We got a tandem bike and rented it for the whole day at a great price (300¥ deposit and ¥10 an hour, prices may vary though). Very simple and easy to rent. The views are great. The beaches are full of people and lots of other cyclists will be there taking advantage of the great weather. The two towers they are currently building are also very impressive. It cost us ¥60 for the whole day. The evening ride back is just as pleasant.
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