One of Hiryū Kōrin Ryū’s more powerful techniques in that a user can utilize with their legs. It is a vertical kick aimed at the target's defense even when the opponent is attacking and/or defending. Once the practitioner can identify the weakness in the opponent's defense, they must focus all of their physical power and Ryukei Qigong in one single kick. All of this must be done while maintaining their center of balance, which can be a fatal weakness. Should the enemy manage to somehow shift that center of balance; the power of the technique will be reduced severely. However should it be used correctly, then no one will be able to withstand it. It has been documented that the creator of the technique managed to destroy a mountain with a single kick, thus he named it the Mountain Crusher. Whether or not that's true however, is up to speculation.