Research

.."The Umibōzu is said to live in the ocean and capsize the ship of anyone who dares speak to it. This spirit's name, which combines the character for "sea" with the character of "Buddhist monk," is possibly related to the fact that the Umibōzu is said to have a large, round head, resembling the shaven heads of Buddhist monks. Alternatively they are enormous Yōkai (spectres) that appear to shipwreck victims and fishermen. They are believed to be drowned priests, and exhibit the shaven head and typically appears to be praying. It is usually reported as having a grey, cloud-like torso and serpentine limbs.