To preserve the beauty of the Aizu paulownia wood's texture while achieving a color that changes over time, the lacquer was applied by Yushin Sakane, a specialist in "Kijiro lacquer." Kijiro lacquer, which has a heavy, subdued luster, is the most advanced lacquer technique, and is the work of Yushin Sakane, who has devoted himself to studying Joboji lacquer (Iwate) for many years.