Kyoketsu-shogi

The kyoketsu-shogi is eiore of a tool than a weapon, but can be used to attack an opponent without great di fficulty. Popular among ninja and other criminals, this weapon is a metal grappling hook attached to length of chain or, more frequently, a silken rope. The other end of the rope is weighted to hold it steady while someone climbs the rope to whatever target the grappling hook has been secured to.