Wikipedia
Watatsumi
, also pronounced Wadatsumi, is a legendary kami (神, god; deity; spirit), Japanese dragon and tutelary water deity in Japanese mythology. is believed to be another name for the sea deity Ryūjin (龍神, Dragon God), and also for the , which rule the upper, middle, and lower seas respectively and were created when Izanagi was washing himself after returning from Yomi, "the underworld".