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is a national highway of
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
that connects the capital cities of
Miyagi Prefecture is a Prefectures of Japan, prefecture of Japan located in the Tōhoku region of Honshu. Miyagi Prefecture has a population of 2,265,724 (1 August 2023) and has a geographic area of . Miyagi Prefecture borders Iwate Prefecture to the north, Akit ...
and
Yamagata Prefecture is a Prefectures of Japan, prefecture of Japan located in the Tōhoku region of Honshu. It has a population of 1,005,926 (1 February 2025) and an area of 9,325 Square kilometre, km2 (3,600 Square mile, sq mi). Its neighbours are Akita Prefectu ...
,
Sendai is the capital Cities of Japan, city of Miyagi Prefecture and the largest city in the Tōhoku region. , the city had a population of 1,098,335 in 539,698 households, making it the List of cities in Japan, twelfth most populated city in Japan. ...
and Yamagata. It has a total length of .


Route description

National Route 48 is one of the primary east-west highways in the prefectures of Miyagi and Yamagata and is the main toll-free route between the city of Sendai on the Pacific coast and the city of Yamagata in Yamagata Prefecture's interior plains. It carries traffic across the
Ōu Mountains The are a mountain range in the Tōhoku region of Honshū, Japan. It is the longest range in Japan and stretches south from the Natsudomari Peninsula of Aomori Prefecture to the Nasu volcanoes at the northern boundary of the Kantō region. T ...
that separate the two cities. The highway's eastern terminus lies at a junction with
National Route 45 The following highways are numbered 45: International * AH45, Asian Highway 45 * European route E45 Burma *National Road 45 (Burma) Canada * Alberta Highway 45 * Manitoba Highway 45 * Ontario Highway 45 * Saskatchewan Highway 45 China * ...
in Sendai's Aoba ward. Its first stretch is a brief concurrency with National Route 286. Leaving National Route 286 and central Sendai, a section of the highway, the Sendai Nishi Road, is a limited-access road that connects central Sendai to the cross-country
Tōhoku Expressway The is a south-north national expressway, and the longest expressway in Japan at . Its southern terminus is in Kawaguchi, Saitama in the Greater Tokyo Area, at the Tokyo Gaikan Expressway and Kawaguchi Route near Araijuku Station, and its no ...
via of tunnels. Continuing west from the highway's junction with the Tōhoku Expressway, the highway is known as the Ayashi Bypass. The highway meets National Route 457, which is shares a brief concurrency with before that route continues to the south. Crossing into Yamagata Prefecture the highway shares a significant concurrency with National Route 13 in the Yamagata cities of Tendō and Yamagata. The highway while running concurrently with National Route 13, meets its western terminus at a junction with National Route 112 to the south of central Yamagata. The highway has a total length of .


History

National Route 48 was first established as Secondary National Route 110 in 1953 between the cities of Sendai and Yamagata. It was upgraded to National Route 48 in 1963 and National Route 110 was abolished. The Sendai Nishi Road, billed as the "Land Gateway to Sendai", that links central Sendai to Sendai-Miyagi Interchange on the Tōhoku Expressway was partially opened in 1983 and fully opened in 1987 after construction was completed on a series of tunnels. It replaced the original, congested two-lane section of National Route 48 along the Hirose River. The road along the river was redesignated as Miyagi Prefecture Route 31 after the completion of the Sendai Nishi Road. The Ayashi Bypass to the west of the Sendai Nishi Road along the route was opened in 1994.


Major intersections

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


Japan National Route 110

is a former secondary national highway of Japan that occupied the same route as National Route 48 from Sendai to Yamagata. It existed from 1953 to 1963, when it was redefined as the National Route 48.


References


External links

* {{National Routes of Japan, 48 048 Roads in Miyagi Prefecture Roads in Yamagata Prefecture 1963 establishments in Japan