Answer:
They are usually named according to the principle weapon you wield. Here are the major Samurai fighting arts:
Sōjutsu - the art of fighting and killing with the spear
Naginatajutsu - the art of fighting and killing with the glaive (naginata)
Kenjutsu - the art of fighting and killing with the sword
Jujutsu- unarmed fighting arts. These are the ancestors of judo and aikido.
this is what i know and i guess i explained it as simple as u can understand
hope this heps u
and ur wecm
:)