There was a considerable increase in the number of dwellings in Japan with flush toilets from 45.9% in 1978 to 83.0% in 1998. This likely led to an increased acceptance of the new style of toilets because the North American & Western European style flush-toilets were not as prevalent in the home at the time and so an in-grained cultural use was not the determining factor for choosing new toilet styles.

* Stats from Statistics Bureau, Japan.