In this presentation, I will look at the background of Japanese "Labor Reform", discussions in the process of submission of relevant legislation and the contents of the most recently passed "labor reform" law. First, there was a long-term employment practice that guarantees full-time and full-time employment for regular workers in Japan after the Second World War. However, since 1990, worsening economic situation has increased the number of irregular workers and the gap between working conditions and the long working hours between the workers made it impossible to sustain economic growth, which became the background of labor reform. During the process of submitting the `Labor Reform` bill, the `Labor Reform Realization Conference` was set up to publicize the `Labor Reform Implementation Plan` to solve various labor market problems including `gap` and `long working hours`. In addition, at the Labor Policy Council, it was suggested such as the upper limit of overtime work, the regulation of the same work and the same wage, and the strengthening of the industrial health function following the Labor Reform Implementation Plan. Based on this, in September, 2017, the Japanese government published the "Labor Reform" proposal for submitting the "Labor Reform" bill to the Parliament. The main contents of the labor reform legislation are ① revision of labor hours regulation according to the Labor Standards Act (restriction of overtime work hours, revision of premium wage for over 60 hours of overtime work for SMEs, promotion of annual paid leave, revision of the time (free working hours) system, establishment of the high-level professional system, expansion of the scope of the discretionary work subject to the planning task), ② addition of the provisions of the employer`s responsibility for the working time interval system ③strengthening industrial physicians and occupational health functions in accordance with the amendment of the Labor Safety and Sanitation Act and ④ revising regulations to eliminate the unreasonable treatment gap between regular and irregular workers. Considering the contents of this reform in the future, it is necessary to review desirable working time management and to improve the disparity between regular and irregular workers. It will be the aim of labor reform to improve the conditions of irregular workers and to raise wages.