As a sequel to Ref 1, comparison between results of theoretical calculation and tank experiment was mainly carried out at the zone where encounter frequency approaches zero in following waves. Vertical shearing force, which was not dealt with previously, is included in this paper. Meanwhile, problem on following long crested irregular waves are also dealt with. The following are outlines of conclusions. 1) Calculated results by the widely used New Strip Method (NSM) or Ordinary Strip Method (OSM) for transfer function of vertical shearing force in following waves were compared to experimental results. This comparison shows bad agreement, worse than that in the case of vertical bending moment. Hence, these methods are regarded to be impracticable in following waves. 2) Transfer function of vertical shearing force by N (A), recommended in the previous paper to be a new practical method for vertical bending moment, shows a considerable difference from experimental results. Therefore, it can not be regarded as having practical precision of prediction on vertical shearing force. 3) In following waves, results of theoretical calculation of vertical wave loads transfer function at F _n=0 express experimental ones the best quantitatively in any ship speed. Hence, this approximate calculation can be recommended as a practical tentative one. 4) It is understood that there is still certain problem in calculation of diffraction forces and Froude Krylov forces in following waves by presently used theoretical methods. 5) By applying transfer function obtained from experiment, characteristics in long crested irregular following waves can be precisely predicted. In other words, despite the singular form of spectra in the encounter phenomena in following waves, the popular method of short term prediction based on the principle of linear superposition is proved with experimental evidence. 6) Encounter mean period, both obtained from estimated encounter spectra and measured directly from encounter time history, appear to be nearly identical. This means that it is possible to predict encounter mean period in long crested waves from encounter spectrum.