This paper follows the quantitative changes in teaching programs before and after re-accreditation, and explores the reasons for the differences among universities. In previous studies, it has been feared that universities’ intentions are passively determined by policy, and that autonomy and independence are controlled. However, it was inferred that the establishment of teaching programs is influenced by the decisions of the university as a management entity. In order to examine this question, we calculated the number of courses that had been reduced before and after re-accreditation, to clarify the macroscopic reality, and then conducted a statistical analysis of the actual situation of universities that had reduced the number of courses. The results showed that the number of courses decreased before and after re-accreditation. However, when the types of courses that decreased were checked individually, it was found that the determining factor for the decrease was analysis of demand for employment. In addition, statistical analysis of the management indicators and university characteristics of the universities that reduced the number of programs revealed that some universities were forced to exit after re-accreditation, while others actively tried to participate. In other words, the risk to the significance of the open system due to the re-accreditation system is not a quantitative decrease in the number of programs, but rather a qualitative problem brought about by the shrinkage of the attributes of training programs.