Japan National Route 231

National Route 231 is a national highway of Japan connecting Kita-ku, Sapporo and Rumoi, Hokkaido in Japan, with a total length of 129.2 km (80.28 mi).

National Route 231
国道231号
Route information
Length	129.2 km[1] (80.3 mi)
Location
Country	Japan
Highway system
National highways of Japan Expressways of Japan
← National Route 230 → National Route 232

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 18 February 2020.