Japan National Route 400

National Route 400 is a national highway of Japan connecting Mito, Ibaraki and Nishiaizu, Fukushima, with a total length of 225.7 km (140.24 mi).

National Route 400
国道400号
Route information
Length	225.7 km[1] (140.2 mi)
Location
Country	Japan
Highway system
National highways of Japan Expressways of Japan
← National Route 399 → National Route 401