The benkan (冕冠; lit. 'crown') is a type of crown traditionally worn by Japanese emperors and crown princes. It is also called tama no kōburi (玉乃冠; lit. 'jeweled crown').
In ancient Japan, emperors and nobles wore metal crowns made of gold, silver, and gilt bronze, influenced by the Korean peninsula. In the 8th century, emperors and crown princes began to wear benkan with chains attached to the metal crown, influenced by the Chinese mianguan. In addition, a sun-shaped ornament was added to the top of the benkan, creating a uniquely Japanese style of crown.