With ukete (受け手) standing straight, her bent arm facing to the side or to the front, pulling her forearm while she offers resistance will be difficult. This is a typical "strongest man wins" situation.

For bakushi (縛師, "rigger") to gain the upper hand he needs to bring ukete's arm into a diagonal (angled) position in relation to the body.

Alternatively, bakushi could position himself diagonally to ukete.

The main principle is to find triangles and figure out the pivot points.

For example, if both shoulders are part of a triangle the third corner point (the wrists) is the one that can by moved. The two shoulder points are basically locked and immovable within the triangle.

Watch the video clips to see how it works in action.

The power of locked joints

In an arm stretched sideways you will have the wrist, elbow, and shoulder joints. Take the thumb facing upwards as the base point. By slowly rotating the palm clockwise or anticlockwise the shoulders can be manipulated in such a way that ukete (受け手) will lose balance and either fall forward or backward.

The power of moving your body

Properly positioning yourself in relation to ukete can be a complete game changer. Be prepared to reposition yourself to change the power dynamics to your advantage.

Likewise, moving your body while remaining stationary can be a powerful tool.

Exercises

To get the hang of it you would want to exercise. There are several basic elements: 1) Becoming adept at developing a vision for triangles. 2) Discovering the angles and corners within triangles that can be moved. 3) Avoiding strength. Generally speaking, if you need strength to do a technique you are doing it wrong. 4) Communication! Keep your sensors out to detect the subtle signals emanating from ukete.

Watch the video clips to see how it works in action.