Abstract: The effects of different forest conditions on soil macroporosity and soil hardness was investigated in natural and artificial forests in the Ehime University Forest, Japan. Eleven treatments were established based on forest type and stand density of Japanese cedar and cypress. Stand density was indicated by relative yield index (Ry), function of standing volume and stem density. General Linear Model Analysis of SPSS was used to test whether differences in soil macroporosity and soil hardness were statistically significant in different treatments, followed by Tukey HSD in case of significance. Results showed that in topsoil, natural forest, Japanese cedar and cypress with Ry comprised between 0.50 and 0.60 had the highest means of soil macroporosity. The lowest means were found in Japanese cedar with Ry: 0.70-0.80 and Japanese cedar and cypress with Ry: 0.80-0.95. Soil hardness did not have notable differences among the treatments except for Japanese cedar and cypress with Ry: 0.80-0.95 where means were higher than in others. In general, subsoil did not differ in areas with different forest conditions. These results suggest that thinning operations are needed in areas with high Relative yield Index (Ry > 0.70, corresponding to excessive density forest) where poorer soil properties were found.