This Japanese monster scared the living crap out of me as a kid (late ’70s, early ’80s) and visions of it still do.
It was a man in a rubber suit, so the monster was bipedal and man-sized. It had a giant eye on its stomach, webbing for ears on its head and claws it used to kill the men who came after it. I can remember it on a ship running around killing people. The movie was in black and white.
I’ve searched in vain for this demonic apparition for years and no one knows what I’m talking about.