Japan National Route 340

National Route 340
国道340号
Japan National Route 340 highlighted in red
Route information
Length	246.2 km[1] (153.0 mi)
Existed	1 April 1975–present
Major junctions
South end	National Route 45 in Rikuzentakata, Iwate
North end	National Route 45 in Hachinohe, Aomori
Location
Country	Japan
Highway system
National highways of Japan Expressways of Japan
← National Route 339 → National Route 341

National Route 340 (国道340号, Kokudō Sanbyakuyonjūgō) is a national highway of Japan connecting the cities of Rikuzentakata, in southeastern Iwate Prefecture, and Hachinohe, in southeastern Aomori Prefecture. It travels south to north and has a total length of 246.2 kilometers (153.0 mi). It serves primarily as an alternate, inland route to National Route 45 through the northeastern part of the Tōhoku region.