Ainu swords are used mostly for ceremonial purposes, not for combat, and their blades are very dull. The blades and guards used to come from the surrounding Japanese people, due to the fact that the Ainu had no iron-forging knowledge. It used to be that the Ainu exchanged Ainudama (beads) for the Japanese blades and guards. The Japanese exchaged dull blades with the Ainu so the Ainu wouldn't retaliate with sharp-edge swords for Japan's aggression against them.
These Ainudama are all antique.