Raden
Luodian (螺钿) in Chinese or Raden (螺鈿) in Japanese for one of the decorative techniques used in traditional crafts and woodwork. It refers to a method of inserting nacre into a carved surface of lacquer or wood. The basic technique of atsugai raden originated around 3500 years ago in Egypt and later spread along the Mediterranean coast. It was subsequently introduced to Japan from the Tang dynasty during the Nara period.
The term may also be used for similar traditional work from Korea called najeonchilgi (螺鈿漆器), from China called luodian (Chinese: 螺钿), from Vietnam called khảm xà cừ (chữ Nôm: 坎𤥭璖), and for modern work done in the West.