75, 0.1390 and 0.1400, in the upper panel in Fig. \[AxialVectorC\], where the vertical axis denotes $g_V^{0\pm}$ and the horizontal one the squared pion masses. (These values are also listed in Table \[fittedval\].) The vector charges should be unity if the charge conservation is exact, whereas we can actually find about 10% deviations in Table \[fittedval\] or in the upper panel in Fig. \[AxialVectorC\]. Such unwanted deviations are considered to arise due to the discretization errors: The present lattice spacing is about 0.15 fm, which is far from the continuum limit. In fact, the decay constants obtained with the same setup as ours deviate from the continuum values by ${\cal O}(10)$%. We should then count at least 10% ambiguities in our results. The axial charge $g_A^{0+}$ of the positive parity nucleon is also shown in the lower panel in Fig. \[AxialVectorC\]. As found in the previous lattice studies, the axial charge of the positive parity nucleon shows little quark-mass dependence, and they lie around the experimental value 1.26.

We finally show the axial charges of the negative-parity nucleon resonances in the lower panel in Fig. \[AxialVectorC\]. One finds at a glance that the axial charge $g_A^{0-}$ of $N^*(1535)$ takes quite small value, as $g_A^{0-}\sim {\mathcal O}(0.1)$ and that even the sign is quark-mass dependent. While the wavy behavior might come from the sensitiveness of $g_A^{0-}$ to quark masses, this behavior may indicate that $g_A^{0-}$ is rather consistent with zero. These small values are not the consequence of the cancellation between u- and d-quark contributions. The u- and d-quark contributions to $g_A^{0-}$ are in fact individually small, which one can find in the columns named as $g_A^{0-(u)[{\rm lat}]}$ and $g_A^{0-(d)[{\rm lat}]}$ in Table \[fittedval\]. We additionally make some trials with lighter u- and d-quark masses at $\kappa$=0.1410. Since we have less gauge configurations and the statistical fluctuation is larger at this kappa, we fail to find a clear plateau in the