The development of this weapon goes back as far as the Stone Age. It is said that it was originally used to chase away lions and tigers. This weapon is a stone tied to a palm fiber rope, which can be 90cm, 150cm, 180cm, or 240cm in length. Shorter Suruchin can be used to hit an attacker and Suruchin with a long rope can be swung around and then wrapped around the attacker to bring him down. This martial art was practiced in Okinawa for a long time, and its technique was perfected by the influence of the Chinese martial art "Muchi" (rod art). The technique is also similar to the weapon used in "Ryusei" in Chinese martial arts. Similar weapons are found throughout the world.