Japanese learners need to learn "written language" for academic writing. "Written language" includes wide-ranging concepts such as genre (e.g. newspaper, academic paper)", rhetoric, and form. Japanese learners especially need to acquire specific vocabulary and expressions for academic papers and to distinguish them from "spoken language" that they have already learned. However, there are few materials and exercises for learning and distinguishing specific vocabulary and expressions for academic papers. This paper defines specific vocabulary and expressions for academic papers as "written language" in a narrow sense and discusses the needs of a "written language syllabus".