Sado's death was made public by her employer this week but is expected to increase pressure on the country's work standards that lead to an alarming number of deaths, according to the Guardian. Last year, a young advertising agency employee's death was ruled as karoshi and in 2015, 24-year-old Matsuri Takahashi killed herself because of work-related stress after putting in over 100 hours of overtime in the months leading up to her Christmas Day suicide.