1960 Sensei Mutsuro Nakazono came to Vietnam to help Sensei Dang Thong Tri to train a carde of instructors.
1964 Sensei Dang Thong Tri resettled in the United States, relinquishing the Vietnam Aikido and Judo Association to Sensei Dang Thong Phong.
1967 Sensei Dang Thong Phong traveled to Hombu Dojo in Japan for additional training, obtaining his 3rd degree black belt in Aikido there.
1967 O'Sensei Morihei Ueshiba and Doshu Kissomaru Ueshiba issued credentials to Sensei Phong, officially sanctioning him to spread Aikido all over the Vietnamese territory in the Spirit of Love and Peace.
1968 Sensei Dang Thong Phong founded the the Aikido Tenshinkai Federation, holding the position of President until today.
1970 Aikido was officially introduced to the school system and the Armed Forces of South Vietnam.
1975 Before the fall of South Vietnam in April 1975, Aikido members in Vietnam numbered over 10,000.
1986 Sensei Phong moved to the United States.
1988 Tenshinkai Aikido Federation was re-born under the name of International Tenshinkai Federation headquartered in Westminster, Orange County, California, USA.
1991 Aikido World Headquarters recognized International Tenshinkai Aikido Federation as an official organization within the Aikikai system, sanctioned to operate in the United States.
1994 Aikido Tenshinkai Association in Vietnam was re-instated by Aikido World Headquarters.
1997 At the ceremony celebrating the 29th anniversary of the founding of International Tenshinkai Aikido Federation on February 20, 1997, in Westminster, California, Shihan Masatake Fujita, on behalf of Doshu Kisshomaru Ueshiba, presented Sensei Dang Thong Phong with the certificate of 6th degree Aikikai Black Belt.
International Tenshinkai Aikido Federation presently has branches in the United States, Vietnam, France and Canada.
1958 Sensei Dang Thong Tri brought Aikido from France to introduce it to Vietnam