noun
coastal waters; inshore waters; sea along the coast
Refers to the sea area near the coast, often used in maritime, fishing, or environmental contexts.
沿海の漁業資源を守る必要がある。
We need to protect the fishery resources in coastal waters.
noun
Refers to the coastal land or region itself, rather than the water. Often used in compound terms like 沿海地域 (coastal region).
沿海地域では津波への備えが重要だ。
In coastal areas, tsunami preparedness is important.