Jittejutsu

 is the Japanese martial art of using the Japanese weapon "jitte" (also known as "jutte" in English-language sources). Jittejutsu was evolved mainly for the law enforcement officers of the Edo period to enable non-lethal disarmament and apprehension of criminals who were usually carrying a sword. Besides the use of striking an assailant on the head, wrists, hands and arms like that of a baton, the "jitte" can also be used for blocking, deflecting and grappling a sword in the hands of a skilled user. 
There are several schools of jittejutsu today and various "jitte" influences and techniques are featured in several martial arts. 