The name of this double fist technique comes from a Japanese character that resembles a mountain. It simultaneously hits the lower Chūdan area and Jōdan. The front arm is thrust straight forward into the Chūdan area, (it is basically an ura zuki). The rear arm describes an elliptical line and hits the Jōdan area with the back of the hand turned upward. The upper body is tilted forward until it is in a straight line with the back leg. This unusual upper body posture is used to dodge when the opponent attacks Jōdan, while the defender uses the upper arm to guide the attack upward and counter at the same time.

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