Length 129.2 km | Major cities Ishikari | |
 | ||
National Route 231 is a national highway of Japan connecting Kita-ku, Sapporo and Rumoi, Hokkaidō in Japan, with a total length of 129.2 km (80.28 mi).
Map of Japan, Hokkaid%C5%8D, %E5%9B%BD%E9%81%93231%E5%8F%B7%E7%B7%9A
References
Japan National Route 231 Wikipedia(Text) CC BY-SA