Saigawa Bridge, Steel truss road bridge in Kanazawa, Japan

Saigawa Bridge is a single-span steel Warren truss bridge with a curved upper chord, 62.3 m long and 18.7 m wide, carrying four lanes of National Route 157 across the Sai River between Sen'nichi-machi and Katamachi 1-chome. Its steel was partly sourced from Middlesbrough, England, as noted on a pier nameplate, and a gold-leaf bridge nameplate inscribed by Governor Hisakazu Hasegawa hangs on the upper beam.

The bridge was first built in 1594 and served merchants and travelers crossing between districts. It was later reinforced with modern steel elements to handle changing traffic needs over the centuries.

The bridge's name plate above the roadway is gilded with gold leaf and bears the calligraphy of Hasegawa Kyūichi, Ishikawa Prefecture governor when the 1924 bridge was completed. A local tradition holds that Matsuo Bashō composed a haiku on the bridge. In July 2024 a centenary festival, the Saigawa Ōhashi Hyakuju-sai, marked 100 years of the crossing.

The bridge is accessible throughout the day and night with clear pathways for pedestrians. Cross with care in strong wind or rain, as the open truss design offers limited shelter.

The steel for the 1924 bridge was hard to obtain after the Great Kanto Earthquake, so part of it was imported from Britain; a nameplate on the pier steel still reads Middlesbrough, the place of origin. The bridge name plaque on the girder is gilded and was written by Hasegawa Kyuichi, Ishikawa Prefecture governor when the bridge was completed.