Mirror inscribed with the date A.D. 239

Important cultural property. At the outer edge where we can observe an icon of deities and mythical beasts, 41 Chinese characters representing the year have been cast. There are only two known discoveries of bronze mirrors that have Chinese characters representing the name of Chinese year, which is the year 239, when Himiko, shaman of Yamatai-Koku kingdom, sent her representatives to ancient China, once known as Gi, and received 100 mirrors.