Report: Lingering fatigue increases risk of depression

The Japanese government's annual report on karoshi, or death from overwork, has found that workers who still feel fatigued the morning after shifts are at a greater risk of depression. It urges companies to provide their employees with ample time to rest and recover.

The government on Friday released a white paper studying karoshi. The report includes the results of a survey of over 9,800 people, including company employees and self-employed workers, on their mental states.

Of respondents who work between 20 and 40 hours a week, 53 percent said they "sometimes carry over fatigue from the previous day to the next morning." For those who work between 40 and 60 hours a week, this percentage rose to 60, while for those who worked 60 or more hours a week it climbed to 69.

Of respondents who said they "always carry over fatigue from the previous day to the next morning," 82 percent said they believe they suffer from depression, anxiety, or exhibit depressive tendencies.

The report also said respondents who felt they did not get enough sleep were more likely to have a lower sense of well-being.

The government has issued an annual karoshi report since 2016, following the implementation of a 2014 law aimed at preventing such deaths.