At almost 4km long, surviving a 7.2 magnitude earthquake before the competition the Akashi Bridge is currently the longest suspension bridge in the world.
This tour runs between April and November, the trip is 2 hours long, Twenty minutes of those up top and costs 3000 yen for adults and 1500 yen for children. There are some conditions so please check their website.
Location and Information
You need to book in advancd and since the tour is weather reliant remember to have a backup plan.