This is the version of Sumi (the black) lines on Kuro-tamenuri body. Carve the Housouge motif by the Chinkin technique unique to Wajima. And using charcoal powders instead of gold powder.
Housouge is an imaginary flower which blooms in the heaven.
The same as the "Palmet", it is said that the most popular flower pattern which is one of the representative arabesque pattern in ancient China and Japan.
"Housouge" is used for the stringed instrument housed in Shosoin(正倉院) of Nara as an auspicious omen motif.