Shimanami Kaido — Island-Hopping Cycling Route Paradise

The Shimanami Kaido (しまなみ海道), completed in 1999, runs 70 kilometers from Onomichi to Imabari, linking six islands with expressway bridges that have dedicated cycling lanes bolted to the sides. CNN called it "the world's most bike-friendly route" in 2014, which immediately quadrupled foreign cyclists and sparked the current rental e-bike boom. The blue line painted on the pavement is your guide—it never leaves you guessing at intersections. Vehicle traffic stays on the upper deck of most bridges; cyclists get the lower deck or a separate ramp system, so you're never dodging cars.

Mukaishima (first island) grows mandarins in terraced hillsides; you'll smell citrus blossoms in April. Innoshima's Shimanami Beach (closed in winter) has a campground where overnight cyclists pitch tents for ¥500. Ikuchijima is lemon country—60% of Japan's lemons come from here—and every cafe sells lemon soft-serve that's aggressively sour. Kosanji Temple looks like a Buddhist Disneyland; the abbot who built it in the 1930s had no training and just copied famous architecture he liked (a mini Kinkaku-ji, a replica cave from Dunhuang). It's garish but sincerely weird. Omishima's Oyamazumi Shrine holds 80% of Japan's National Treasure armor—warlords from the 1100s onward donated gear after victories, thinking the war god here granted them success. The final bridge, Kurushima Kaikyo, stacks three suspension spans in sequence; crossing it at sunset, with the Seto Inland Sea glowing below and Shikoku's mountains ahead, justifies every uphill meter you pedaled. Most people take 6-8 hours riding time spread over two days. Serious cyclists hammer it in four; families with kids take three.