Wakashima Gonemon is searching in a whirlpool at the bottom of the Sumida
river for an ancient dragon-headed bell (the bell is out of view at the left
bottom corner, at the intersection of the two beams of light). The Water
Dragon God was unwilling to part with it, and the rope that Gonemon took
down to use to haul it up broke, and the bell is still there on the bottom.