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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 nearTakayama, Gifu | |||
| South end |  National Route 1 inChūō-ku, Hamamatsu | |||
| Location | ||||
| Country | Japan | |||
| Highway system | ||||
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National Route 257 is anational highway ofJapan connectingChūō-ku, Hamamatsu andTakayama, Gifu in Japan, with a total length of 241.6 km (150.1 mi).
A section of National Route 257 in the city ofToyota inAichi Prefecture is amusical road.[2]
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