Professionally used in Sushi Resturant. 
Well taken care of. The handle is oiled, no rust or chips in the blade. 
This knife is excellently made. Nicely engraved logos. Well heat treated steel that holds an edge in a professional setting. Handle is beautiful and functional. The tang is well sealed to prevent rust and rotting. 
Custom birch saya was made for this specific knife. The fit is perfect; not tight so it damages the blade, but not enough play for rattles to damage the blade. The handle flows nicely into the back of the saya.