Japanese companies strongly implement the Japanese management style, which values time, rules, and seniority. Fun is often considered as irrelevant to work. At work, employees need to be serious,, and fun is perceived to hinder performance. However, contrary to the general view, fun is an important aspect for the employees during their working process. Fun can bring positive consequences to the organization. This study tries to examine the effect of fun at work on Job Satisfaction, Task Performance, and Organisational Citizenship Behaviour. The respondents are 141 employees working in Japanese companies in Indonesia, and the data processing and analysis process is performed using SEM (Structural Equation Modeling) method. The result of this study supports the previous preposition that fun can create positive consequences to work. Thus, fun is a relevant aspect in the workplace.