What does destroying an enemy's blade do (jitte)? Does it have any mechanical impact on the game or is it just narrative?
We interpret this rule as : "if you destroy the ennemy blade with your jitte, you win the fight". Then, as usual, your character my knock or kill the opponent.
That gives some funny scene if both opponents are using jitte and the roll is tie : do all opponents loose their weapon or is the round cancelled. (Maybe the story/context gives some hints)