Umibozu (Fukuoka)

Umibozu is a giant black, shaven-headed figure said to rise suddenly from the sea on calm nights, looming over passing boats. In the canonical narrative the figure asks for a dipper; if the sailor hands over a bottomless dipper the boat is spared, but a normal dipper is used to pour water into the boat until it sinks. Cases are recorded along the Genkai Sea coast of northern Kyushu (including Fukuoka City), the Ariake Sea coast, the Seto Inland Sea, and the Pacific coast. Toriyama Sekien's Konjaku Gazu Zoku Hyakki (Anei 8, 1779) provides the canonical figure, propagated through Edo-period figural yokai traditions. Yanagita Kunio's Yokai Dangi (1956) records umibozu cases; Murakami Kenji's Nihon Yokai Daijiten (Kadokawa, 2005) and the Nichibunken Strange Phenomena and Yokai Folklore Database collect regional examples. Adjacent figures include the uminyudo, umizato, and isonade, sharing the imagery of a vast presence on the night sea.