This video depicts ancient samurai reenactment battles. It also clearly demonstrates where Judo is correct over “Jiu Jitsu“ or BJJ in that it is not about the ground work that is important IE Guards, sweeps, submissions or wrestling. The main emphasis was the slam or “Ippon“ for the warriors were armored and a slam would have amplified the force. The person that was Judo thrown or Ipponed would be stunned after the slam and would then be pinned down (Oseikomiwaza) and finished off with a short sword (Wakizaka) stab. That was what real Jujitsu emphasized in the unarmed part of their combat. Otherwise it was all about the sword or the spear. A little history lesson for anyone that wants to doubt why and how “JUDO“ is the founder of everything “Jiu Jitsu“ related. Did it evolve from “Jujitsu“? Of course but Jujitsu is a broader term then what “Jiu Jitsu“ would have you believe. The Jiu Jitsu we play nowadays is a direct descendant of the reformulated unarmed combat version of the Jujitsu art known as JUDO. It is Judo that introduced Randori or “rolling“ practices instead of just pre choreographed and rehearsed movements. To learn more look up the history and influences of “Kano Jiu Jitsu“