It is important to clarify the effect of the climate change on the nutrient cycle in forest soils. Japan archipelago is divided into two regions by central mountain chains, one is Japan Sea side with a lot of snowfall, and the other is Pacific Ocean side with a little snowfall in winter. It is hypothesized that winter nitrogen dynamics differs according to these gradients of snowfall and soil freezing due to the insulation of snowpack. In this study, soil transport and exchange experiments were conducted with forest surface soils from 10 sites from Hokkaido to Kyushu islands using in situ resin core method. In the soil transport experiment, all soil samples were incubated in the heavy snowfall without soil freezing and in the less snowfall with soil freezing from Nov 2010. We collected the resin cores in Jan, Apr and Aug 2011 to quantify the inorganic nitrogen production in each period. The net ammonium production of all soils was higher in the freezing site than in the un-freezing site, while the nitrate production was smaller in the freezing site in winter (Nov-Apr). On the other hand, nitrate production was accelerated in freezing site in Apr-Aug. Our results suggested that the activities of nitrification bacteria were restrained under the soil freezing-thawing condition, especially in soils with high gross nitrification rate.