日本国道(日语:国道こくどう kokudō */?),是由国家在《道路法》规范下指定的干线公路。分为下列两种类型:

日本平常所称的“国道”即指此类道路,《道路法》亦将其直接通称为“国道”。
由国家管理或以法令规范的自动车专用道路,均为高速公路

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