Koyasan (高野山), or Mt. Koya, is one of the top Buddhist Sacred Place and most holy city in Japan. It is located in Northern Wakayama Prefecture. This 820m tall mountain was established by Priest Kukai, or Kobo Daishi, in 816. As Kongobuji temple as the center, there are 117 temples in this town. The tradition of Shingon Buddhism is still continued today. This sacred Town of Buddhism is registered as the UNESCO World Heritage site. There are many historic sits and national treasures of Japan.