Kōyasan, also known as Mount Koya, and its surrounds, is a delightful destination to delve into the ancient culture of Japan, and a marvelous UNESCO World Heritage site. Mount Koya is Japan’s most sacred mountain as it is the center of Shingon Buddhism, an important Buddhist sect. Shingon Buddhism was first introduced to Japan in 805 by Kobo Daishi. Kōyasan has since become a pilgrimage place, with over one hundred temples lining the streets. The most important temples are Kongobuji, the head temple, and Okunoin, the mausoleum of Kobo Daishi, and waiting to be explored!