Masahiro Yamada

Masahiro Yamada (山田昌弘, Yamada Masahiro^?, born November 30, 1957) is a Japanese sociologist known for coining popular sociological terms like "parasite singles" and "gap-widening society"(格差社会, kakusa shakai^?). A graduate of University of Tokyo, he now teaches at Tokyo Gakugei University as professor.