National Route 397 is a national highway of Japan connecting Ōfunato, Iwate and Yokote, Akita in Japan, with a total length of 137.8 km (85.62 mi).

The Koyagi Bridge carries Route 397 over the Kitakami River in Mizusawa Ward, Oshu City, Iwate Prefecture. This bridge was built in 1978 but the center span fell in 1994.

References

  1. ^ "一般国道の路線別、都道府県別道路現況" [Road statistics by General National Highway route and prefecture] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 12 February 2020.