文部科学省グローバルCOEプログラム 関西大学文化交渉学教育研究拠点 東アジアの思想と構造 Normally, we know that Zhang Taiyan is the pioneer of anti-Man nation and an important founder of RPC; however, his idea on building an East-Asia Union has not been known. This article argues that Zhang initiates his theory on the East Asian Union after the Sino-Japanese War in 1894. Zhang actually completed this idea when he was in Taiwan; he escaped to there after the unsuccessful Hundred-Day Reform. In addition, Zhang's idea on building the East Asia Union is showing in his 訄書, and that is different from related desires of Kang Youwei and Sun Yatsen. Therefore, Zhang is not a nationalist; his slogan of anti-Man nation was only a convenient method.