KaroshiKaroshi, or death from overwork, is perhaps the worst worker outcome of organizational stress in Japan. Japan's Act of Promoting Measures to Prevent Death and Injury from Overwork defines Karoshi as "death due to cerebrovascular or heart disease brought on by an overload of work, or death by suicide related to mental disorder from the intense psychological burden at work" (Ministry of Health, Labour, and Welfare, 2019d). Karo-jisatsu is suicide caused by a work-related mental disorder, and it is usually separated from Karoshi (Iwata, 2009;Komorida, 2016). According to the 2018 Status Report of Industrial Accident Compensation for Karoshi (Ministry of Health, Labour and Welfare, 2019e), the number of Karoshi incidents, legally admitted as compensable by insurance, amounted to 82 in 2018 as compared to 160 incidents in 2002, while the number of Karo-Jisatsu, including attempted suicide, rose from 43 in 2002 to 76 incidents in 2018.
Similarities and Differences between Karoshi and Karo-JisatsuThere are similarities and differences between Karoshi and Karo-Jisatsu. According to the Ministry of Health, Labour, and Welfare (2019e), one of the similarities is that most workers who died from Karoshi or Karo-Jisatsu are men in regular employment. As for differences, a vast majority of Karoshi victims are in their 40s and 50s; whereas, Karo-Jisatsu tends to occur in all age groups. Employees who died from Karoshi are concentrated in the mailing and transportation industry; whereas, those who died from Karo-Jisatsu are distributed across a wide variety of industries -such as manufacturing, retail, lodging, and wholesale. In addition, many of the workers who died from Karoshi put in more than 60 hours of work per week, although Karo-Jisatsu occurred even among those who worked only a few hours of overtime in a day.
Causes of Karoshi and Karo-JisatsuPrevious studies suggest that working long hours is a significant cause of Karoshi (Kanai, 2008). Long hours generally reduce sleep time, while