Quote Originally Posted by JCoyote
Yes but that is because of damage and destruction to the blades, not damage to the arm or wrist of the user.

And blocking and stopping blades with other blades is certainly not without precedent either. I'd think someone taking the name Musashi would know that.
Actually katana are particularly poor for attempting to directly block an attack. But my point was that either the sword is broken or one person will likely be disarmed because the force, directed straight to your hand, is too much for your fingers to keep their grip.

A shield is buckled to your arm. Instead of losing your grip, the force is sent into your arm, and yes, you will likely have it broken if the force of the blow is from a heavy weapon designed to stave in platemail like a heavy waraxe or mace or hammer.