This is a used item. I watched it about twice and then stored it in its case, so I think the disc condition is good. [Overview] This DVD is about KUDO of Daido Juku, and introduces advanced combat techniques by athletes representing Daido Juku, such as Susumu Yamazaki, Kazuto Sasazawa, and Yasumichi Fujimatsu, as well as basic striking techniques and special offense and defense by Dojo Headmaster Takashi Azuma. It is a very valuable educational material for those interested in martial arts and combat sports.