Frédéric, Louis; Roth, Käthe (2005). "Daiwa Hausu Kōgyō". Japan encyclopedia. Harvard University Press. p. 145. ISBN0-674-01753-6. Retrieved 2009-10-22.
Brown, Naomi (2003). "Under One Roof: The Evolving Story of Three Generation Housing in Japan". In John W. Traphagan, John Knight (ed.). Demographic change and the family in Japan's aging society. Suny Series in Japan in Transition and Suny Series in Aging and Culture. SUNY Press. p. 61. ISBN0-7914-5649-8. Retrieved 2009-10-23.