A bout is won by forcing the opponent out of the inner circle or throwing him in the dohyo. To lose the match it is not necessary to fall in the circle or to be pushed completely out. The wrestler who touches the ground with any part of his body, his knee or even the tip of his finger loses the match. Or he need only put one toe or his heel over the tawara marking the circle. Striking with fists, hair pulling, eye gouging, choking and kicking are prohibited. It is also against the rules to grab the part of the mawashi covering the” vital” organs.