That big bath tub in the background is (nowadays) known as the “Goemon bathtub”. Funny, huh? It would have been funnier if it’s Goemon himself in front of the tub, but I don’t have screenshots of him in the bathroom, so…

Well, actually… it’s the bath tub shaped like this:

But in some anime/manga they call the wooden barrel bathtub “Goemon bathtub” too, so… same difference.