| Country: | JPN |
| Type: | Expressway |
| Route: | Kan-Etsu |
| Alternate Name: | 関越自動車道 |
| Map Custom: | yes |
| Length Km: | 246.3 |
| Length Round: | 1 |
| Length Ref: | [1] |
| Established: | 1971[2] |
| Terminus A: | Tokyo Metropolitan Route 24 Nerima Interchange in Nerima, Tokyo |
| Cities: | Kawagoe, Fujioka, Takasaki, Maebashi, Ojiya |
| Terminus B: | Nagaoka Junction in Nagaoka, Niigata |
The is a national expressway in Japan. It is owned and managed by East Nippon Expressway Company.
is the kanji acronym of and the old comprising modern-day Niigata Prefecture.
Officially, the Kan-Etsu consists of two routes. Both begin in Tokyo and end in Niigata Prefecture. The Kan-Etsu Expressway Niigata Route consists of the entire Kan-Etsu Expressway from Nerima to Nagaoka, as well as the Hokuriku Expressway beyond Nagaoka to its terminus in the city of Niigata. The Kan-Etsu Expressway Jōetsu Route is concurrent with the Niigata Route until Fujioka Junction, where it branches off as the Jōshin-etsu Expressway and traverses Nagano Prefecture to its terminus in Jōetsu, Niigata.[3]
The expressway begins in Nerima Ward in the north of Tokyo; the Kan-etsu is the only national expressway linking Tokyo that does not have a direct connection with the urban Shuto Expressway network. A junction with the Tokyo Gaikan Expressway near the origin links the Kan-etsu with other expressways serving northern parts of the Tokyo urban area. From here the expressway follows a roughly northwesterly course to its terminus in Niigata Prefecture, passing through central areas of Saitama Prefecture and Gunma Prefecture. In Gunma the Kan-etsu Expressway provides access to Nagano Prefecture by way of the Jōshin-etsu Expressway at Fujioka Junction, and the completion of the Kita-Kantō Expressway in 2011[4] facilitated access to Tochigi Prefecture and Ibaraki Prefecture. The mountainous area separating Gunma and Niigata Prefectures is traversed by the Kan-Etsu Tunnel, the second longest road tunnel in Japan.[5] The expressway then passes through southern Niigata Prefecture before terminating at a junction with the Hokuriku Expressway in Nagaoka. The route is six lanes from Ōizumi Junction to Shibukawa-Ikaho Interchange, and all other sections are four lanes. The expressway parallels National Route 17 and the Jōetsu Shinkansen of East Japan Railway Company for most of its length.[6]
The first section opened in 1971 and the entire route was opened to traffic in 1985.[7] On the night of 16 December 2020, about 1,000 vehicles were trapped on the expressway after a trailer blocked it off due to it becoming stuck in the snow. In response, the company that manages the route supplied drivers who were stuck on the road until the next morning.[8] The Japan Ground Self-Defense Force was also deployed to the expressway to aid in the distribution of supplies to the stranded drivers.[9]
| No. | Name | Connections | Dist. from origin | Dist. from terminus | Bus stop | Notes | Speed limit | Location | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Nerima IC | Met. Route 24 (Nerima Tokorozawa Route / Mejiro Dōri) | 0.0 | 246.2 | 80 km/h | Nerima | Tokyo | |||
| 2 | Ōizumi JCT | Tokyo Gaikan Expressway | 0.8 | 245.0 | IC entrance: Nagaoka-bound only | |||||
| Ōizumi IC | Met. Route 24 (Nerima Tokorozawa Route / Mejiro Dōri) | |||||||||
| TB | Niiza Toll Gate | ↓ | ↑ | Niiza | Saitama | |||||
| 100 km/h | ||||||||||
| 3 | Tokorozawa IC | (Urawa Tokorozawa Bypass) | 9.4 | 237.6 | Tokorozawa | |||||
| PA | Miyoshi PA/ SIC | 13.9 | 233.1 | Miyoshi | ||||||
| 4 | Kawagoe IC | 21.2 | 225.9 | Kawagoe | ||||||
| BS | Kawagoe- Matoba BS | ↓ | ↑ | ○ | ||||||
| 4-1 | Tsurugashima JCT | Ken-Ō Expressway | 27.8 | 219.3 | Tsurugashima | |||||
| 5 | Tsurugashima IC | 29.6 | 217.5 | |||||||
| 5-1 | Sakado-Nishi SIC | Pref. Route 39 (Kawagoe Sakado Moroyama Route) | 32.5 | 214.6 | Sakado | |||||
| SA | Takasaka SA | 34.7 | 212.4 | Higashi- matsuyama | ||||||
| 6 | Higashi- matsuyama IC | Pref. Route 47 (Fukaya Higashimatsuyama Route) | 39.4 | 207.7 | ||||||
| 6-1 | Ranzan-Ogawa IC | Pref. Route 11 (Kumagaya Ogawa Chichibu Route) | 47.4 | 199.7 | Ranzan | |||||
| PA | Ranzan PA | 50.1 | 197.0 | |||||||
| 7 | Hanazono IC | 56.1 | 191.0 | Fukaya | ||||||
| 7-1 PA | Yorii PA | 63.4 | 183.7 | SIC: Nagaoka-bound only | Fukaya/ Yorii | |||||
| 8 | Honjō-Kodama IC | 69.6 | 177.5 | Honjō | ||||||
| 8-1 SA | Kamisato SA/ SIC | 75.5 | 170.6 | Kamisato | ||||||
| 9 | Fujioka JCT | Jōshin-etsu Expressway | 78.6 | 167.5 | Fujioka | Gunma | ||||
| 9-1 | Takasaki-Tamamura SIC | (Takasaki-Tamamura Bypass) | 82.7 | 163.4 | Takasaki | |||||
| 9-2 | Takasaki JCT | Kita-Kantō Expressway | 84.6 | 161.5 | ||||||
| 10 | Takasaki IC | Pref. Route 27 (Takasaki Komagata Route) | 87.0 | 159.1 | ||||||
| 11 | Maebashi IC | 92.1 | 154.0 | Takasaki/ Maebashi | ||||||
| 11-1 PA | Komayose PA/ SIC | 98.5 | 147.6 | Yoshioka | ||||||
| 12 | Shibukawa-Ikaho IC | (Shibukawa Bypass) | 103.4 | 142.7 | Shibukawa | |||||
| 80 km/h | ||||||||||
| BR | No.1 Tonegawa Bridge | ↓ | ↑ | Length: 784 m | ||||||
| CB | Miharada CB | ↓ | ↑ | Nerima-bound only | ||||||
| 12-1/ PA | Akagi IC/PA | Pref. Route 70 (Ōmama Kamishiroi Route) | 111.2 | 134.9 | ||||||
| SA | Akagi-kōgen SA | 118.5 | 127.6 | Shōwa | ||||||
| 12-2 | Showa IC | Pref. Route 65 (Shōwa Inter Route) | 120.6 | 125.5 | ||||||
| 13 | Numata IC | 125.8 | 120.3 | Numata | ||||||
| CB | Numata CB | ↓ | ↑ | Nagaoka-bound only | ||||||
| 14 | Tsukiyono IC | 131.1 | 115.0 | Minakami | ||||||
| PA | Shimomoku PA | 135.5 | 110.6 | |||||||
| BR | Ōmine Bridge | ↓ | ↑ | Length: 784 m | ||||||
| 15 | Minakami IC | 141.0 | 105.1 | |||||||
| PA | Tanigawadake PA | 146.0 | 100.1 | |||||||
| TN | Kan-Etsu Tunnel | ↓ | ↑ | Nerima-bound 11,055 m Nagaoka-bound 10,926 m | 70 km/h | |||||
| Yuzawa | Niigata | |||||||||
| PA | Tsuchitaru PA | 157.5 | 88.6 | 80 km/h | ||||||
| 16 | Yuzawa IC | 167.0 | 79.1 | ○ | ||||||
| TN | Ishiuchi Tunnel | ↓ | ↑ | Nerima-bound 1,590 m Nagaoka-bound 1,502 m | Minami- uonuma | |||||
| SA | Shiozawa- Ishiuchi SA | (173.5) | 72.3 | Nerima-bound only | ||||||
| 16-1/ SA | Shiozawa- Ishiuchi IC/SA | Pref. Route 28 (Shiozawa Yamato Route) | 175.5 | 70.6 | SA: Nagaoka-bound only | |||||
| BR | Nakanojima Bridge | ↓ | ↑ | Length: 460 m | ||||||
| 17 | Muikamachi IC | 186.9 | 59.2 | ○ | ||||||
| BR | Hakkai Bridge | ↓ | ↑ | Length: 610 m | ||||||
| 17-1/ PA | Yamato PA/ SIC | 198.3 | 47.8 | |||||||
| 18 | Koide IC | 204.4 | 41.7 | ○ | Uonuma | |||||
| 18-1/ PA | Horinouchi IC/PA | Pref. Route 84 (Horinouchi Inter Route) | 212.1 | 34.0 | ||||||
| BR | Kawaguchi Bridge | ↓ | ↑ | Nagaoka | ||||||
| 19/SA | Echigo-Kawaguchi IC/SA | Pref. Route 83 (Kawaguchi Shiodono Route) | 220.9 | 25.2 | ○ | |||||
| TN | Yamamotosan Tunnel | ↓ | ↑ | Nerima-bound 1,838 m Nagaoka-bound 1,804 m | Ojiya | |||||
| 20 | Ojiya IC | 228.8 | 17.3 | ○ | ||||||
| 100 km/h | ||||||||||
| PA | Yamaya PA | 230.9 | 15.2 | |||||||
| BS | Katakai BS | 235.0 | 11.1 | ○ | ||||||
| BS | Koshiji BS | 238.5 | 7.6 | ○ | Nagaoka | |||||
| 20-1 | Nagaokaminami- Koshiji SIC | Pref. Route 23 (Kashiwazaki Takahama Horinouchi Route) | ↓ | ↑ | ||||||
| 21 | Nagaoka IC | Pref. Route 86 (Nagaoka Inter Route) | 244.5 | 1.6 | ○ | |||||
| 80 km/h | ||||||||||
| (37) | Nagaoka JCT | Hokuriku Expressway | 246.1 | 0.0 | ||||||
| Through to Hokuriku Expressway | ||||||||||