Japanese style showers should come with a turkish style squat toilet.
It would be just so much easier, you know? Lots of people already pee in the shower to save water. Just imagine how easy it would be to also be able to shit in the shower and use the shower water to flush and clean the poop toilet.
Of course, one would also have a normal toilet next because they still need a bidet for when they are not taking a shower. #conversation