A Romanized Japanese word for ''日勤教育'', which
literally means day-shift
education, carried out often by Japanese companies or organizations.
After Amagasaki Derailment, It's being claimed to be Unfair, Lack of human rights, and pointless punishments such as sweeping
floor or standing in hot sun, resulting in lack of employees.
Happens especially often at JR West and its branch departments.
It now happens very secretly because it could be pointed as an offense to the law if being found.