Ryote Dori

The following videos show different methods of applying Aiki to initially unbalance Uke when he attacks using Ryote Dori. Each method of applying Aiki is analysed.

Tan suwari waza kokyu ho with variations


Analysis

In this video a number of techniques are demonstrated where Uke attacks by grasping both of Tori's wrists when both are kneeling. As Tori's wrists are simply being held, moving them will induce Uke to momentarily relax her arms to allow her to reposition her body to resist the movement by pulling or pushing. But as Uke relaxes her arms, Tori induces Uke to apply Aiki by rotating his wrists, so that Uke must reverse the muscle torque about of one her joints to remain in contact with Tori's wrists as she pulls or pushes. This action unbalances Uke. For each of the techniques demonstrated the muscle torque that is reversed when Uke pulls or pushes is listed below:-

Neutral Grip - Uke reverses the muscle torque about her waist joint, by bending forward, when she pulls
Grip from Below - Uke reverses the muscle torque about her waist joint, by bending forward, when she pulls
Grip from Above - Uke rotates the muscle torque about her knee joint, by rising, when she pulls
Strong Neutral Grip - Uke reverses the muscle torque about her waist joint, by leaning backwards, when she pushes

Morihiro Saito Sensei. Ryote Dori


Analysis

The techniques demonstrated for the first two minutes of this video all involve Tori stepping to the side of Uke's front leg whilst extending his arm on the same side. This movement of Uke's wrist to the side induces Uke to relax his arms so as to reposition his body to resist this sideways movement by pulling back using the muscle torque about his ankle joint. Uke's arm is therefore extended to the side. 

Whilst Uke's arms are relaxed, Tori crosses over his other arm to grasp Uke's extended arm at the wrist. As Tori crosses his arm over, Uke's wrist holding this arm is then bent backwards. This action induces Uke to apply Aiki by reversing the muscle torque about his ankle joint, in order to retain his grip on Tori's wrist as it crosses over. Consequently, Uke becomes unbalanced as he pulls back.

Morihiro Saito Sensei Ushiro Ryote Dori


Analysis

In the techniques shown in this video Uke restrains Tori's wrists from the rear. Tori bends at the waist to lower his shoulders and hence to lower his wrists. This action induces Uke to push upwards against Tori's wrists. Pushing upwards induces Uke to apply Aiki as he is pulled to the front by Tori causing Uke to become unbalanced to the front. Pushing upwards causes the muscle torque about the ankle joint of Uke's front foot to be in the opposite direction to that required for Uke to resist Tori pulling him to the front.

Aikijutsu Hiden


Analysis

In this video at a time of 8.10 both wrists are being held in the seated position. Aiki is applied to unbalance Uke by Tori bending at the waist to lower his shoulders and wrists to induce Uke to pull upwards/forwards. As Uke pulls, Tori rotates his wrists upwards about his elbows to unbalance Uke as illustrated in diagram of the previous technique.

Highlights of Daito-ryu Aikijujutsu instructional video by Katsuyuki Kondo, Menkyo Kaiden


Analysis

At a time of 1.43 Uke comes to grab Tori's wrists. Tori moves his wrists forward to induce Uke to place his leading foot on the ground. Tori then induces Uke to apply Aiki, to unbalance Uke, by withdrawing his wrists, just as Uke is closing his grip. This action induces Uke to reverse the muscle torque about the ankle joint of his leading leg so that he can follow Tori's wrists and grab them. Uke is then unbalanced by his forward momentum.