| 词条 | Japan National Route 257 |
| 释义 | {{Infobox road |country=JPN |type=National |route=257 |maint= |alternate_name=国道257号 |map= |image=R257 Shitara Ohashi.JPG |length_km=241.6 |length_round= |length_ref= |established= |direction_a= |terminus_a= |junction= |direction_b= |terminus_b= |browse= }} National Route 257 is a national highway of Japan connecting Nishi-ku, Hamamatsu and Takayama, Gifu in Japan, with a total length of 241.6 km (150.12 mi). {{commonscat|Route 257 (Japan)}}{{Japan-road-stub}} 1 : National highways in Japan |
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