The Shimanami Kaido links a chain of islands in the Seto Inland Sea with seven bridges, and is one of the world's best-loved cycle routes. From Onomichi it crosses Mukaishima, Innoshima, Ikuchijima (with the town of Setoda), Omishima, Hakatajima and Oshima, then the Kurushima-Kaikyo Bridge into Imabari.
A blue line painted on the road marks the recommended route. Each bridge is reached by a long, gentle ramp, so pace yourself. Rental bikes can be dropped off at terminals on the islands, so you can stop partway.
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