Seasonality in mood and behaviours of Japanese residents in high-latitude regions: transnational cross-sectional study

摘要

BackgroundDaylight hours in high-latitude regions tend to be longer than those in Japan in summer, and shorter than those in Japan in winter. For example, daylight hours in London in winter are one-third those of Tokyo. Therefore, this study investigated and compared seasonal changes in mood and behaviours of Japanese individuals living in and outside Japan.