Edo kiriko buttons in 3 colors and 3 cuttings
Edo Kiriko is a glass craft that has been handed down in Tokyo (old name Edo). First of all, an expert glassblower blows clear glass into a paper-thin shape of colored glass and then rotates this in the air to make the overall form. The result is a two-layer structure with colored glass on the outside and clear glass on the inside. By cutting patterns into the outside surface with different kinds of whetstones, a vivid contrast is created between the colored glass and the transparent glass.