Recent results for few-nucleon bound state and scattering observables based on modern realistic nucleon forces are briefly reviewed. When a parameter of the three-nucleon (3N) forces are artificially adjusted by reproducing the triton binding energy some 3N scattering obsevables are reflected. One of the most pronounced cases is well known as a Sagara discrepancy where the minimum of the pd scattering differential cross section is larger than the theoretical predictions of only using NN interaction. Here we demonstrate some other cases in the different system, for example, the electron scattering on the ~3He target and pd capture reactions. We introduce a potential of the chiral perturbation theory. The Lagrangian derives NN potential and 3N force.
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