In contact sports, such as boxing, rugby, American football, and judo, the risk of cerebral concussion or acute subdural hematoma by head blow, remains in high in Japan. The prognosis of an acute subdural hematoma is very poor and the mortality rate reachs to 55%. Dr. Ryo Uchida of Aichi University of Education investigated the fatalities in school judo classes, and clarified that more than 110 students aged 12 to 17 died as a result of judo accident in Japan. The fatalities is more than five times higher in any other sports. According to the investigation of Kobayashi, in Britain, Germany, Canada, the United States, and Australia, where judo population is larger than Japan, fatal accident in judo could not be found. On the judo community in Japan, the high mortality rate of judo is thought to be caused by underestimation of the danger of “concussion” and too hard drill works. Therefore, All Japan Judo Federration should take measures immediately in order to save a precious young life, because of the government plan that new national curriculum reforms will be required in all junior high school students to practice judo or some other “budo” starting along the 2012 school year.
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