Abstract
In general, the importance of Kaizen activities is recognized in many companies, but there are various impediments against its continuity. This paper extracts the relationship between seven factor groups for sustaining KAIZEN activities based on two cause-effect relationships built through two case study literatures. The paper also clarifies transitions of the extent of activation of each company's Kaizen activities, and then illustrates and analyzes the relationship of extent of activation. Through examining the illustrated relationship, the paper proposes desirable relationship between seven factor groups based on the extent of activation of Kaizen activities.