The present study examined how job satisfaction and exhaustion are affected by motivational regulation and style in the part-time jobs of international students in Japan, based on self-determination theory. A multivariate regression analysis, which included five motivational regulations as independent variables and job satisfaction and exhaustion as dependent variables, was conducted. The results showed that job satisfaction was positively correlated with intrinsic regulation and identified regulation and negatively correlated with introjected regulation. For exhaustion, a negative correlation was shown with intrinsic regulation, and a positive correlation was shown with extrinsic and identified regulation. The results of a cluster analysis based on five motivational regulations revealed four motivational styles. High motivational styles were shown to have the highest job satisfaction, and low intrinsic/high extrinsic styles were shown to have the highest exhaustion.