The jitte is a parrying weapon. It is the standard equipment of a dōshin. It consists of a strong steel wand with two curved prongs above the hilt for catching the blade of an opponent's sword.
Sano Ichirō used a jitte to stop Niu Masahito from murdering Tokugawa Tsunayoshi during a battle in Yoshiwara which was instigated by The Conspiracy of Twenty One, who were determined to kill the shogun and take control of Japan. Sano used the jitte to cleave Masahito's skull in two.