Kongōbu-ji, nestled atop Mount Kōya in Wakayama Prefecture, is the head temple of Koyasan Shingon Buddhism, a significant sect founded by the revered monk Kobo Daishi. The temple's name translates to "Temple of the Diamond Mountain Peak," reflecting its esteemed status within the UNESCO World Heritage Site, "Sacred Sites and Pilgrimage Routes in the Kii Mountain Range."