Kodokan is the headquarters of the Judo World. It was established by Jigoro Kano the founder of judo.

Kodokan runs the Kodokan School for those who want to master Judo. The program is authorized as a non regular school by the Tokyo Metropolitan Government . Its courses include the theories and practice of Judo, and matters of general education.

The course is divided into two; a general course for novices, and special courses for those who have completed the general course or its equivalent. In Adult Division, it is planned so as to make one attain the First Dan after finishing three months in the general course and nine months in a special course. The boys Division (co-ed) is open for children over 6 years.