If you want to look at this in more depth and consider the links here, I mention Takagi Yoshin Ryu as having the techniques you later see in Judo and Jujutsu in their original combat form
The point being is, while it's good to look at modern developments - Jujutsu to Judo, and aikido, to Gracie Newaza and back again, keep in mind even the Jujutsu school we refer to are based in koryu ryu that go back centuries
which makes it even more ridiculous when "modern" schools of BJJ, MMA and Krav Maga think they have come across something new that hasn't been around for a thousand years
