An Edo Kiriko style tumbler in deep cobalt blue overlay glass, hand-cut to reveal a clear crystal core. The upper band carries a fine asanoha (hemp leaf) star pattern, while the lower half flows into a seigaiha (wave) motif with angular cuts radiating from the base. Branded MASU and presented in a natural wooden box marked 江戸切子, it makes a striking piece for whisky, sake, or display.