The 70-kilometer Shimanami Kaido cycling route, which links Honshu and Shikoku via a chain of bridges and islands, is a magnet for cyclists from across Japan - and even further afield. Among the people we met pedaling along this route were a father and son who come every year; a farmer reliving his youthful days on 2 wheels; and a middle-aged couple now able to spend more time together. Why is this route so special to them? For 3 days, we spoke to cyclists riding the Shimanami Kaido, come rain or shine.