Scattered Masks and Snake
A design depicting many masks is called "Men Chirashi", or "Scattered Masks" and usually consists of the Okame, Hyottoko, Oni, Hannya, Tengu, Crow Tengu and Fox masks among many others. Five masks are chosen from this selection to form the "Scattered Masks" design.
In Japan, the snake is believed to have been a weather god (Tenko-shin) and a water god (Sui-jin) from ancient times that could upon the rain and thunder. It is also believed that if one puts a snake's shed skin in their purse, they would become rich and seeing a white snake would bring them good fortune. The snake is seen as a good omen in Japan.