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 around 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 whole of Koyasan and Kongobu-ji Temple were synonymous. It is one of the sacred sites in Japanese Buddhism, opened as a training ground for ascetic practices by Kukai, who was granted the land by Emperor Saga in 816 AD. Koyasan is mainly divided into three areas: "Danjo Garan," "Kongobu-ji Temple," and "Okunoin." "Danjo Garan" is the fundamental dojo of Shingon Esoteric Buddhism, founded by Kobo Daishi Kukai. Many halls stand in a row, and many Buddha statues are enshrined. "Kongobu-ji Temple" is the head temple of the Koyasan Shingon sect, where ceremonies and Buddhist services are held. "Okunoin" is the center of faith in Kobo Daishi. 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 Yuisyo-sho (Historical Document) (folded to envelope size) <Nyonindo (Women's Hall)> One of the seven entrances to Koya, the only Nyonindo that still exists at Fudo-guchi. In the past, Nyonindo existed at all seven entrances. During the time when women were forbidden from entering Koyasan, 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 the Danjo Garan and Okunoin, which could be glimpsed through the trees, while going around the peaks. After the ban on women was lifted in the Meiji era, it was used as a rest area for visitors.