In recent years, ¡§China as an emerging superpower¡¨ becomes popular discussion issue, Japan as the neighboring country also makes response to this. However, Japan-China relation was not only the simple relations of country to country; two countries were influenced by Confucian culture very deep in history, having the complicated emotion each other. This topic of this article is the Japan academic circle how to think and regard China in epistemology and methodology form modern times to now. This article orders the Japanese scholars in modern times how to regard China in first, then using the train of thought to conjecture the visions that contemporary Japan face ¡§China as an emerging superpower¡¨. Finally, the author compares Japan academic circle how to regard China to find out those thought communicates or joins during that time.