Shunsuke Matsuda is a Japanese linguist and Assistant Professor in the Department of Linguistics at the University of Tokyo. He earned his B.A. and Ph.D. in Linguistics from the University of Tokyo. Specializing in the linguistics of Japanese Sign Language (JSL), his research explores the grammar, structure, and cognitive foundations of sign language as a natural human language. He is known for presenting linguistic concepts in clear, accessible language while highlighting both the unique characteristics of Japanese Sign Language and its similarities to spoken languages. He is also a certified sign language interpreter. His book The Linguistics of the Hand (Te no Gengogaku) introduces the linguistic world of Japanese Sign Language to a general audience.