A black and white tsuba is a sword guard designed around high-contrast tonal pairing - typically a dark iron or alloy base set against inlaid, etched, or open-worked motifs that read as white or silver-toned. Common approaches include pierced negative-space designs (sukashi), where the cutout pattern creates light-against-dark geometry, and applied silver or white-metal overlays on a blackened iron ground. In this collection, floral cutwork guards and scrollwork designs follow this visual principle, making them a natural complement to black lacquer sayas. The contrast is not merely decorative - it reflects a deliberate aesthetic tradition in Japanese fittings that used opposing tones to guide the eye and signal a maker's regional style.