Core Kyoto Season 13 Episode 5 Raden: The Iridescent Beauty of Mother-of-Pearl Inlay ( Air Date 2025-04-10 ) Genre Documentary category. Overview "Raden, a decorative lacquerware technique, uses the glimmering inner layer of shells. The inlay appears to float resplendently on the black lacquer, inspiring artisans to take the art into the future.".