Santōka (酸透過, Acid Permeation) is a powerful technique created by Tosen, knowing that anything that his body's cells produce is considered a part of his body, Tosen found a new way of using his devil fruit's ability. These two abilities can be used in many ways, Tosen can form the acid and poison as bubbles, he can shoot them as bullets at high speed, or even give them certain forms such as snakes or dragons.