In 1905, Chau went to Japan, where he sought military aid from Japanese and Chinese revolutionaries for Vietnamese cause, however, they criticized him for his idea of resorting to armed uprising and urged on him the importance of human resource development.
1905年、チャウは日本に渡って武器援助を仰ごうとしたが、武装蜂起の考え方を批判され、代わって人材育成の重要性を説かれた。