The lion-dog is an image of a guardian dedicated to the area surrounding a shrine. Although the two are often both called stone guard dogs, the one with an open mouth is a lion. The other is a lion-dog with a closed mouth, and it often has corners. The lion-dog is thought to have entered Japan at the same time as Buddhism, and at that time both were lions. After that, the set of lion and lion-dog was created in Japan, and they were placed at many shrines.