I have read that in Japan there was a general system called jujitsu. However there were hundreds of branches of jujitsu. Most samurai were trained in different branches of jujitsu. Basically any martial artist in Japan had some form of jujitsu training. It was even implemented into some karate-do. They did not specify it as jujitsu inside karate-do.
Anyway I read Kano himself had licences to teach various branches of jujitsu which he later combined and removed the deadly techniques from in order to train at full speed and power. He called this Judo. This license system was before the belt system was created by Kano himself for Judo. No system had a belt ranking before Judo. I think Kano had about five styles he used techniques from. Anyone else heard of this or can confirm about Kano's training before he implemented judo in Japan?