There are some temples exist Ryu (Dragon) drawing on slide door or roof.
For example, Sokokuji temple dragon’s room make echo in certain place by crapping which calls “Naki Ryu” (cries dragon).
Originally Ryu is continent visionary animal and it unified with Japanese belief, snake god. And it recognized as holly animal in Japanese culture.
Ryu is known as god of rain. It appears in several myths and stories asking for rain.
When Kyoto became the capital, the city street planning adopted feng sui which has an ideal topography for the four Taoist gods. And based on the idea Ryu is protection of East where locates Kamogawa River.