Length 352.8 km | ||
 | ||
Major cities Suzaka, Sanjo, Chikuma, Nagaoka, Iiyama | ||
National Route 403 is a national highway of Japan connecting Chūō-ku, Niigata and Matsumoto, Nagano in Japan, with a total length of 352.8 km (219.22 mi).
References
Japan National Route 403 Wikipedia(Text) CC BY-SA