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Business trends

Workers' 'sleep debt' rouses Japanese companies into action

Employers can monitor snores for thousands of dollars a year

Teijin's wearable sleep examination device. The company is one of many looking to address the growing problem of "sleep debt."

TOKYO -- Japanese medical device makers are offering corporate services to help employees deal with "sleep debt," the cumulative lack of sleep that is harmful to health and, ultimately, productivity at work. 

Since around 2010, when smartphones began to spread, video streaming and other services have been keeping eyes glued to screens. As a result, the quality of sleep has suffered, a worrying development for companies.

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