 | This article relies largely or entirely on a single source. (October 2024) |
 | You can help expand this article with text translated from the corresponding article in Japanese. (October 2024) Click [show] for important translation instructions.
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| 国道146号 | ||||
| Japan Romantic Road | ||||
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 Route 146 in Karuizawa | ||||
| Route information | ||||
| Length | 30.2 km[1] (18.8 mi) | |||
| Existed | 1953–present | |||
| Major junctions | ||||
| South end |  National Route 18 in Karuizawa, Nagano | |||
| North end |   National Route 144 / National Route 145 in Naganohara, Gunma | |||
| Location | ||||
| Country | Japan | |||
| Highway system | ||||
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National Route 146 is a national highway of Japan connecting Naganohara, Gunma and Karuizawa, Nagano in Japan, with a total length of 30.2 km (18.77 mi).
- ^ "一般国道の路線別、都道府県別道路現況" [Road statistics by General National Highway route and prefecture] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 19 February 2020.