Who invented Ju-Jitsu?

Answer 1

Nobody knows the exact origin but it was invented as a fighting method against enemies like the samurai who wore armor which made swards ineffective so the art was invented to kill break and destroy the body, it was invented in Japan around 5000 years ago.

Answer 2

No one person invented it. Jujitsu evolved among the samurai of feudal Japan as a method for defeating an armed and armored opponent without weapons.