Here are some yoshinkan tanto techniques. They are a little dry and boring, but a good basic practice I guess. I am not hot for aiki weapons training that is simply get off the line a stab. Surely we should be using the tools to aid in real energy transference between people. I like weapons work that still breaks the structure of a person down to cause kuzushi. I also like to see flow drills with the weapons work.
This next film is interesting, but not very Aiki. Good to see how a really aggressive knife fighter might attack. This competition gets brutal, but it is still worth a watch.
I think if the fighters had real fear of the weapons the results might be different.