An ”Asian” approach, together with the concept of ”all under-heaven”, has become popular in Asian Sinology. Hamashita Takeshi, one of the best writers on Asianism, develops a research agenda for regional study, using the Chinese Tributary Trade System as a metaphor. He dissolves the image of nation-states into a complex networking among Asian regions. This ”Asian” approach is believed useful in epistemologically resisting Euro-centrism as well as China-centrism. The paper introduces Hamashita's research and discusses its implications for China studies.