Translation guide
A sea route is a navigable path across the sea, often used for shipping, travel, or trade. In Japanese, the most common equivalent is 航路 (こうろ), but other terms exist depending on context.
A path or course taken by ships across the sea.
The most common and general term for a sea route, used for shipping lanes, ferry routes, and navigation paths.
A regular route used by commercial shipping for transporting goods.
航路 covers both general sea routes and specific shipping routes. It is the standard term in maritime contexts.
A scheduled route for ferries or passenger ships.
航路 is also used for ferry routes. It can be combined with the ferry name or destination.
航路 (こうろ) is the standard modern term for any sea route, including shipping lanes and ferry routes. 海路 (かいろ) is more literary and often implies travel by sea in a historical or poetic sense. In everyday conversation about routes, stick with 航路.
Do not translate 'sea route' word-for-word as 海の道 (うみのみち) or 海道 (かいどう). While 海道 exists in some place names (e.g., 北海道), it is not used for navigable routes. Use 航路 instead.
この航路は貨物船がよく使う。
This sea route is often used by cargo ships.
新しい航路が開拓された。
A new sea route has been pioneered.
Literally 'sea road', often used in historical or literary contexts, or when emphasizing travel by sea as opposed to land.
彼は海路で日本に渡った。
He traveled to Japan by sea route.
Loanword from English 'sea lane', used in geopolitical or military contexts, such as 'sea lane defense'.
シーレーンの安全確保は重要だ。
Securing sea lanes is important.
この航路はアジアとヨーロッパを結んでいる。
This sea route connects Asia and Europe.
A more explicit phrase meaning 'maritime transport route', used in business or logistics contexts.
新しい海上輸送ルートの開設が検討されている。
The establishment of a new sea transport route is being considered.
このフェリーの航路は東京から北海道までだ。
This ferry route is from Tokyo to Hokkaido.
Specifically 'ferry route', commonly used in travel information.
台風のため、フェリー航路が欠航になった。
The ferry route was canceled due to a typhoon.