横四方固 Yoko-shiho-gatame (side-locking four corner hold) YSG

A hold-down. From your opponent’s right side, lean over him at a right angle and hold him down on his back with your body. Grip the belt with your left arm, under his left shoulder and pass your right arm between his legs to grip his trousers, then use your chest to pin him with weight of your body, anchored at his four corners.