DVD Okinawan Karate & Kobudo Legends - Hojo Undo Supplementary Training, 32 min. One of the facinating things of Okinawan karate is their unique Hojo Undo training. Translated it means Supplementary exercises. These specialy designed exercises include Makiwara, Chi ishi, Nigiri Game, Ishi Sashi, Jari Bako, Makiage Kigu, and Kongo ken. These exercises are used to improve the muscles used in the actual karatetechniques. Many of these may seem redundent with the advent of modern day weight training but the mobility that can be used with these rather then the stationary modern day equipment is what makes them of such great value.