is a national highway connecting Kaita, Hiroshima and Kure in Japan. Route data Length: 20.1 km (12.5 mi) Origin: Kaita, Hiroshima (originates at junction with Route 2) Terminus: Kure (ends at the origin of Route 185) Major cities: Aki-ku, Hiroshima, Saka History 1952-12-04 - First Class National Highway 31 (from Kaita, Hiroshima to Kure) 1965-04-01 - General National Highway 31 (from Kaita, Hiroshima to Kure) Intersects with Hiroshima Prefecture References 031 Roads in Hiroshima Prefecture