A kenama (けん玉 or 剣玉 or 拳玉) is a Japanese toy that consists of a hammer-like object with a ball connected to it by a string. The ball (called the tama) has a hole in it, and it rests on a spike (the ken) on the top of the kendama. The two sides of the "hammer" are concave dishes; one is smaller than the other. The larger side is called the oozara (large dish,大皿) and the other is the kozara (small dish,小皿).There is also a middle position dish at the bottom of the handle called the chuzara (smallest , middle position dish,中皿) and toughest to play with than the other two dishes.