The thermal and ground waters were sampled in the hot springs district of Hamamura-Katsumi and Shikano and in their neighborhoods. The water
temperatures were measured when they were sampled. Among the major chemical constituents, the chloride, sulfate, bicarbonate (methyl-orange alkalinity), calcium and magnesium content was determined. Furthermore, as the minor constituents, the arsenic and phosphorus content was also determined. The uranium, radium and radon content was determined in some samples of hot springs. Based on the results of chemical analysis, the relations between the chloride content and the content of other chemical constituents were cheked respectively. Positive correlations were found in the relations between water temperature-Cl(-), SO(4)(2-)-Cl(-), Ca(2+)-Cl(-) and As-Cl(-), although the ratios of each content showed the different characteristic in Hamamura-Katsumi compared with that in Shikano. In the samples of Hamamura-Katsumi where the thermal waters were pumped out from the sedimentary beds of volcanic rocks, the sulfate and calcium content was relatively richer compared with the content of these ions in the samples of Shikano where granitic rocks underlay as the basement in the fairly shallow depth from the cground surface. These characteristics were also noticed when the chemical compositions of other hot springs in the central part of Tottori prefecture were examined. In the neighborhood of the hot springs district mentioned-above, distinctive indications of hot spring were found at Kinashi which was placed between Hamamura and Shikano, comprehensively examining the content of chemical constituents in the ground water samples in this region.