Samuel E. Martin was a master teacher of the Japanese language and a major force in language learning in the postwar U.S. He received his undergraduate and master's degrees in Oriental languages from the University of California at Berkeley and his Ph.D. in linguistics from Yale University. At Yale he served as chairman of the Department of East and South Asian Languages and Literatures and the Department of Linguistics. He is the author of numerous books and papers on Japanese and Korean, including the definitive A Reference Grammar of Japanese and A Reference Grammar of Korean.
Eriko Sato is lecturer of Japanese and Japanese linguistics and the director of the Pre-College Japanese Program and the Teacher Certification Program for Japanese at the State University of New York at Stony Brook, where she received her Ph.D. in Linguistics in 1996. She authored Japanese for Dummies (Wiley, 2002), Japanese Demystified (McGraw Hill, 2008), and Contemporary Japanese: A Textbook for College Students (Tuttle, 2005), and co-authored My First Japanese Kanji Book (Tuttle, 2009) and Essential Japanese Grammar (Tuttle, 2012).