Although there is now considerable research concerning organizational citizenship behavior (OCB), little is known about the possibility of the transposition of such a research topic to a Japanese context. This study proposes and substantiates a three-dimension model of OCB in the Japanese context, comprising voluntary involvement, generalized compliance, and personal industry. Furthermore, the examination of the relationship between organizational commitment and OCB indicates that affective commitment is positively associated with voluntary involvement and personal industry. Also, continuance commitment is positively related to generalized compliance and, simultaneously, negatively associated with voluntary involvement. Finally, theoretical and practical implications are discussed.