Have you ever heard of the word “Black Company”? The origin of this word is Japanese and it refers to a company which doesn’t follow the Labor Standards Law. According to Ministry of Health, Labor and Welfare, the number of workers suffered from Black companies in 2012 was 1,067,210. Some of them got diseases, some mental problems or others lost their lives, so I think that we must do something against them as soon as possible. In this essay, I will explain the reasons why the problems that they have today and the measures against them.