest foreign visitors group of Japan since 2015. Except of stimulating Japan’s sluggish economic development, the explosive growth of Chinese visitors in Japan also play a big part in ameliorating Chinese people’s image of Japan. Basing on the public diplomacy theory, we defines the conception and features of Japan’s “tourism diplomacy”, especially those policies toward Chinese. Furthermore, we summarize three types of public diplomacy models, studying their implementation and how these factors contributing to the increasing number of Chinese tourists to Japan in recent years. What is more, this paper identifies the relationship between “the number of Chinese tourists visiting Japan” and “Chinese people’s favorable impression of Japan”, analyzing its contribution to Japan’s domestic economic development and how the interaction of the two factors benefiting Japanese government’s practice of “Local Economic Revitalization” strategy. In the end, basing on the analysis of Japan’s “tourism diplomacy” practice, corresponding suggestions is put forward for China’s public diplomatic strategy from three aspects: pre-preparation, implementation and potential effect, in the view of Chinese new great power diplomacy for better China’s national image.