Onna no Kotoba, Otoko no Kotoba [Female Language and Male Language]Tokyo: Nihon Keizai Tsushin-sha
1981
Nihongo no Danjosa [Sex Difference in the Japanese Language](with F. C. Peng and Motoko Hori) Tokyo: Tozai Shuwa Gakkai
1986
Nihonjin to Amerikajin no Keigo Koodoo [The Linguistic Politeness of Japanese and Americans](with Tsunao Ogino, Akiko Kawasaki, and Shoko Ikuta). Tokyo: Nan'un-do
