The "Great Shii Tree of Hōki," which stretches its branches like an arch over the approach to Kasuga Shrine, is a giant tree over 1,000 years old. It stands about 15 meters tall, with a branch spread of about 22 to 30 meters, and a trunk circumference of 11.4 meters. It was designated as a national natural monument in 1937 and selected as one of Japan’s 100 famous trees in 1990.