The Sea Beast of Kanezakiura ( 鐘崎浦の海獣 ) is a cryptid reported from Kanezakiura, Munakata County, in what is now Fukuoka Prefecture, Japan.
Sometime between 1804 and 1818, a strange 3-meter-long creature was found napping on a rock in the sea at Kanezakiura. Neighbors tried to catch it with tubs and sticks. However, the creature took the tubs, etc., and was beaten to death with sticks by a large number of people.
The true identity of this creature is not known, but given the features of the sketch, it was most likely a seal or sea lion.