Kyoto Prefecture (京都府, Kyōto-fu) is a prefecture of Japan located in the Kansai region of the island of Honshu. The capital is the city of Kyoto. Until the Meiji Restoration, the area of Kyoto Prefecture was known as Yamashiro. For most of its history, the city of Kyoto was the Imperial capital of Japan. The history of the city itself can be traced back as far as the 6th century. In 544, the Aoi Matsuri was held in Kyoto to pray for good harvest and good weather.