Model of HumanOccupation, Japanese version of the Model of Human Occupation Screening Tool, occupational participation.Introduction: The purpose of this study was to clarify the structural aspect of the construct validity of the Japanese version of the Model of Human Occupation Screening Tool.Method: The Japanese version of the Model of Human Occupation Screening Tool was examined using a Rasch model and confirmatory factor analysis. Demographic variables and scores on the Japanese version of the Model of Human Occupation Screening Tool and the Functional Independence Measure were retrieved from 115 clients in rehabilitation wards.Findings: The results of our study indicate that the Japanese version of the Model of Human Occupation Screening Tool effectively assesses clients' ability to engage in activities of daily living and their occupational participation as a dynamic process of engaging in these activities. The level of correlation between the Japanese version of the Model of Human Occupation Screening Tool and the Functional Independence Measure indicates that the former is able to effectively evaluate occupational participation. The structure of the items within the Japanese version of Model of Human Occupation Screening Tool was found to be commensurate with the structure of the Model of Human Occupation.Conclusion: The Japanese version of Model of Human Occupation Screening Tool is a useful assessment tool for assessing occupational participation.