I have practiced Isshin-ryu for 12 years, and judo for 6. Isshin-ryu was founded in 1956 by Grandmaster Tatsuo Shimabuku and a synthesis of Shorin-ryu, Goju-ryu, and Kobudo. It emphasizes short natural stances, with basic striking, blocking, and kicking techniques. It will pick a good solid (vertical) reverse punch over anything fancy! Judo was founded in 1882 by Prof. Jigoro Kano. Judoka follow the mantra seiryoku zenyo - maximum efficient use of strength and Jita kyoei - mutual benefit and welfare it is comprised of throwing techniques and grappling techniques. It's all about knowing when and where to put just the right amount force into a technique!