Education
Nihon University.
高木 長之助
Nihon University.
Takagi is from Shirahama, Chiba and began judo when he was in junior high school. Takagi began working for the Tokyo Metropolitan Police Department after graduation from Nihon University in 1971. As of 2011, Takagi coaches judo at his alma mater, Nihon University.
Among his students are June Konno, Michiaki Kamochi, Makoto Takimoto and others
1970 – All-Japan Weight Class Championships (Heavyweight) 1st.
1970 – All-Japan Weight Class Championships (Heavyweight) 1st 1972 – All-Japan Weight Class Championships (Heavyweight) 2nd 1973 - World Championships (Heavyweight) 1st - All-Japan Championships (Openweight only) 2nd 1975 - World Championships (Heavyweight) 3rd - All-Japan Championships (Openweight only) 2nd 1976 - All-Japan Championships (Openweight only) 3rd 1977 - All-Japan Championships (Openweight only) 3rd 1978 – Jigoro Kano Cup (Heavyweight) 3rd - All-Japan Championships (Openweight only) 2nd 1980 –All-Japan Weight Class Championships (Heavyweight) 3rd.
When he was a member of judo club at Awa high-school (安房高校, Awa Kōkō), the senior of club is Masatoshi Shinomaki.