Traditional Japanese Ju-Jutsu was (and still is) very weapons focussed and assumes that every opponent could be armed. This is reflected in how the techniques are applied. Even hardcore Brazilian Jiu-Jitsu practitioners can learn something from the traditional approach to grappling. Full podcast with Alex Kask on this topic here: https://itunes.apple.com/ca/podcast/strenuous-life-podcast-stephan-kesting-grapplearts/id320705565?mt=2&i=1000399556940.
Thanks to Alex Kask from http://shofukan.ca/ for sharing this with us