Translation guide
A barrier built to protect the coast from erosion or flooding. In Japanese, the most common and direct term is 防潮堤 (ぼうちょうてい), but other words exist depending on context and scale.
A structure built along the shore to prevent flooding and erosion, especially from storm surges or high waves.
The standard term for a seawall designed to protect against tides and storm surges. Used in official and technical contexts.
This seawall was built to protect the town from tsunamis.
A general term for embankment or levee, often used for riverbanks but also for coastal protection. Can refer to a seawall in context.
The embankment along the coast prevented the storm surge.
Refers to revetment or shore protection works, often sloping structures that prevent erosion. More about stabilizing the shoreline than blocking waves.
Revetment work was carried out, and coastal erosion stopped.
Breakwater, usually offshore, designed to break the force of waves. Not a seawall on the shoreline, but sometimes confused.
防波堤 is a breakwater, not a seawall. Use only when referring to offshore structures.
A breakwater was constructed outside the harbor.
A massive seawall specifically built to protect against tsunamis, often seen in areas affected by the 2011 disaster.
A simple wall or barrier by the sea, not necessarily a major engineering project.
Literally 'tide prevention wall'. Can refer to smaller walls or barriers, sometimes temporary.
A seawall was installed along the coast.
防潮堤 is specifically for coastal protection against tides and tsunamis. 堤防 is a general embankment, often for rivers but also coasts. 護岸 is revetment, focusing on erosion control rather than wave blocking.
Building a tsunami seawall costs an enormous amount of money.