During the years between 1900 and 1950, Japanese universities created a variation on Kodokan judo known as Kosen judo. The style of jiu-jitsu guards used in Kosen judo tournaments from 1952 is much different than the traditional form of judo because they involve more ground-based fighting techniques known as ne-waza.
Seven major Japanese colleges continue to practice Kosen judo. The yearly tournaments are known as nanatei or shichitei judo. They take place at universities in Tokyo, Hokkaido, Kyoto, Osaka, Tohoku, Kyushu and Nagoya.
Old films of Kosen judo display competitors using X, Spider and De La Riva guards. The techniques closely resemble Brazilian jiu-jitsu guards, especially in a 1952 recording from the Nagoya university. Such practices are an integral part of nanatei judo.
Although today’s fighters frequently think techniques such as Spider and X guard were developed for BJJ.
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