Kosen judo

[2] Kosen (高専, kōsen) is an abbreviation of kōtō senmon gakkō (高等専門学校), literally 'higher speciality school', and refers to the colleges of technology in Japan that cater for students from age 15 to 20.

However, they differed in that they asserted the right of competitors to enter groundwork however they wished and to remain in it as long as they wanted, as well as perform certain techniques which were forbidden in regular competition.

[5][6] Naturally, this kind of rules allowed to discard tachi-waza and adopt a more tactical style of ne-waza, which was developed profusely under the influence of judoka like Tsunetane Oda and Yaichihyōe Kanemitsu.

[7] It is believed that the popularity of those strategies was the reason why Kodokan changed its competitive ruleset, restricting ground fighting and entries in 1925 and replacing draws for decision victories or yusei-gachi in 1929.

[1][11] Among the seven universities, Kyoto has the highest number of victories at the Nanatei league, counting 22 wins and 3 draws (against Nagoya in 1982 and Tohoku in 1982 and 1983) out of the 66 editions celebrated as of 2017.

At the Nanatei Judo league, universities face off in teams of 20 judoka of any weight class: 13 of ordinary contenders, a captain and a vice-captain, and five replacements in case of injuries or retirements.