Hideki Tanaka is Professor of Linguistics at YOKOHAMA National University, Japan. He has obtained a doctoral degree in linguistics from Tsukuba University, Japan. His main research interests lie in contrastive linguistics between English and Japanese. He focuses on the syntactic and semantic aspects on quantitative expressions and relative clauses. He is the author of Eigo to nihongo ni okeru suuryou-hyougen to kankeisetu no kaishaku ni kansuru kijututeki/ rironteki kenkyuu (A descriptive and theoretical study of the interpretation of quantitative expressions and relative clauses in English and Japanese), Kaitakusha, Tokyo, 2015.