The Noh Mask (能面) Monster Wood Carving is a traditional Japanese mask used in Noh theater, a classical form of drama that dates back to the 14th century.
Given that this mask is from the Showa period (1940s and later), it is a post-war piece, likely crafted in the traditional style while carrying elements of modern artistry. Noh masks are handcrafted from wood, typically cypress, and painted with natural pigments. Each mask is designed to represent different emotions, spirits, or supernatural beings.