Japan National Route 140

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National Route 140 shield

National Route 140
Route information
Length: 146.6 km (91.1 mi)
Highway system
National highways of Japan
Expressways of Japan

National Route 140 is a national highway of Japan connecting Kumagaya, Saitama and Masuho, Yamanashi in Japan, with a total length of 146.6 km (91.09 mi).

The route includes the Karisaka Tunnel, first opened in 1998 and at 6,225m the fifth-longest road tunnel in Japan.