Japanese: The Spoken Language (JSL) is an introductory textbook series for learning Japanese. JSL was written by Eleanor Harz Jorden in collaboration with Mari Noda. Part 1 was published in 1987 by Yale Language Press, Part 2 in 1988, and Part 3 in 1990. The series differs from most Japanese language textbooks in many ways, most basically in that it focuses exclusively on the spoken language and leaves discussion of any aspect of the written language to other textbooks, such as the parallel series Japanese: The Written Language.