Actualy this is a very easy one. Find the nearest AIKODO dojo. It is an art I have spent many years studing. It is based on the Samurai arts and a major part of it is dedicated to dealing with sharpies.
PM me if you need help finding one I live on the chedder curtain and know of many local Dojo's
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PIUS GRADALE MILES MILITIS
I'm really sorry to say this, because I hate the "your martial art sux!" arguments. But out of concern for the original correspondent's life I must strongly argue against almost all of the Aikido I've been involved with or seen for serious self defense against a knife. Their weapons work is almost always execrable. For the stuff against weapons, well the situations they train for against the blade are extremely artificial. A thrust from the hip starting two steps away. A huge, wide looping slash from the same distance. Overhead stabs a la
Psycho.
Add to all of this the typical Aikido attitude towards training. Everything is cooperative and friendly all the time. It's a cardinal sin to resist in training. Ever. To see if your stuff works against a non-compliant attacker you have to pressure test it from time to time against someone who is making a good faith effort to land one on you in a realistic fashion. The Universal Love and Harmony are great in their place. But until you are very,
very, very good it's a lousy way to train for self defense. You need to be able to function when you are stressed and afraid.
I know. I know. "Samurai" "Tokyo Riot Police". Yes. The samurai were great warriors, even if they only ever fought each other. Their weapons were the sword, the bow and the spear, not the short knife except when things had gone irretrievably wahoonie-shaped. The Tokyo Riot Police (cf.
Angry White Pyjamas) are brutalized, yelled at, and worked half to death in training. And they spend a lot of time beating the excrement out of each other for practice.
If you're looking to learn how to use knives or how to defend against them there are much better options. The Filipino traditions come immediately to mind. Groups like The School of the Two Swords, Hock Hockheim's people or any of a number of RBSD types would also be very good bets.
A couple other pieces of curmudgeonly advice:
1) Fixed blades are faster than folders, but folders can definitely be fast enough if you practice a little. They are also much more likely to pass the all-important Police Attitude Test.
2) Styer's book is interesting only for historical purposes. As a knife training manual it's awful and will get you killed. Styer was an apprentice of Biddle who taught knife fencing to the Marines. Eventually he stopped using volunteers from the audience because they consistently beat the hell out of him.
3) If it's bad enough to require a knife forget OC. It beats screaming for help, I suppose, but as a self defense tool against a determined, violent armed criminal? Not even.