The Hachiman Seto is a major shipping route connecting the large ports along the eastern shore of Yatsushiro Inland Sea to the East China Sea. The passage is full of obstacles and the ships passing through take a circuitous course avoiding them. Additionally, fast currents flow in several directions within the straits.
For kayakers unfamiliar with this it may be difficult to avoid a collision while crossing the straits. Having studied the charts we knew where this behemoth was heading and therefore were able to come pretty close to snap this picture without any danger.