Black Companies [0] are a thing, but the discourse of Black Companies mostly serves to protect the mainline of Japanese work culture from the degree of criticism it deserves.

[0] A company so abusive of workers that it literally disgusts Japanese salarymen. Common elements include withholding pay, withholding pay for large amounts of mandatory overtime, ordering overtime in quantities sufficient to cause death by exhaustion, physical violence against staff, harassment of staff by management in a fashion far surpassing social norms, etc.