| 释义 |
{{Infobox road
|country=JPN
|type=National
|route=451
|maint=
|alternate_name=国道451号
|map=
|image=Japan National Route 451, Hamamasu.jpg
|length_km=116.5
|length_round=
|length_ref=
|established=
|direction_a=
|terminus_a=
|junction=
|direction_b=
|terminus_b=
|browse=
}}National Route 451 is a national highway of Japan connecting Rumoi, Hokkaidō and Takikawa, Hokkaidō in Japan, with a total length of 116.5 km (72.39 mi). {{commonscat|Route 451 (Japan)}}{{Japan-road-stub}} 1 : National highways in Japan |