Japan National Route 51

National Route 51 is a national highway of Japan connecting Chūō-ku, Chiba and Mito, Ibaraki.

National Route 51 shield
National Route 51
Route information
Length124 km[1] (77 mi)
Existed1 April 1963–present
Major junctions
North end National Route 50 in Mito, Ibaraki
South end National Route 14 / National Route 126 in Chūō-ku, Chiba
Highway system
National Route 50 National Route 52
Route 51,Toyomi,Narita-city,Japan.jpg

Route dataEdit

  • Length: 124 km (77.05 mi).


Route 51 was originally designated National Route 123 on 18 May 1953 as , and then was redesignated Route 51 when the route was promoted to a Class 1 highway.


  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 19 February 2020.