The Manriki-gusari is a Japanese combat tool, composed of a flexible chain with weights at its ends. These weights, called 'kusari', can be steel balls or more elaborate pieces. Skilled practitioners employ the Manriki-gusari for quick, precise attacks, taking advantage of its versatility and ability to entangle opponents. Although initially used by samurai and shinobi, the Manriki-gusari was also adopted by police and bodyguards in Japanese history. Its compact design and ability to surprise opponents make it a distinctive and effective weapon in close combat.