What is Kempo Jitsu ?

Well The word Kempo means "Fist Law," Jitsu meaning  the image of a style and art form. Essentially something taken to its highest level.

Historically speaking, Kempo first came into existence in Japan during the Edo  period, which started roughly around 1600. Schools of Jujutsu that combined  their art with Chinese Chuan Fa would come to call themselves KempoJu-Jitsu  this was originally a Japanese Martial Art that began with the training of the  Samurai Warriors to defend themselves on the battlefields of feudal Japan.  Using the sword (Katana) and other weapons, on foot and on horseback dressed  in full armour made from bamboo, the Samurai went to war. The Art of Ju Jitsu  was taught separately, and was to be used if the Samurai was unhorsed, and had  lost his weapons. Unarmed, the Samurai would still be in a position to defend  himself against both armed, or unarmed enemy. The aim was the same as with  unarmed combat skills today; maim, incapacitate or kill the attacker and  escape to fight again.