Kusarigama (a chain and a sickle) is a weapon that has a form like a kama (a sickle) for cutting grass attached to a chain weight and it was developed as a weapon from a farming tool.
鎖鎌（くさりがま）とは、草刈り鎌に鎖分銅を取付けた様な形をした武器で、農耕具を武器として発展させた物である。