It looks as though it should serve as a speed ramp connecting Mario Circuit with Rainbow Road, but in fact connects the cities of Matsue and Sakaiminato, spanning a mile across Lake Nakaumi.
It has a gradient of 6.1 per cent on the Shimane Prefecture side and 5.1 per cent on the Tottori Prefecture side, making it appear like the apex of a rollercoaster.
As for footpaths, the Sidhue River Bridge in China stands at a palm-sweating 460m.
Terrifying as it might be to drive up, it’s not the world tallest vehicular bridge – that accolade goes to France’s Millau Viaduct, which is taller than the Eiffel Tower reaching 270m above the valley below.