Masatoshi Koizumi is a Professor of Linguistics and Brain Science at Tohoku University, Japan. He received his B.A. from the International Christian University, M.A. from Ohio State University, and Ph.D. from Massachusetts Institute of Technology. His research interests are in grammatical theory and neuro-cognition of language. He is the author of Phrase Structure in Minimalist Syntax, Bun-no Kozō [Clausal Architecture], and numerous journal articles in Language, Linguistic Inquiry, Frontiers in Psychology, Journal of Cognitive Neuroscience, and so on. He is currently working on a field-based cognitive neuroscientific study of the sentence and discourse processing of OS languages, such Truku Seediq.