Sakan (左官) refers to the plasterwork of Japan.
It flourished during the Edo period[1][2] (1603-1868) and continues to be practiced in the present day.
Recently, Japanese artists have been creating modern interpretations of sakan plasterwork as a form of art.
[3][4] Traditionally, earth, lime, plant fibers, sands and aggregates are the most common constituents in Japanese plaster.
[1] Plaster can survive both moisture and extremely dry environments, making it an ideal material for Japan, where the humidity levels vary greatly throughout the year.