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|---|---|---|---|---|
| 国道257号 | ||||
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| Route information | ||||
| Length | 241.6 km[1] (150.1 mi) | |||
| Existed | 1 April 1963–present | |||
| Major junctions | ||||
| North end |  National Route 158 near Takayama, Gifu | |||
| South end |  National Route 1 in Chūō-ku, Hamamatsu | |||
| Location | ||||
| Country | Japan | |||
| Highway system | ||||
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National Route 257 is a national highway of Japan connecting Chūō-ku, Hamamatsu and Takayama, Gifu in Japan, with a total length of 241.6 km (150.1 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 18 February 2020.