I DO have to point out for everybody that Ju-Jitsu is actually​ a traditional Japanese​ self-defense system developed for the samurai. Ju-Jitsu was supposed to be used if the samurai​ would lose his/her​ weapon and was fairly effective against armored opponents because of its​ focus on throws, locks, ​and strangulation. Ju-Jitsu is the forebear of Judo and some styles of Karate. The Brazillian school of Ju-Jitsu is the more popular one today and is focused on the "Ne-Waza" elements (grappling) of traditional Ju-Jitsu. Peace!