Japan National Route 4

National Route 4
National Route 4
国道4号
	Japan National Route 4 highlighted in red
Route information
Length	738.5 km (458.9 mi)
Existed	4 December 1952–present
Major junctions
South end	National Route 1 / National Route 15 / National Route 20 in Nihonbashi, Chūō-ku, Tokyo
	National Route 6; National Route 14; National Route 17; National Route 16; National Route 50; National Route 49; National Route 13; National Route 45; National Route 47; National Route 46;
North end	National Route 7- Aomori West Bypass in Nagashima, Aomori, Aomori
Location
Country	Japan
Highway system
	National highways of Japan; Expressways of Japan;

National Route 4 (国道4号, Kokudō Yongō) is a major national highway in eastern Honshū, Japan. Measuring 738.5 kilometers long (458.9 mi), it is the longest highway in the country. When oversea routes are included, it is the second longest highway in Japan, with National Route 58 then measuring 884.4 kilometers (549.5 mi) because of its maritime sections. The highway connects Tokyo and Aomori via Utsunomiya, Kōriyama, Sendai, and Morioka.

From Saitama Prefecture to Iwate Prefecture, it parallels the Tōhoku Expressway; from Morioka to Hachinohe, it parallels the Hachinohe Expressway. At its northern terminus it links with National Route 7.