A traditional craftsman in Sakai, Osaka, uses an advanced technique, water cooling to achieve a higher hardness for a single piece of steel similar to Japanese swords called Honyaki being not deformable over time. The surface is a mirror finish with a beautiful shine, and it is a rare gem that expresses Mt. Fuji with ripples.
(Note: Water buffaloes may vary in appearance due to individual differences from the image.)
Handle/Ebony, Water buffalo