Nutrient dynamics in alpine ecosystems during snow free period was evaluated on a summit of Mt. Tateyama, central Japan. We observed rain and fog precipitation, throughfall of Pinus pumila vegetation at Jodo-daira (36.566 N, 137.606 E, 2839 m a.s.l.). In the higher altitude region, concentrations of acidic components of rain were lower than the lower region. However, the total acid deposition to Jodo-daira was about the same as to the base plain region because of the increase in the amount of rainfall. The influence of transboundary pollution to the mountain area was suggested. About 80% of ammonia nitrogen and nitrate nitrogen in the rain and fog water were absorbed from leaf surface of P. pumila. It was predicted that most of the cation component of the throughfall is derived from the atmospheric dry depositions and elements that transported from root and reached from the tree. The results of Sr isotopic analysis showed that the isotopic ratio of throughfall was quite similar to rainwater and fog water and sea salt rather than underground water. It was suggested that the most of the nutrient supply to the P. pumila community in Tateyama is from the atmospheric deposition and the supply from bedrock is negligible.