Ok, another pet peave here.
Just because a weapon is wooden, does not mean it is not a real weapon.
Is a knife or katana sharper than a wooden tano or bokken, yes. All four can kill, weilded corectly, or even poorly when luck is right. As for jo staff, a good person with the jo can break a steel weapon. Yes, it depends on a lot of factors, but don't assume wood is not a "real" weapon.
Ok, enough said.