Uchikomi (striking) training method Attach a comic magazine to a tightly stretched bicycle inner tube and strike it hard with a wooden sword. The important thing is that the wooden sword doesn’t bounce back. In the past, we used coarse rope. However, over 60 years ago, everyone except Tenshin Sensei stopped practicing, and since there were no other training partners, Ishii Sensei taught us a method using rubber as a way to train alone. In Tenshin-ryu, straining is not allowed. Only by relaxing t