Watatsumi-no-mikoto is a deity of the sea in Japanese mythology, revered as a guardian spirit of the ocean and its creatures. Associated with fishing communities, this deity is honored at various shrines along the coast, where fishermen and sailors have traditionally sought favor for safe voyages and abundant catches. Watatsumi appears in early Japanese texts such as the Kojiki and Nihon Shoki, reflecting the deep reverence held for the sea as both a source of sustenance and a powerful natural force.