We human beings cannot live without water. But because of the recent population increase and industrial expansion, the water environment has been getting worse. Now we can see environmental water problems such as acid rain, and biological and industrial drainage, which deteriorate water quality. Water quality change, affects human life as well as the larger ecosystem, so we have to examine it.Natural water in the mountain field may not be affected by artificial environmental forces. But if this natural water is adversely affected, we should determine and try to resolve the pollutant cause.Therefore, since 1993, we have investigated the water quality of precipitation (snow and rain) and the springs of Mt Fuji, the Japanese symbol.(Our methods were sampling and chemical analysis.) This report presents thenatural water environment of Mt. Fuji, based on analysis of sampled rain and springs in 1993 and 2001.