It is a part of traditional Japanese samurai culture, often associated with Noh drama and warrior battle scenes. These masks typically depict images of ghosts or evil spirits, playing important roles in traditional Japanese theatrical art. One of the most famous ghost masks is the "Prajna" mask, which symbolizes jealous and resentful female monsters, transformed into ghosts due to jealousy. The production of masks is very particular, usually carved from wood and colored, and this process is called "face slapping". These masks are an important part of Japanese culture and history, reflecting the Japanese people's reverence for supernatural phenomena and their unique pursuit of beauty.