noun
sea lane
A maritime route used for commercial or military shipping; a direct loanword from English.
中東の石油は重要なシーレーンを通って日本に運ばれる。
Oil from the Middle East is transported to Japan via important sea lanes.
Variant with a middle dot, sometimes seen in formal or explanatory contexts.
航路 is a broader native Japanese term for any shipping route or course, while シーレーン specifically refers to strategic maritime passages.
Borrowed from English 'sea lane'.