海路 (kairo) means “sea route” | MotiTan Japanese Dictionary

More examples

新しい海路が地域の発展を支えています。atara shi i kai ro ga chi iki no hat ten o sasa e te i ma su

A new sea route is supporting the development of the region.

Describes the sea as a route along which people or goods travel between places.

航路kōro: A planned route followed by ships between ports or other coastal places.

海上を船で通って人や物を運ぶための経路。kai jō o fune de kayo tte hito ya mono o hako bu ta me no kei ro

海 (kai, "sea") and 路 (ro, "route") combine in a Sino-Japanese compound for a route across the sea.

海路 (kairo) is a formal term that appears more often in historical, literary, or shipping contexts than in casual conversation.