Mount Koya, or Koyasan, is a sacred mountain located in Wakayama Prefecture, Japan. It is the center of the Shingon school of Buddhism, founded by Kōbō Daishi (also known as Kōbō Daishi). The mountain is home to over 100 temples, including the famous Okunoin, which houses the mausoleum of Kōbō Daishi. Visitors to Mount Koya can experience its serene atmosphere, beautiful landscapes, and rich spiritual heritage. The area is accessible by cable car and offers various accommodations, including traditional shukubo (temple lodgings), where guests can enjoy vegetarian meals and participate in morning prayers.