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National Route 146
国道146号
Japan Romantic Road
Route 146 in Karuizawa
Route information
Length	30.2 km[1] (18.8 mi)
Existed	1953–present
Major junctions
South end	National Route 18 inKaruizawa, Nagano
North end	National Route 144 /National Route 145 inNaganohara, Gunma
Location
Country	Japan
Highway system
National highways of Japan Expressways of Japan
←National Route 145 →National Route 147

National Route 146 is anational highway ofJapan connectingNaganohara, Gunma andKaruizawa, Nagano in Japan, with a total length of 30.2 km (18.77 mi).

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