The Center for Common English as a Language (CELF), led by a private university in Tokyo, was established after a serious examination of the educational significance of using English as a common language (ELF). However, such examination has not yet been sufficiently conducted among scholars and practitioners who should be most affected by ELF (Seidlhofer, 2011). Many ELF users have different native languages and rarely interact with native English speakers; rather, they interact with other ELF users. The changes that occur as English is used as a common language are not necessarily abnormal, but can be seen as part of the process of language evolution (Seidlhofer, 2011). This paper examines the impact of this process on education and learning in Japan, reports on ongoing research, and discusses how the ELF perspective will influence current educational practices.