KUSARI FUNDO NO JUTSU:
Kusari-fundo is a hand held weapon used in feudal Japan consisting of a length of chain (kusari) with a weight (fundo) connected to each end of the chain. Various sizes and shapes of chain and weight were used as there was no set rule on the construction of these weapons. Other popular names are manrikigusari meaning ten thousand power chainor just manriki.
KUSARI (THE CHAIN):
The founder of the Masaki ryū Masaki Tarodayu Dannoshin Toshiyoshi (1689-1776) is said to have developed a version of the kusari-fundo while serving Lord Toda as a bloodless weapon that could be used to defend the grounds of Edo castle.