The 「aburidashi」 technique, which involves the shaping of glass in a patterned mold to create opalescent-colored designs in the glass surface, is a classic, old-world glass-making technique that enjoyed widespread popularity in Japan during the Meiji (1868-1912) and Taisho (1912-1926) periods, hence the name—Taisho Roman (ticism). Nowadays, it is rare to find glassware made using this technique, with the exception of select antique glassware shops. By including a certain type of raw material known as “bone ash” to mix in with other required elements, opalescent colors can then be produced by taking advantage of its specific properties through exposure to a temperature gap caused by a process of rapidly heating and cooling the glass at the time of molding. In this way, the 「aburidashi」 technique is able to introduce a variety of artistic patterns into the glass. This is a reason why it remains one of Japan’s unique, traditional handcrafting techniques.