Sports paraphernalia manufacturers Polar Electro recently released a rather fascinating study compiled from data taken with their Polar A370 and Polar M430 fitness trackers used in 28 countries. The findings show that Japanese men and women sleep an average of six hours and 35 minutes each night, which is about 45 precious snoozing minutes less than the study average.
Compared to Finland, which was found to have the most hours of sleep per night, Japan basically lost nearly an hour every night. In Finland, men get an average of seven hours and 24 minutes of sleep. Women from Finland and Belgium tied with an average of seven hours and 45 minutes.
Israel and Hong Kong are among the other most sleep-deprived countries, with men in each country getting about six hours and 42 minutes. Women in Hong Kong get around six hours and 59 minutes per night, and Israeli ladies manage around six hours and 51 minutes.
As a general rule, most nations get around seven hours of sleep per night, which makes Japan’s national average fairly shocking. There are a number of hypotheses on why the country is so sleep deprived, including the long working hours and long commutes. Traditional Japanese working culture also places a strong emphasis on compulsory social events where alcohol is typically consumed, which could also contribute to the sleeplessness.
Although Japan might be a nation of under-sleepers, it’s not a country of early risers (especially in the cities). Much of the sleep loss occurs because Japanese people are going to bed much later than their international counterparts. Men in Hong Kong, Brazil, China and Spain were the only groups found to go to bed later than Japanese men. For women, only Hong Kong and Spain stay up later.
As this data was taken from fitness tracking devices, it’s fair to assume that it might be skewed toward the more fitness minded. However, the comparisons are still fascinating.