Japan suffers an estimated annual economic loss of around ?1 trillion due to the “social jet lag” mismatch between sleep patterns on weekdays and holidays, according to a recent study.
The estimate comes from a University of Tsukuba research group that analyzed data from about 80,000 workers who use a sleep app on their smartphones.
According to the researchers, this is the first large-scale study to examine the relationship between sleep patterns and labor productivity. “Not only sleep duration but also sleep quality and irregular sleep schedules were found to be strongly associated with declines in labor productivity,” the group said.
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