タイトルアイコンBreakwater Building Process

Breakwater is an installation that protects the port by preventing large sea waves from hitting the port, enabling ships to load and unload cargo to and from the ship even when the sea outside the port is rough.


Caissons, huge concrete boxes that weigh 3,000 tons and are 20m high each, are lined up to make a breakwater. The caissons are made on the ship called a "floating dock"


Pile up stones on the seabed to make the base for caissons.


Pull the caisson by the ship to the designated location.


Sink the caisson by filling it with water and pour sand in it to make it heavy so that it would not move. Close the caisson with a concrete lid.


Finally, put blocks that absorb the force of wave to complete.

Contact Us
Inquiry using a form
Inquiry Form
Inquiry by phone
Assistance Service Desk of the Sea and Port
Toll-free number Hours of operation 0120-497-370 Also accessible from Mobile and PHS
Sea Wave Information in Ports(Real-time)
Sea WaveYou have access to the real-time wave information at all ports in Japan. Broadcasted by The Nationwide Ocean Wave information network for Ports and Harbors (NOWPHAS)
QR CODE"You can check the information of waves in the Hokuriku region from your mobile phone.