Koya, a sacred site of Shingon esoteric Buddhism, stretches over a mountainous upper basin surrounded by peaks about 1,000 meters above sea level, and was founded 1,200 years ago by Kobo Daishi, Kukai (774-835).
On July 7, 2004, the Koyasan pilgrimage routes, including the Choishimichi and Kongobuji Temple precincts (6 districts) and 12 structures, were registered as a UNESCO World Heritage Site along with Kumano, Yoshino, and Omine as “Sacred Sites and Pilgrimage Routes in the Kii Mountain Range”.
Furthermore, on October 24, 2016, Kurokawa-do, Nyonin-do, Kyodaisaka-do Fudosaka, and Mitasaka (including Niu Shuden Shrine) were additionally registered as World Heritage sites as Koya Pilgrimage Routes (including Choishimichi and renamed).