As written, quite some rule mechanisms work on an attack without requiring a hit. I am not convinced that that was always intended.
We talked about the Cut Off the Head objective in Mass battles. But there are many examples:
- While spending 2 opportunities to produce a critical hit requires that you hit first, a snaring weapon can immobilize without hitting.
- Various kata produce effects when you spend opportunities, e.g. Breath of Wind (Disoriented) or Disappearing World (Dazed).
- Katana of Fire with one opportunity will possibly set targets on fire after you perform an attack action, not only after you hit with one.
- Fury of Osano-wo with one opportunity requires a check from eveyone within 2 range bands of the target or will make them Dazed and deal Strife equal to 3x your Fire ring.
Do you allow all those to work without hitting? On weapon qualities and opportunity uses from kata, I would expect those to be intended to work this way.
But e.g. with Fury of Osano-wo, the effect of 9 - 12 Strife per enemy in range plus Dazed with a TN of effectively 0 (you only need an opportunity, no successes) seems a bit off, even if I include the fact that you often would hit comrades as well.