White surf crashes against the rocks overhead and the sea churns at the Naruto whirlpools. As the tides change, the water passing through Naruto Strait, a channel connecting the Inland Sea and the Pacific Ocean, creates whirlpools that can reach a diameter of 20 meters. In Hiroshige’s design, the viewer is nearly submerged in one such vortex as the sea roils in shades of blue. In the distance, the current quiets and plovers fly overhead. Today, the whirlpools remain a natural attraction, typically appearing twice a day with the changing tides. The former Awa Province now belongs to modern Tokushima Prefecture.