Translation guide
In Japanese, the word for 'highway' depends on the type of road. The most common term is 高速道路 (kōsoku dōro) for expressways, while 幹線道路 (kansen dōro) refers to major arterial roads. For general major roads, 公道 (kōdō) or 主要道路 (shuyō dōro) may be used. Note that 'highway' in English can be a broad term, but Japanese distinguishes between tolled expressways and other main roads.
A controlled-access highway, typically with multiple lanes and high speeds, often tolled.
I drove on the highway to get there faster. · The highway was closed due to an accident.
The standard term for expressways. Often abbreviated to 高速 (kōsoku) in casual speech.
高速道路で東京まで行きます。
I'll take the expressway to Tokyo.
この高速道路はいつも渋滞している。
This highway is always congested.
Short for 高速道路, used in casual conversation. Can also mean 'high speed'.
高速に乗ってすぐ着くよ。
We'll get there quickly if we take the expressway.
Used in proper names like 東名自動車道 (Tōmei Expressway). More formal or official.
東名自動車道は日本の大動脈です。
The Tomei Expressway is a major artery of Japan.
A main road that connects cities or regions, but not necessarily a controlled-access expressway.
The highway runs through the center of town. · They built a new highway to ease congestion.
Refers to arterial roads that form the backbone of the road network. Often used in urban planning contexts.
この幹線道路は交通量が多い。
This arterial road has heavy traffic.
A general term for 'main road' or 'major road'. Less specific than 幹線道路.
主要道路沿いに店が並んでいる。
Shops line the main road.
Means 'public road'. Can be used for highways in a legal sense, but not specifically expressways.
A numbered highway that is part of a national network, often called 'Route X' in English.
Take Highway 101 north. · The highway runs along the coast.
National highway, usually numbered. Not necessarily a high-speed road; can be a regular road with intersections.
国道1号線を南下してください。
Please go south on National Route 1.
この国道はよく渋滞する。
This national highway often gets congested.
Used in expressions like 'information highway' or 'highway to success'.
the information highway · highway to success
Literally 'road to ~', used metaphorically. Not a direct translation of 'highway' but conveys the idea.
成功への道は険しい。
The highway to success is steep.
Direct loan translation for 'information highway'. Understandable but not commonly used in natural Japanese.
This is a direct translation and may sound unnatural. Consider using 情報通信網 (jōhō tsūshinmō) for 'information network'.
情報ハイウェイの発展は目覚ましい。
The development of the information highway is remarkable.
高速道路 (kōsoku dōro) refers specifically to controlled-access expressways, usually tolled. 幹線道路 (kansen dōro) are major arterial roads that may have traffic lights and intersections. 国道 (kokudō) are national highways, which can range from multi-lane expressways to two-lane roads. When translating 'highway', consider the context: if it's a toll road, use 高速道路; if it's a main road, use 幹線道路; if it's a numbered route, use 国道.
In English, 'highway' can refer to any major public road. In Japanese, 高速道路 is specifically an expressway. Using 高速道路 for a regular main road would be incorrect. Use 幹線道路 or 主要道路 for non-expressway highways.
ルート66はアメリカの有名な国道です。
Route 66 is a famous highway in the US.
国道 is used for numbered national highways.
公道でのレースは禁止されている。
Racing on public highways is prohibited.