Đông Du (Saigon: [ɗəwŋm ju], Hanoi: [ɗəwŋm zu], journey to the east; Japanese: 東遊) was a Vietnamese political movement founded by Phan Bội Châu at the start of the 20th century that encouraged young Vietnamese to go east to Japan to study, in the hope of training a new era of revolutionary independent activists to rise against French colonial rule.
[1] Other notable proponents of Dong Du include Phan Châu Trinh and Prince Cường Để of Nguyễn house.
Yên Thế Insurrection lead by Hoàng Hoa Thám, at the time, had narrowed the scope of operations and fully suppressed in 1913.
Early 1904, after coming back from French Cochinchina, on April 4th, Phan Bội Châu, together with Cường Để (one of the descendants of Prince Nguyễn Phúc Cảnh) and around 20 other nationalists met at Nguyễn Thành's house, located in Quảng Nam to establish Duy Tân Hội, a secret revolutionary movement.
After discussion, the association's founding conference set out three immediate tasks, which were: The above two items were assigned to all members, while the third item was entrusted to Nguyen Thanh and Phan Boi Chau to discuss in secret and then carry it out, without the other members knowing.