Abstract
The Japanese Ministry of Transport has been developing a wave power extracting caisson breakwater. A test breakwater was constructed in the summer of 1989 in Sakata Port and the field experiment began in the winter of 1989.
The first stage of the experiment was successfully completed in 1991. The design and construction as well as the operation of the system were demonstrated by the experiment. The field experiment was extended to investigate remaining problems, especially the way to utilize the converted power.
This report describes the results of the second stage experiment, which includes a large scale water pumping test and a prototype-test to connect the wave power to commercial electric power lines.
