Hachimantai Geothermal Steam Dyeing is a uniquely Japanese technique that uses natural geothermal steam from the Matsukawa Geothermal Power Plant—the first of its kind in Japan—to create intricate, multicolored patterns. Developed by artist Kazuyuki Takahashi, this method involves tightly binding fabric, applying blended dye solutions, and steaming it in geothermal cauldrons at 100–150°C. The hydrogen sulfide in the steam reacts with certain dyes, causing subtle gradations and unpredictable effects. Because temperature, steam conditions, and dye placement all vary, each piece is truly one of a kind—an expression of the earth’s energy through color.