Nagano Expressway

Nagano Expressway

Nagano Expressway sign

Nagano Expressway
Route information
Maintained by East Nippon Expressway Company and Central Nippon Expressway Company
Length: 75.8 km[2] (47.1 mi)
Existed: 1986[1] – present
Major junctions

Okaya Junction in Okaya, Nagano

Japanese Road sign (Vehicles Only).svg Chūō Expressway

Kōshoku Junction in Chikuma, Nagano

Japanese Road sign (Vehicles Only).svg Jōshin-etsu Expressway
Major cities: Shiojiri, Matsumoto, Azumino
Highway system

National highways of Japan
Expressways of Japan

The Nagano Expressway (長野自動車道 Nagano Jidōsha-dō?) is a 4-laned national expressway in Nagano Prefecture, Japan. It is owned and operated by East Nippon Expressway Company and Central Nippon Expressway Company.



The expressway is officially referred to as the Chūō Expressway Nagano Route. The Chūō Expressway Nagano Route is the official designation for the Chūō Expressway between Takaido Interchange and Okaya Junction (concurrent with the Chūō Expressway Nishinomiya Route), the Nagano Expressway between Okaya Junction and Kōshoku Junction, and the Jōshin-etsu Expressway between Kōshoku Junction and Suzaka-Naganohigashi Interchange (concurrent with the Kan-Etsu Expressway Jōetsu Route).[3]


Nagano Expressway

The expressway was originally built and managed by Japan Highway Public Corporation. On October 1, 2005, the management of the route was assigned to East Nippon Expressway Company (Kōshoku Junction to Toyoshina Interchange, excluding the interchange) and Central Nippon Expressway Company (Okaya Junction to Toyoshina Interchange, including the interchange).[4][5]

The route of the expressway runs through the central part of Nagano Prefecture. From the origin at a junction with the Chūō Expressway in the city of Okaya near Lake Suwa, the expressway follows a northerly course to Matsumoto, the major city in the central Nagano area. From here the expressway follows a winding northeasterly course through mountainous areas before reaching the terminus in the city of Chikuma. Beyond the terminus, the roadway continues as the Jōshin-etsu Expressway towards the city of Nagano, the prefectural capital.


  • March 25, 1986 - Okaya Junction - Okaya Interchange section is opened as part of the Chūō Expressway.
  • March 5, 1988 - Okaya Interchange - Matsumoto Interchange section is opened, Okaya Junction - Okaya Interchange section is incorporated as part of the Nagano Expressway.
  • August 3, 1988 - Matsumoto Interchange - Toyoshina Interchange section is opened.
  • March 25, 1993 - Toyoshina Interchange - Kōshoku Junction section is opened, connects with Jōshin-etsu Expressway.
  • October 1, 2006 - Obasute Smart Interchange is opened at Obasute Service Area.

List of interchanges and features

No. Name Connections Dist. from
Dist. from
Bus Stop Notes Speed Limit Location
(all in Nagano)
(21) Okaya JCT Japanese Road sign (Vehicles Only).svg Chūō Expressway 0.0 75.8 70km/h Okaya
BR Okaya Overpass Length - 1,488m
TN Okaya Tunnel
1 National Route 20 3.7 72.1
TN Enrei Tunnel
PA Midoriko PA 8.4 67.4
2 Shiojiri IC Japanese National Route Sign 0020.svg National Route 20 (Shiojiri Bypass) 10.9 64.9
BS Hirooka-Nomura BS 14.1 61.7
3 Shiojiri-kita IC Pref. Route 27 (Matsumoto Airport Shiojiri-kita Inter Route) 17.6 58.2
BR Naraigawa Bridge Matsumoto
BS Kanbayashi BS 21.0 54.8
<3-1> Matsumoto JCT Japanese National Route Sign 0158.svgJapanese Road sign (Vehicles Only).svgChūbu-Jūkan Expressway Planned
4 Matsumoto IC Japanese National Route Sign 0158.svg National Route 158 25.8 50.0
SA Azusagawa SA 29.1 (46.7) Kōshoku-bound only
BR Azusagawa Bridge Length - 390m
SA Azusagawa SA (29.9) 45.9 Okaya-bound only
5 Toyoshina IC Pref. Route 57 (Toyoshina Inter Horigane Route)
Pref. Route 310 (Hakuyachō Tazawa Teishajō Route)
33.1 42.7
BR Saigawa Bridge Length - 650m
BS Akashina BS 36.5 39.3
TN Akashina Tunnel
BS Shiga BS 40.5 35.3 Emergency vehicle entrance/exit planned Matsumoto
TN Tachitoge Tunnel
BS Honjō BS 47.3 28.5 Emergency vehicle entrance/exit
BS Sakakita BS 51.5 24.3
PA Chikuhoku PA 52.8 23.0
6 Omi IC Japanese National Route Sign 0403.svg National Route 403 56.3 19.5
TN Ipponmatsu Tunnel
SA Chikumagawa Bridge Length - 530m Nagano
7 Kōshoku IC Japanese National Route Sign 0018.svg National Route 18 74.9 0.9
(12) Kōshoku JCT Japanese Road sign (Vehicles Only).svg Jōshin-etsu Expressway 75.8 0.0
Through to Japanese Road sign (Vehicles Only).svg Jōshin-etsu Expressway

There is one snow chain changing area between Obasute Service Area and Kōshoku Interchange.


  1. ^ "Expressway Opening Dates" (in Japanese). Retrieved 2008-04-16. 
  2. ^ Ministry of Land, Infrastructure and Transport, Kanto Regional Development Bureau. "Road Timetable" (in Japanese). Retrieved 2008-04-16. 
  3. ^ Ministry of Land, Infrastructure and Transport. "High Standard Trunk Road Map" (in Japanese) (pdf). Retrieved 2008-04-13. 
  4. ^ Mizutani, Fumitoshi; Uranishi, Shuji (2006). "Privatization of the Japan Highway Public Corporation: Policy Assessment" (pdf). 46th Congress for the European Regional Science Association. Volos, Greece. Retrieved 2008-04-11. 
  5. ^ "NEXCO-Central Business Outline" (pdf). Retrieved 2008-04-13. 

External links

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