According to a research report published by Decision Advisors, the Japan seasonal affective disorder drugs market size is growing at a CAGR of 5.8% from 2025 to 2035. The seasonal affective disorder drugs market in Japan is driven by growing knowledge of mental health conditions, especially seasonal affective disorder, and improvements in medication. In addition, digital health solutions, such as smartphone apps that help track and treat SAD symptoms, are becoming more and more integrated.