Earlier quoted context omitted.
I don't have the source handy, but I remember there were at least two very attractive features that started the trend of "advanced" toilets in Japan: 1) A seat heater: Bathrooms used to be unheated so without this it would be very cold in the winter. Adding a heated seated was much cheaper than adding a room heater. 2) An artificial sound to overlay embarrassing farting sounds: Without this feature, it was common for…
2) An artificial sound to overlay embarrassing farting sounds: Without this feature, it was common for Japanese women to constantly use the flush in order to create a louder sound. This was obviously a huge waste water. Was this an issue because Japanese walls are thinner? Or homes smaller? Farting isn't considered particularly appetizing here either but I don't remember a single time this has been an issue (or ever…
The Japanese diet also probably plays a role......