Doesn't matter if it is sharp or not, in safe areas, only a knock-back effect occurs if there is no duel going on. Fujiwara could of cut at Angelo 1000 times with his katana, no damage, just that Angelo would probably feel a dull pain and be sent flying back many times over.

Edit:
Jangel
There is no evasion skill
Three stat points to use in either strength or agility/dexterity
Dodging is a manuel process