The very name of this stance - the immobile stance - already gives an idea of the areas of application for which the Fudō dachi is suitable: with it as the basis of a technique, a great deal of energy can be unleashed.
The width, the length and the foot position are the same as in the Zenkutsu dachi. The difference is the weight distribution: each leg carries half of the body weight. To achieve this it is necessary to bend the back leg. It should be noted that the rear knee is not held too far to the side, after all, the Fudō dachi acts forward and accordingly the position should be directed forward as well as the entire body.
Fudō dachi is also called Sōchin dachi because the position occurs very often in the master kata Sōchin.
Here you will find all information about the techniques in the video