تیراندازی با کمان، تاریخچه کمانداری، اصول و قوانین تیراندازی با کمان، آموزش تیراندازی با کمان، معرفی رشته های ریکرو و کامپوند

[چرو]

The yumi is exceptionally tall,

standing over two meters, and surpassing the height of the archer (ite, 射手). They are traditionally made by laminating bamboo, wood and leather, using techniques which have not changed for centuries, although some archers (particularly beginners) may use a synthetic yumi.

The yumi is asymmetric; According to the All Nippon Kyudo Federation, the grip (nigiri) has to be positioned at about two thirds of the distance from the upper tip.

The yumi, the world's largest bow

The upper and lower curves also differ. Several hypotheses have been offered for this asymmetric shape. Some believe it was designed for use on a horse, where the yumi could be moved from one side of the horse to the other with ease. However, the grip position had emerged before horseback archery became widespread in Japan.

Others claim that asymmetry was needed to enable shooting from a kneeling position. Yet another explanation is the characteristics of the wood from a time before laminating techniques. In case the bow is made from a single piece of wood, its modulus of elasticity is different between the part taken from the treetop side and the other side. A lower grip balances it.

Yet another theory is that the hand holding the yumi experiences less vibration at this point. The points one and two thirds of the distance from the upper tip are the nodes. This makes it easier for the archer to grip the yumi after shooting an arrow