Hand Seal

Hand seals, also called hand signs, are used to create all forms of ninjutsu and genjutsu. There are different hand signs for every different techniques. While techniques may require a number of hand signs to work, a skilled ninja can use less or even one to preform the same technique. And example of this is the Water Release: Water Dragon Blast Technique, which needs a total of 44 hand signs to work. The Second Hokage however just needed to use one hand sign to complete the technique, a testament to his skill.