Kongō Sanmai-in

Mount Kōya (高野山, Kōya-san) is a large temple settlement in Wakayama Prefecture, Japan to the south of Osaka. In the strictest sense, Mount Kōya is the mountain name (sangō) of Kongōbu-ji Temple, the ecclesiastical headquarters of the Kōyasan sect of Shingon Buddhism.

Koyasan University (高野山大学, Kōyasan daigaku) is a private university in Mount Kōya, Wakayama Prefecture, Japan. The predecessor of the school was established in 1886 as a monastic school for Shingon Buddhist monks, and it was chartered as a university in 1926. In addition to its main campus, Koyasan University also operates a satellite school for working adults in Osaka.

Kongōbu-ji (金剛峯寺) is the ecclesiastic head temple of Kōyasan Shingon Buddhism, located on Mount Kōya (高野山, Kōya-san), Wakayama Prefecture, Japan. Its name means Temple of the Diamond Mountain Peak. It is part of the "Sacred Sites and Pilgrimage Routes in the Kii Mountain Range" UNESCO World Heritage Site. The temple was first constructed as Seigan-ji Temple in 1593 by Toyotomi Hideyoshi on the death of his mother, rebuilt in 1861, and given its present name in 1869. It contains many sliding screen doors painted by Kanō Tanyū (1602-1674) and members of the Kyoto Kanō school. The temple's modern Banryūtei (蟠龍庭 rock garden) is Japan's largest (2340 square meters), with 140 granite stones arranged to suggest a pair of dragons emerging from clouds to protect the temple. The 414th abbot of Kongōbu-ji is the Reverend Kogi Kasai, who also acts as the archbishop of the Kōyasan Shingon school. At the temple, visitors can listen to the sermons of the monks and participate in ajikan meditation sessions. The term ajikan refers to a fundamental breathing and meditation method of Shingon Buddhism: "meditating on the letter A" written using the Siddhaṃ alphabet.

Muryōkōin (無量光院) is a temple of Koyasan Shingon Buddhism, located on Mount Kōya (高野山, Kōya-san), Wakayama prefecture, Japan. Its name means "Temple of limitless light" and is the Japanese transliteration of Amitābha. The temple was first constructed during the Heian period by Prince Kakuhō Shinō (覚法法親王; 1092-1153), a son of Emperor Shirakawa (白河天皇; 1053-1129; r. 1073-1087). The exact year is unknown. After the devastating fire in 1888 on Mount Kōya (高野山, Kōya-san), the temple was united with Shicchin (悉地院) and relocated to its current location.

Kōyasan Reihōkan (高野山　霊宝館; lit. "Kōyasan Museum of Sacred Treasures") is an art museum on Kōya-san, Wakayama Prefecture, Japan, preserving and displaying Buddhist art owned by temples on Kōya-san. The collection is centered around articles from the Heian and Kamakura periods and includes paintings, calligraphy, sutras, sculpture and Buddhist ritual objects. Among these are a set of the complete Buddhist canon (issaikyō), writings of Kūkai and Minamoto no Yoritomo, founder of the Kamakura Shogunate, mandalas and portraits of priests. The most valuable objects have been designated as National Treasure or Important Cultural Property.

Kōya (高野町, Kōya-chō) is a town located in Ito District, Wakayama Prefecture, Japan. As of 30 November 2021, the town had an estimated population of 2,812, in 1,575 households. It had a population density of 21 persons per km2. The total area of the town is 137.03 square kilometres (52.91 sq mi). The town is known as the headquarters of the Shingon sect of Japanese Buddhism.

Okunoin or Oku-no-in (Japanese: 奥之院, lit. 'inner sanctuary') is a sacred Buddhist site and cemetery on Mount Kōya, in Wakayama Prefecture, Japan. Opened in 835, it houses the mausoleum of Kūkai, founder of the Shingon school of esoteric Buddhism. It is considered the largest cemetery in Japan, with more than two hundred thousand graves and memorial monuments.

Kōyasan Station (高野山駅, Kōyasan-eki) is a passenger railway station in the town of Kōya, Ito District, Wakayama Prefecture, Japan, operated by the private railway company Nankai Electric Railway.

Gokurakubashi Station (極楽橋駅, Gokurakubashi-eki) is a junction passenger railway station in located in the town of Kōya, Wakayama Prefecture, Japan, operated by the private railway company Nankai Electric Railway.

Kii-Kamiya Station (紀伊神谷駅, Kii-Kamiya-eki) is a passenger railway station in the town of Kōya, Ito District, Wakayama Prefecture, Japan, operated by the private railway company Nankai Electric Railway.

Kii-Hosokawa Station (紀伊細川駅, Kii-Hosokawa-eki) is a passenger railway station in the town of Kōya, Ito District, Wakayama Prefecture, Japan, operated by the private railway company Nankai Electric Railway.

Kami-Kosawa Station (上古沢駅, Kami-Kosawa-eki) is a passenger railway station in the town of Kudoyama, Ito District, Wakayama Prefecture, Japan, operated by the private railway company Nankai Electric Railway.