Martial arts take various forms.
Akido: The defensive style uses fast movements to turn an attacker's force against him.
Iaido: In its modern application, it involves dull swords.
Judo: A grappling art, it uses throws, arm locks and pins to control an opponent.
Jujitsu, jujutsu: Similar to judo, it involves strikes, kicks, throws, joint locks and choking.