Tucked behind the imposing facade of Kongōbu-ji Temple, the head temple of Koyasan’s esoteric Shingon Buddhism, lies Japan’s largest Zen rock garden, Banryūtei, or “The Garden of the Reclining Dragon.” Far from your average gravel swirls, Banryūtei is a deliberate masterpiece spanning over 2300 square metres. It was established in 1984, some 1150 years after the death of Grand Master Kobo Daishi, as a place of calm contemplation.