U means “existence” and ji means “time,” so uji means “existent time,” or “existence-time.” In this chapter Master Dogen teaches us the meaning of time in Buddhism. As Master Dogen explains in other chapters, Buddhism is realism. Therefore, the view of time in Buddhism is always very realistic. Specifically, time is always related with existence and existence is always related with momentary time. So in reality, the past and the future are not existent time; the present moment is the only existent time – the point at which existence and time come together. Also, time is always related with action here and now. Action can only be realized in time, and time can only be realized in action. Thus, the view of time in Buddhism reminds us of existentialism in modern philosophy. It is very important to understand the Buddhist view of time in order to grasp the true meaning of Buddhism.