How do you disarm a sword?
You mean muto dori?
What about sword vs. sword.
Grab a sword and cut…
This is the point on the sword, based on the type and length of the sword, the grip, and the movement of the person where it is weak- this is a kyusho on the sword.
Take it at this point and you can remove it.
We think of just people having kyusho, weapons have them also.
Muto dori with a sword.
Trying to take the sword at any other point is difficult, possible reverting to strength or extra steps.
Move on the kyusho of the sword and it easily is taken away.