This study examines the differentiation of minimum wage among the issues concerning the discussion on the improvement of the minimum wage due to the recent increase in the minimum wage. In particular, in relation to the application of the minimum wage difference by Industry and region, the purpose of this paper is to compare and examine the historical development of the japan’s minimum wage system by Industry and region. As a result of this review, it can be understood as the claim of introducing the minimum wage by industry, region, and age, which is currently discussed in Korea, essentialy intends to lower the minimum wage. Therefore, we can not but doubt its authenticity in light of its role as a ‘general minimum wage’ as a safety net protecting all workers required by the minimum wage syatem from unfairly low wages. In addition, Japan’s current minimum wage system, which is frequently introduced as a basis for introducing differentiation, has many differences compared to korea’s minimum wage system in terms of purpose, minimum wage determination standard, It should not be used as.