Nunchaku was originally designed as a tool that was used to thresh rice (separating the grain from the husk). Its development as a weapon supposedly happened in the 17th century in Japan The modern nunchaku has been modified for use as a weapon and would make relatively ineffective threshing rice.
The nunchaku as a weapon has fired his popularity by Bruce Lee used in the films of the 70s.
Several martial arts use the nunchaku The Taekwondo, has a distinctive Korean style formed at the instruction on how to use one, but two Nunchakus.
In Korea, it is known as Sahng Jeol Bahngs, or sometimes Sahng Jeol Bongs.
