Ryuta Fukumura works with hanjiki, a semi-porcelain clay body that falls between earthenware and porcelain. His distinctive silver and iron glazes develop through repeated low-temperature firings in a traditional log-burning noborigama (climbing kiln), revealing atmospheric textures and quiet depth particular to this clay. Over time and with use, the glazes transform, acquiring warmer patinas and a gentle luster.

• Hand wash only with a neutral detergent and a soft sponge or cloth. Avoid abrasive scrubbers, scouring pads, and cleansers. Dry thoroughly before storing to prevent moisture buildup, discoloration, or mold.
• Not microwave safe. Do not use over direct heat, including ovens, gas stoves, or open flame.
• Before first use, or if the piece has not been used for an extended period, soak it in rice water (or plain water) for about one hour to help fill fine pores in the clay and reduce staining.
• Over time, the surface will develop a subdued, antique-like patina, which is part of the character of the work. To restore some of the original silver color, gently clean with a soft sponge and toothpaste containing a mild abrasive.