View source for Japan National Route 18

{{Infobox road
|state=Japan
|type=National
|route=18
|name_notes={{nihongo|国道18号|Kokudō jūhachi-gō}}
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|length_km=194
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|customcommons=Route 18 (Japan)
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'''National Route 18''' is a [[National highways of Japan|national highway]] connecting [[Takasaki, Gunma]] and [[Jōetsu, Niigata|Joetsu, Niigata]] in [[Japan]].
==Route Data==
*Length: 194 km (120.6 mi)
*Origin: [[Takasaki, Gunma|Takasaki City]] (originates at junction with [[Route 17 (Japan)|Route 17]])
*Terminus: [[Joetsu, Niigata|Joetsu City]] (ends at Junction with [[Route 8 (Japan)|Route 8]])
*Major cities: [[Komoro, Nagano|Komoro]], [[Ueda, Nagano|Ueda]], [[Chikuma, Nagano|Chikuma]], [[Nagano, Nagano|Nagano]]

==History==
*[[1952-12-04]] - First Class National Highway 18 (from [[Takasaki, Gunma|Takasaki]] to [[Joetsu, Niigata|Joetsu]])
*[[1965-04-01]] - General National Highway 18 (from [[Takasaki, Gunma|Takasaki]] to [[Joetsu, Niigata|Joetsu]])

==Municipalities passed through==
*[[Gunma Prefecture]]
**[[Takasaki, Gunma|Takasaki]] - [[Annaka, Gunma|Annnaka]]
*[[Nagano Prefecture]]
**[[Karuizawa, Nagano|Karuizawa]] - [[Miyota, Nagano|Miyota]] - [[Komoro, Nagano|Komoro]] - [[Tomi, Nagano|Tomi]] - [[Ueda, Nagano|Ueda]] - [[Sakaki, Nagano|Sakaki]] - [[Chikuma, Nagano|Chikuma]] - [[Nagano, Nagano|Nagano]] - [[Obuse, Nagano|Obuse]] - Nagano - [[Iizuna, Nagano|Iizuna]] - [[Shinano, Nagano|Shinano]]
*[[Niigata Prefecture]]
**[[Myōkō, Niigata|Myōkō]] - [[Jōetsu, Niigata|Jōetsu]] - Myōkō - Jōetsu

==Intersects with==
*[[Gunma Prefecture]]
**Routes [[Route 17 (Japan)|17]], [[Route 354 (Japan)|354]] and [[Route 406 (Japan)|406]]; at Takasaki City
*[[Nagano Prefecture]]
**[[Route 146 (Japan)|Route 146]]; at Karuizawa Town
**[[Route 141 (Japan)|Route 141]]; at Komoro City - Ueda City
**Routes [[Route 143 (Japan)|143]], [[Route 144 (Japan)|144]] and [[Route 152 (Japan)|152]]; at Ueda City
**[[Route 403 (Japan)|Route 403]]; at Chikuma City
**Routes [[Route 19 (Japan)|19]], [[Route 117 (Japan)|117]] and 406; at Nagano City
*[[Niigata Prefecture]]
**[[Route 292 (Japan)|Route 292]]; at Myoko City
**[[Route 405 (Japan)|Route 405]]; at Joetsu City
**Routes [[Route 8 (Japan)|8]] and [[Route 350 (Japan)|350]]; at the terminus in Joetsu City

==Bypasses==
Among other sections already finished, a bypass running on the west side of the [[Chikuma River]] from the extreme  southern part of [[Nagano City]] to [[Ueda]] is currently under contruction.  As of 2008, only a small amount of sections of this bypass has been completed.  The completed sections are in [[Ueda]], just west of the [[Chikuma River]], and in [[Chikuma]] from Inariyama to just south of Yawata.

{{Japan-road-stub}}

[[Category:National highways in Japan|018]]

[[ja:国道18号]]