Tokoyo or O-Tokoyo is the female protagonist of a supposed Japanese folk story found in Richard Gordon Smith's 1918 book Ancient Tales and Folk-Lore of Japan. Set in the Oki Islands located in the Sea of Japan, the story portrays Tokoyo as the daughter of an exiled samurai who slew a malevolent sea monster that demanded the sacrifice of virgin maidens. Tokoyo and Yofunenushi Smith's story begins by identifying Tokoyo as the eighteen-year-old daughter of a samurai from Shima Peninsula (part of Ise Province) named Oribe Shima, who was exiled to the Oki Islands by Hōjō Takatoki, the ruling regent or shikken of Japan's Kamakura shogunate in the early 14th century. Determined to find her father, Tokoyo set out for a place called Akasaki, which was just off the coast from the Oki Islands. Although she asked the fishermen to ferry her there, they all refused, since it was forbidden to visit anyone banished there. Undaunted, Tokoyo took a boat and sailed to the islands herself, spending the night on the beach. The next morning, she encountered a fisherman, whom she asked about her father. The fisherman replied he knew nothing, and warned her not to ask anyone else about his whereabouts. Coming upon a small shrine, Tokoyo implored the Buddha for his aid to find her father and then laid down to rest. She was awoken by the sound of a girl crying, and looked up to see a fifteen-year-old girl and a priest, who was leading the girl to the edge of a cliff. Tokoyo quickly came to the girl's rescue. The priest then explained he was going to sacrifice the girl in order to appease an evil kami living under the sea named Yofuné-Nushi, who demanded the annual sacrifice of a young girl. Tokoyo offered to take the girl's place and handed the priest a letter addressed to her father. She then drew an ancestral dagger, clenched it between her teeth, and dived down into the sea. At the bottom of the sea, Tokoyo found a mighty cave, in which was housed a wooden statue of Hōjō Takatoki, the man who exiled her father. Thinking of bringing it back with her to the surface, she tied it to herself and began to swim back. Before she could leave the cave, a large, luminous serpentine monster (Yofuné-Nushi) confronted her. Devoid of fear, Tokoyo first stabbed it in the