About Grandmaster Im Mok Chang (from Wikipedia) - Grand Patriarch Jang Im Mok (born 15 August 1912) of Taegue City, who also trained under Takeda Sokaku's lineage, returned to Taegue City, Korea in 1945, like Grand Patriarch Choi Yong-Sul. He was a doctor of oriental medicine and taught his Aikijitsu as Hapkido. Dr Jang-in Mok learned the Dae Dong Ryu Yu Sul Hapkido from his teacher Masuta Yutaka and his teacher Takeda Sokaku in Japan. Choi Yong-sool trained many students, but Jang In Mok only trained a few. He had notable students such as Han-young Choi (Chun Ki Do), Jang Seeung Ho, Song Joon Hwi, Hu Il Wong (teacher of Peter and Joseph Kim from the Australian Hapkido Association), and Song Il Hun. The Dae Don Ryu Sul system was introduced to Korea in 1960 by him. The first time he learned martial arts was in Japan, where he learned Daito-ryu Jujisu in September 1928. He received his certificate in 1935 from Masuta Yutaka, a student of Takeda Sodaku.
About Grandmaster Im Mok Chang (from Wikipedia) - Grand Patriarch Jang Im Mok (born 15 August 1912) of Taegue City, who also trained under Takeda Sokaku's lineage, returned to Taegue City, Korea in 1945, like Grand Patriarch Choi Yong-Sul. He was a doctor of oriental medicine and taught his Aikijitsu as Hapkido. Dr Jang-in Mok learned the Dae Dong Ryu Yu Sul Hapkido from his teacher Masuta Yutaka and his teacher Takeda Sokaku in Japan. Choi Yong-sool trained many students, but Jang In Mok only trained a few. He had notable students such as Han-young Choi (Chun Ki Do), Jang Seeung Ho, Song Joon Hwi, Hu Il Wong (teacher of Peter and Joseph Kim from the Australian Hapkido Association), and Song Il Hun. The Dae Don Ryu Sul system was introduced to Korea in 1960 by him. The first time he learned martial arts was in Japan, where he learned Daito-ryu Jujisu in September 1928. He received his certificate in 1935 from Masuta Yutaka, a student of Takeda Sodaku.