In the previous papers by the present authors, it was shown that a particular shape of the thin submerged plate (a “Crescent type”) would be the best one for concentrating ocean wave energy at a certain focal zone. This was demonstrated by performing some foundamental hydraulic tests as well as some numerical simulation. However, in order to proceed further to next practical step, it might be thought that the wave force distribution around the structure should be clarified in detail, and at the same time, an appropriate design procedure should be implemented. Therefore, in the present paper, the wave force distribution will be studied by both experimental and theoretical methods in the first place. And subsequently a necessary design procedure for the plate, including its actual construction method, will be described. Some design proposals will be reported for the site conditions of representative coastal areas in Japan.