Rindo-kan Karate (竜胆館空手?) is a fictional martial art style used by Makoto. There is also a dojo that teaches it, though not many people know of it. Because of this, Makoto fights to show the world how strong the style is.
Rindo-kan Karate bears a resemblance to (and is most likely inspired by) the real-life art of Shotokan karate, much more so than the Ansatsuken fighting style that Ryu, Ken and the other "shoto" fighters use. It is also similar to KyoKushin Karate.