Kusarigama

The kusarigama is a traditional Japanese weapon that consists of a kama on a kusari-fundo – a type of metal chain (kusari) with a heavy iron weight (fundo) at the end. The kusarigama is said to have developed during the Muromachi period. The art of handling the kusarigama is called kusarigamajutsu.

Overview
This is a sickle with a weighted chain. you've probably seen them in Ninja vi&. The basic idea is to tangle the foe's weapon with the chain, and cut them with the sickle. of course, you can just hit them with the chain, or just swing the sickle. It has two types of damage, AP for the blade, and normal for the weighted chain.

Style: Ninjutsu

Reference
PASQUARETTE, C. "Pacific Rim Sourcebook". 1st ed. Berkeley CA: R. Talsorian Games, 1994