This is part of the reason why employees work such long hours in Japan. Overtime is largely unpaid for white collared workers. Coercing an employee to work ever

This is part of the reason why employees work such long hours in Japan. Overtime is largely unpaid for white collared workers. Coercing an employee to work ever-longer hours is effectively "free" (in the short term, until some start to physically and emotionally break down). Because changing jobs is so difficult in Japan, there's often no recourse for the worker.