Nintaijutsu
Nintaijutsu (忍体術; Literally meaning "Ninja Body Techniques") is a term used to describe the fighting style used by Ryuu. A combination of ninjutsu and taijutsu, Ryuu uses nintaijutsu by first surrounding himself with his Lightning Release Armor. This augments the strength of his physical attacks, making them even deadlier. His speed and reflexes are also increased. It is unknown if there are other examples of nintaijutsu. This is the main fighting style of Ryuu. He can also utilize his weapons such as Samehada in this state, making their striking speed and power much more powerful.