Koyasan is the name of an area located in Koya-cho, Ito-gun, Wakayama Prefecture. The town spreads across a mountain basin at an altitude of about 800m, surrounded by mountains of about 1,000m. Although it is called "Koya" "san" (mountain), it is not a mountain in the geographical sense. Koyasan is called "Ichizan Keidaichi," meaning that the entire Koyasan area is considered temple grounds. It is a town that developed within the temple grounds, and originally, the entire Koyasan and Kongobu-ji Temple were synonymous. It is one of the sacred sites in Japanese Buddhism, opened in 816 AD by Kobo Daishi (Kukai) after being granted by Emperor Saga as a training ground for ascetic practices. Koyasan is mainly divided into three areas: "Danjo Garan," "Kongobu-ji Temple," and "Okunoin." "Danjo Garan" is the fundamental training ground of Shingon Esoteric Buddhism, founded by Kobo Daishi Kukai. Many halls stand side by side, and many Buddha statues are enshrined. "Kongobu-ji Temple" is the head temple of the Koyasan Shingon sect, where ceremonies and religious services are held. "Okunoin" is the center of Kobo Daishi's faith. The approach to the mausoleum, where the Great Master is enshrined, is covered with thousand-year-old cedar trees, and many memorial towers stand in a row. In July 2004, the Koyasan Choishimichi and the grounds of Kongobu-ji Temple, along with 12 buildings, were registered as a UNESCO World Heritage Site as "Sacred Sites and Pilgrimage Routes in the Kii Mountain Range," along with Kumano and Yoshino/Omine. The following two items are provided: 1. Goshuin (Temple Stamp) (Nyonindo: Dainichi Nyorai) 2. Yuisyo-sho (History Booklet) (Bifold) <Nyonindo (Women's Hall)> One of the seven entrances to Koya, the only remaining Nyonindo is located at Fudo-guchi. In the past, Nyonindo existed at all seven entrances. During the time when Koyasan was forbidden to women, it was a place where women chanted Shingon mantras all night long. There was a women's path around the outer perimeter of Koyasan, and it is said that women visited, going from peak to peak, and praying with their hands clasped towards Danjo Garan and Okunoin, which could be glimpsed through the trees. After the ban on women was lifted in the Meiji era, it was used as a rest area for visitors.