This article explores the working hours in Japan, the factors influencing them, and the benefits of a shorter work week. It is reported that the average worker in Japan puts in about 44 hours per week, including overtime which has been steadily increasing since the 1990s. The culture of long work days, lack of labor regulations and expectations from employers are some of the factors influencing working hours in Japan. Overtime can have a significant impact on health and wellbeing of Japanese workers with studies linking it to depression, anxiety and other mental health issues as well as physical health issues such as cardiovascular disease. Shorter work weeks could lead to increased productivity for employers while providing employees with less stress and burnout, higher levels of leisure time and better overall mental health outcomes. Tips on how to reduce one's working hours in Japan are also provided.