Nowadays, Judo's Rule have been totally renewed by the International Judo Federation (IJF). We can speculate that this New Rules will be renewed again and again for the quite long time. If you couldn't follow the Rules, you'll be immediately disadvantaged. It's hard race. Not only Rules, style of Judo have been changing as well. Color of materials off course, system, environment so on. Changing Judo, who has been leading this movement? Yes, IJF. If you made good idea to develop judo, it should...