The Oidono Hall is a structure used primarily to prepare rice and rice cakes made from rice grain for offerings to the deity. Casually it is known as Oidokoro, kitchen to the gods. There is a cooking stove in the earth of the entrance way and the inner room houses the main kitchen. Including the special holy rice cakes offered to the deity during the Aoi Matsuri, there are many items on display, such as replicas of the traditional offerings to the deity from ancient times and cooking utensils. In the shrine garden, called the Wild Ginger Garden, there are many medicinal herbs, such as wild ginger (aoi), rosewood (karin), sumac trees, hydrangeas, katsura trees, and yamaukogi, a ginseng-like shrub. The karin trees are especially famous and this garden is also known as Karin garden. Along with the well (known as the Mii) employed to provide the water used to make the rice cake offerings, the garden has been specified as an important cultural property. The building attached to the west side of the Oidono Hall, the Okurumaya (coach exhibition), is used to store and display the ornamental ceremonial coach used in the Aoi Matsuri and other items, such as ancient reference materials.