To investigate the effects of digestion by Asiatic black bears (Ursus thibetanus) on seed germination, we conduct germination test in laboratory using Uwamizuzakura (Prunus grayana) seeds from August 2006 to February 2007. We used three different mother trees and treated the seeds with four methods; they are “digested seeds”, “extracted seeds”, “juiced seeds”, and “intact seeds”. Single-factor ANOVA method was used for statistical analysis. In our study, we concluded that digested seeds by bears showed higher germination rate (86.1 ± 12.0SD) than extracted seeds (66. 7 ± 8. 9SD), while juiced seeds showed lower germination rate (10.2 ± 4.5SD) and intact seeds showed zero level of germination rate (0%). Our research also proved that seeds taken from different mother trees did not have significant influence on their germination rate. It is understood that the pulp juice and the endocarp have hindered the germination of the seeds of Uwamizuzakura trees. The difference of the germination rate of the seeds which passed the digestive system of the bear and those which have been removed their endocarp was not clear, but it may be thought that the germination rate was improved by passing the digestion system of the bear.