It is a very unique bow in China which shoots a ball instead of an arrow, and it was used in the performance of Sangaku of Tang which was one of the origins of sarugaku (form of theatre popular in Japan during the eleventh to the fourteenth centuries) or for the pleasure of the common people, although it was originally a weapon.
中国のもので非常に珍しく、矢ではなく球を放つ弓で、元は武器であったが、日本の猿楽の起源の一つである唐の散楽の見世物や庶民の遊技として使われた。