Katsuyuki Kondō was born in Tokyo in 1945. He began his training in Daito-ryu Aikijujutsu under one of Takeda Sokaku's leading students, Hosono Tsunejiro, and in 1961 he received the first instruction from Takeda Tokimune at Hosono's dojo.
Later he became student of Yoshida Kotaro, who had been a Representative Instructor (kyoju dairi) under Takeda Sokaku. In July of 1966 Kondo became a direct student of Takeda Tokimune and from that time he began making periodic visits to Hokkaido to learn directly from the Daito-ryu headmaster. He continued his training under Tokimune for thirty-two years.
In 1988, Takeda Tokimune appointed Kondo Katsuyuki, then the head of all Tokyo Daito-ryu Aikibudo Branches, to be both Representative of the Headmaster (soke dairi) and Director of the Overseas Headquarters (kaigai hombucho) in regard to Daito-ryu Aikibudo. That same year, Tokimune granted Kondo the menkyo kaiden (license of full transmission) certificate in Daito-ryu Aikijujutsu, thus formally passing on the Main Line Daito-ryu tradition.