Kanō Jigorō
In the long feudal period governed by the samurai class, some methods that were used to train warriors were developed into well-ordered martial arts, in modern times referred to collectively as . Examples include , and sumo, all of which were established in the Edo period. After the rapid social change in the Meiji Restoration, some martial arts changed into modern sports, called . Judo was developed by Kanō Jigorō, who studied some sects of jujutsu. These sports are still widely practiced in present-day Japan and other countries.