寄鏨 Yosetagane Approach Chisel
What is Yosetagane in Japanese Katana terminology?
This refers to the mark made when the hole for the tang (Nakago) is hammered in to fit closely with the sword blade, in order to prevent any gaps when the guard (Tsuba) is mounted on the sword blade. This process ensures a tight fit between the guard and the blade, which is crucial for the stability and balance of the sword. The mark left by this process is a testament to the meticulous craftsmanship involved in traditional Japanese sword making.