The method of amplifying ship generated waves with both wave concentration structures and a reef to obtain sufficiently high waves for surfing is discussed to build surf points also in a calm area of coastal zone. The most appropriate condition of waves for surfing is defined according to the questionnaire to local surfers in Kagoshima, Japan. The most effective shape of the structures is determined through numerical calculation of amplification factors of wave height. Numerical computations,

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... well as hydraulic experiments, of ship generated waves amplified using the structures are performed, resulting that it is feasible to build a surf point in Kagoshima Bay by amplifying waves generated by the ferries through the presented method with the structures which consist of the wave concentration structures and the reef.