In February 2010, the Japan Institute for Labour Policy and Training surveyed employees about their working hours. Among those who worked overtime almost every day or three to four days a week, 9.8 percent of non-managers and 6.2 percent of managers gave this reason: Shūi ga zangyō shite iru node, saki ni kaerizurai kara. Others are working overtime, so it is hard to go home first. Each person could give up to three reasons.
The report, published in 2011, also looked at the statement Jōshi ga taisha suru made kitaku shinai, I do not go home until my boss leaves. For both non-managers and managers, agreeing with it went with ten or more extra hours of work a month.