The bridge was designed to withstand high tidal currents and strong winds common in the Hirado Strait.
The red pigment used for the bridge is specifically formulated to resist heavy salt spray damage caused by its coastal location.
Before the bridge's completion in 1977, the island was accessible only by a ferry service.
The structure acts as an engineering landmark, signaling the historical transition of Hirado from a secluded port to a modernized tourist destination.
Hirado Bridge is a 665-meter-long red steel suspension bridge connecting Hirado Island to the Kyushu mainland across the Hirado Strait. Completed in 1977, the bridge features a central span of 465.4 meters supported by two towering steel pylons. It functions as the primary vehicular artery for National Route 383, facilitating transit between the historic city of Hirado and Sasebo. The structure is painted a distinct bright red to ensure visibility against the deep blue waters and to minimize the impact of salt-air corrosion. The bridge deck reaches a maximum clearance of 30 meters above the sea surface at mean high water. It serves as a visual gateway to the Hirado region, marking the boundary between the Genkai Sea and the East China Sea.
The observation deck at Hirado Ohashi Park, located on the mainland side of the strait.
Stop at the Hirado Ohashi Park viewpoint on the mainland side for the best unobstructed views of the bridge structure.
The bridge is narrow with no pedestrian walkways, so it is intended for vehicular traversal rather than walking.
Check local wind reports before crossing, as high-profile vehicles may be subject to restrictions during severe weather.
Do not attempt to pull over or stop on the bridge itself, as there are no shoulders or pedestrian lanes.
