Abstract
Open access movement is a hot issue in a recent Library and Information Science. This article analyzed 'the Budapest Open Access Initiative (BOAI),' which triggered the open access movement. First, this article introduced the foundation, 'the Open Society Institute (OSI),' which has proposed and supported BOAI, and its founder, George Soros. We also surveyed their philosophical basis, the concept of 'Open Society' -Karl R. Popper advocated. In addition, we revealed that BOAI was affected by the concept of 'Open Society'. Second, we revealed how people accepted the concept of 'Open Society' by quantitative analysis of literatures about open access. As a result, it was revealed that while OSI participated to the open access movements to achieve the concept of 'Open Society' people in open access movement have not referred to OSI's intention.