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.

Route description

National Route 340 has a total length of 246.2 kilometers (153.0 mi).

History

National Route 340 was established by the Cabinet of Japan in 1975 between Rikuzentaka and Hachinohe.^[2]

Major intersections

All junctions listed are at-grade intersections unless noted otherwise.

Prefecture	Location	km	mi	Destinations	Notes
Iwate	Rikuzentakata	0.0	0.0	National Route 45 (Rikuzentakata Bypass) – Kamaishi, Ōfunato, Ishinomaki, Kesennuma	Southern terminus of national routes 340 and 343
		1.7	1.1	Iwate Prefecture Route 141 east	Intersection is closed due to post-2011 Tōhoku earthquake and tsunami reconstruction work
		2.7	1.7	Sanriku Expressway – Sendai, Kesennuma, Miyako, Kamaishi	Rikuzentakata Interchange (E45 exit 31)
		4.9	3.0	National Route 343 west – Ōshū, Ichinoseki	Northern end of unsigned National Route 343 concurrency
	Sumita	17.8	11.1	National Route 107 east – Kamaishi, Ōfunato, Morioka, Kitakami, Tōno	Southern end of National Route 107 concurrency
		21.9	13.6	National Route 107 west – Morioka, Kitakami, Ōshū	Northern end of National Route 107 concurrency
		27.4	17.0	Iwate Prefecture Route 238 north
		29.9	18.6	Iwate Prefecture Route 167 east
	Tōno	38.2	23.7	Kamaishi Expressway / National Route 283 east – Kamaishi	Tōno-Sumita Interchange (E46 exit 6); southern end of National Route 283 concurrency
		41.7	25.9	National Route 283 east	Eastbound National Route 283 pedestrian, bicycle, or motorized traffic with engine displacement below 125cc traffic must use this road
		45.6	28.3	Iwate Prefecture Route 35 east – to National Route 45, Unosumai, Hashino iron mining and smelting site
		48.4	30.1	National Route 283 west (Tōno Bypass)	Northern end of National Route 283 concurrency
		51.8	32.2	Iwate Prefecture Route 160 west – Tsukimōshi
	Miyako	70.9	44.1	Iwate Prefecture Route 26 (former National Route 340) east – Ōtsuchi
		78.9	49.0	Iwate Prefecture Route 25 west – Shiwa
		86.0	53.4	National Route 106 west – Morioka	Southern end of National Route 106 concurrency
		87.4	54.3	Iwate Prefecture Route 143 south – Rikuchū-Kawai Station
		101.5	63.1	National Route 106 east – Miyako	Northern end of National Route 106 concurrency
	Iwaizumi	129.6	80.5	Iwate Prefecture Route 171 west – Okawa, Kamatsuda
		136.8	85.0	National Route 455 east – Ryūsendō, Iwaizumi	Southern end of National Route 455 concurrency
		147.7	91.8	National Route 455 west – Morioka	Northern end of National Route 455 concurrency
	Kuzumaki	160.9	100.0	Iwate Prefecture Route 202 east – Fudai, Akka
		176.3	109.5	National Route 281 west – Morioka, Iwate Town	Southern end of National Route 281 concurrency
		177.3	110.2	National Route 281 east – Kuji	Northern end of National Route 281 concurrency
	Kunohe	190.7	118.5	Iwate Prefecture Route 271 west – Anetai
		190.9	118.6	Iwate Prefecture Route 272 east – Nikarube
		196.9	122.3	Iwate Prefecture Route 5 east – Yamagata	Southern end of Iwate Prefecture Route 5 concurrency
		199.8	124.1	Iwate Prefecture Route 5 west – Ichinohe	Northern end of Iwate Prefecture Route 5 concurrency
		200.5	124.6	Iwate Prefecture Route 24 west – Ninohe
		202.8	126.0	Hachinohe Expressway – Morioka, Hachinohe Iwate Prefecture Route 22 (Karumai Kunohe Route) east – Taneichi, Kuji ,Yamagata	Kunohe Interchange (E4A exit 3)
	Karumai	209.4	130.1	Iwate Prefecture Route 264 (Ninohe Karumai Route) – Natsumagi, Kiminarita
		212.4	132.0	National Route 395 west – Ninohe	Southern end of National Route 395 concurrency
		217.0	134.8	Iwate Prefecture Route 33 north – Hachinohe, Nagawa
		221.2	137.4	Hachinohe Expressway – Morioka, Hachinohe, Misawa Iwate Prefecture Route 264 (Ninohe Karumai Route) south – Central Karumai	Karumai Interchange (E4A exit 4)
		221.3	137.5	National Route 395 east – Kuji, Ōno	Northern end of National Route 395 concurrency
Aomori	Hachinohe	231.3	143.7	Aomori Prefecture Route 42 – Nanbu, Hashikami, Hachinohe Expressway
		242.4	150.6	Aomori Prefecture Route 29 (Hachinohe Belt Highway) – Hachinohe Station, Hashikami, Kuji, Hachinohe Expressway, Hachinohe-Kuji Expressway
		244.4	151.9	National Route 340 south	Western end of southbound side of National Route 340 one-way pair
		244.5	151.9	National Route 340 north Aomori Prefecture Route 251 west – to National Route 104	Western end of northbound side of National Route 340 one-way pair
		246.2	153.0	National Route 45 (Hachinohe Bypass) – Towada, Kuji Aomori Prefecture Route 1 east –Kabushima, Tanesashi Seaside	Northern terminus; eastern end of National Route 340 one-way pair; northbound traffic continues as Aomori Prefecture Route 1 east
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Closed/former       Concurrency terminus