Nagano Expressway

Nagano Expressway sign
Nagano Expressway
長野自動車道 E19 Expressway (Japan).png
Route information
Maintained by East Nippon Expressway Company and Central Nippon Expressway Company
Length75.8 km[2] (47.1 mi)
Major junctions
FromOkaya Junction in Okaya, Nagano
E19 Expressway (Japan).png E20 Expressway (Japan).png Chūō Expressway
ToKōshoku Junction in Chikuma, Nagano
E18 Expressway (Japan).png Jōshin-etsu Expressway
Major citiesShiojiri, Matsumoto, Azumino
Highway system

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 Azumino Interchange, excluding the interchange) and Central Nippon Expressway Company (Okaya Junction to Azumino 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 E19 Expressway (Japan).png E20 Expressway (Japan).png Chūō Expressway 0.0 75.8 70 km/h Okaya
BR Okaya Overpass Length - 1,488m
TN Okaya Tunnel North-bound 1,450 m
South-bound 1,386 m
1 Okaya IC/Okaya (Imai) BS Japanese National Route Sign 0020.svg National Route 20 (Shimosuwa Okaya Bypass) 3.7 72.1
TN Enrei Tunnel North-bound 1,800 m
South-bound 1,707 m
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
100 km/h
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.svg Chūbu-Jūkan Expressway Planned
4 Matsumoto IC Japanese National Route Sign 0158.svg National Route 158 25.8 50.0
SA Azusagawa SA/SIC Pref. Route 48 (Matsumoto Kanjō Takaya Route) 29.1 (46.7) Kōshoku-bound only
BR Azusagawa Bridge Length - 390m
SA Azusagawa SA/SIC (29.9) 45.9 Okaya-bound only
5 Azumino IC Pref. Route 57 (Azumino Inter Horigane Route)
Pref. Route 310 (Hakuyachō Tazawa Teishajō Route)
33.1 42.7
80 km/h
BR Saigawa Bridge Length - 650m
BS Akashina BS 36.5 39.3
TN Akashina Tunnel North-bound 2,512 m
South-bound 2,536 m
BS Shiga BS 40.5 35.3 Emergency vehicle entrance/exit Matsumoto
TN Tachitoge Tunnel North-bound 3,629 m
South-bound 3,598 m
BS Honjō BS 47.3 28.5 Emergency vehicle entrance/exit
BS Sakakita BS 51.5 24.3
PA Chikuhoku PA/SIC 52.8 23.0 SIC planned
6 Omi IC Japanese National Route Sign 0403.svg National Route 403 56.3 19.5
TN Ipponmatsu Tunnel North-bound 3,191 m
South-bound 3,203 m
SA Obasute SA/SIC 63.6 12.2
BR Chikumagawa Bridge Length - 530m Nagano
7 Kōshoku IC Japanese National Route Sign 0018.svg National Route 18 (Ueda Shinonoi Bypass) 74.9 0.9
(12) Kōshoku JCT E18 Expressway (Japan).png Jōshin-etsu Expressway (To Fujioka and Tōkyō) 75.8 0.0
Through to E18 Expressway (Japan).png Jōshin-etsu Expressway (To Nagano and Jōetsu)

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). Archived from the original on 2004-06-04. Retrieved 2008-04-16.{{cite web}}: CS1 maint: multiple names: authors list (link)
  3. ^ Ministry of Land; Infrastructure and Transport. "High Standard Trunk Road Map" (PDF) (in Japanese). Archived from the original (PDF) on 2011-09-20. 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.[permanent dead link]

External links

  • (in Japanese) East Nippon Expressway Company
  • Central Nippon Expressway Company

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