This article examined how knowledge of the Model of Human Occupation (MOHO) has been cited in the Japanese articles on occupational therapy. Investigation of 143 original articles in the first and second editions of MOHO found that information about ‘MOHO concepts' and ‘systems concepts' were quoted more frequently. In the MOHO second edition, the information about ‘assessment methods' and ‘reasoning process' was quoted in the articles. In the MOHO third edition, it was also found that information on ‘MOHO concepts' and ‘assessment methods' was quoted more frequently, while information on ‘development of occupational behavior', ‘process of occupational participation', ‘occupational narrative', and ‘intervention process' were quoted in the articles. However, in the MOHO fourth edition, it was found that information on ‘MOHO concepts' was quoted the most frequently in the articles, while a variety of information (i.e., ‘MOHO-based program development') was quoted generally and widely. These results indicate that MOHO knowledge was used widely by occupational therapists for completing assessments, reasoning, providing occupational therapy intervention, and MOHO-based program development. It was also found that the use of MOHO in occupational therapy had been established in Japan for a quarter century.
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