Abstract
Holding side jobs or changing jobs can be an option when considering career building. However, it is still unclear how career development through holding side jobs and job changes affect the subjective well-being of working people. In this study, we conducted a questionnaire survey of working adults with the aim of clarifying the effects of holding side jobs and changing jobs on subjective well-being. First, we examined side jobs, and found that the subjective well-being of the group with side jobs was significantly lower than that of the group without side jobs. Regarding the reason for the side jobs, only those who answered "to contribute to society" showed higher subjective well-being than those who did not have side jobs, while those who answered other reasons for the side jobs showed lower subjective well-being. Next, we examined job changes. The results showed that subjective well-being and career satisfaction decreased as the number of job changes increased. Subjective well-being and career satisfaction were lower among those who reported that they changed jobs because of dissatisfaction with the company, job content, or interpersonal relationships in the workplace. These findings may help us to think about happy work styles, including holding side jobs and changing jobs.
https://ror.org/01ch6q924 
