The purpose of this study was to develop a Japanese version of the Counselor Activity Self-Efficacy Scales through an analysis of their reliability and validity across a Japanese sample. The data for this study were collected from a sample comprising 50 first-year and 46 second-year graduate students pursuing their Master's degrees. The results indicated that a marginal difference existed between the Japanese and the original samples in the factor construction of the "Helping Self-Efficacy Scale." The "Session Management Self-Efficacy Scale" and the "Counseling Challenges Self-Efficacy Scale" exhibited identical factor constructions in these two samples, and the reliability and validity of these scales were also indicated. The scores of the latter two scales could be utilized to differentiate between students with differing levels of counseling experience. Implications for future research and training applications were considered.