Japan National Route 421

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National Route 421 shield

National Route 421
国道421号
Route information
Length: 72 km (45 mi)
Highway system
National highways of Japan
Expressways of Japan

National Route 421 is a national highway of Japan connecting Kuwana, Mie and Ōmihachiman, Shiga in Japan, with a total length of 72 km (44.74 mi).