In the previous report the authors discussed a few problems involved in the Newman-Sharma's method, a method of wave analysis, and exhibited some examples of application of this method. The examples of application which are reported in the previous paper and the prevent paper are likely to show effectiveness of this method. The real wave-making characteristics of a ship are obtained by calculating the spectrum and the amplitude functions of free wave from the measured wave profiles. The authors study here the problem of determination of the equivalent source distribution from the amplitude function of free wave.