The defensive technique accompanying for the lower area deflects the attacks arriving at the gedan level in the opposite direction of the gedan barai.
In the Gedan nagashi uke, no particular position is preferred. Depending on the situation, the defense is mainly executed in Zenkutsu dachi, Kōkutsu dachi or even Fudō dachi. Gedan nagashi uke does not appear in the kata. However, it is a popular defensive technique in combat because it can be used instinctively. It is often used to ward off mae geri.
Here you will find all information about the techniques in the video