Kanmuri (headwear)
A kanmuri (冠; lit. 'crown') is a type of headwear worn by adult men of the kuge (noble class) and buke (samurai class) in Japan. It was generally made of thin black silk hardened with lacquer, but there was also a metal crown called a raikan that was worn only during the emperor's enthronement ceremony and the chōga ceremony (New Year greeting ceremony).