The Shimanami Kaido crosses the Seto Inland Sea for 70 kilometers from Onomichi City through six islands to Imabari City on Shikoku. The whole course has a dedicated cycling route, keeping cyclists away from the traffic and close to the beautiful scenery of the Seto Inland Sea. You can customize your journey, choosing to cycle the whole course, or opting to complete small sections and return to Onomichi on a boat or a bus.
There is a bicycle rental service for the Shimanami Kaido. You can rent and drop off a bicycle at any terminal along the Shimanami Kaido. Basic bicycles can be rented for 1000 yen for adults and 300 yen for children per day. Electric assisted bicycles can be rented for 1500 yen up to 6 hours. Two-person tandem cycles can be rented for 500 yen per day, although some terminals do not stock tandems. A 1000 yen deposit is required at the time of renting (you get the deposit back if you return the bicycle at the same terminal). For more high-end road bikes, check out the GIANT bicycle shop in Onomichi U2 and Imabari.
Click here for the details of the Shimanami Kaido Cycling Course.