Japanese dragons are diverse legendary creatures in Japanese mythology and folklore. Japanese dragon myths amalgamate native legends with imported stories about dragons from China, Korea and the Indian subcontinent. The style and appearance of the dragon was heavily influenced by the Chinese dragon, especially the three-clawed long (龍) dragons which were introduced in Japan from China in ancient times. Like these other East Asian dragons, most Japanese ones are water deities or kami associated with rainfall and bodies of water, and are typically depicted as large, wingless, serpentine creatures with clawed feet.

Kami are the deities, divinities, spirits, mythological, spiritual, or natural phenomena that are venerated in the Shinto religion. They can be elements of the landscape, forces of nature, beings and the qualities that these beings express, and/or the spirits of venerated dead people. Many kami are considered the ancient ancestors of entire clans. Traditionally, great leaders like the Emperor could be or became kami.