In the labor ministry's 2013 survey - its first ever - of 5,111 businesses
nationwide suspected of “black labor practices, 4,189 or 82.0 percent of the
total were found to have violated labor-related laws in one way or another ー
43.8 percent by imposing illegal overtime work on employees, 23.9 percent by
failing to pay workers for overtime and 1.4 percent by not taking steps to prevent
health hazards from overwork.