The kunai is a multifunctional implement of Japanese origin used in various applications. Originally, it was a farming tool adapted for use as a weapon by shinobi. Their design includes a sharp blade at one end and a sturdy handle at the other, often with a ring for holding or hanging. Ninjas used the kunai for digging, climbing, leverage and as a close attack weapon, both for stabbing and throwing. It was also used to pry locks or as an improvised anchor. Its versatility made it an essential element of the ninja arsenal.