Kiriko Black Glass Sake Cup

Kiriko is a type of traditional Japanese glassware known for its intricate patterns and craftsmanship. Originating in the Edo period (1603-1868), Kiriko glassware is characterized by its delicate etching, cutting, and engraving techniques. The designs typically feature geometric patterns, floral motifs, or scenes from nature.

切 - Kiri >> means to cut. This Kanji expresses the method of craving patterns on surfaces of glass.
子 - Ko >> traditionally used for mentioning containers.