1src: https://emuseum.cornell.edu/internal/media/dispatcher/71704/fullTsuba with design of waves and nets18th centuryChoshu73.005.0071871349277Net grill and katakiri wave designs. Katakiri (Cutting to one side) is a form of chiselled engraving resembling brush strokes, in which one side of the V cut is vertical; originated by the Yokoya School. Ordinary engraving of this sort is called kebori.73.005.007_D0523_02973.005.007_D0523_030ChoshuNagato, Of tomotsune