This paper describes the relationship between the upper wind (at about 1500-2000 m high) and the rainfall distribution around isolated conical mountains. The data collected around Mt. Waita (Oita prefecture) and Mt. Sakuraijma (Kagoshima prefecture) were analysed and the following results were obtained. (1) The depth of rainfall on the windward side of the summit of mountain is more than on the leeside. In particular, it becomes more remarkable in case of the westerly wind around Mt. Waita and under the southerly wind around Mt. Sakurajima. (2) The shape of Mt. Waita is almost the same as Mt. Sakurajima. But, the depth of rainfall on the leftside of the main wind direction is more than on the rightside, while, the converse is true around Mt. Sakurajima. These phenomena seem to reflect the influence of the topography on the windward areas.