Not only does TOTO specialize in small bathrooms in Japan. INAX is another company that also makes small rooms where bathtub and shower can be combined and all floor soaking water. The floor and the mirror both have built-in heating. Such bathrooms are easy to clean and perfect for those who live in houses. It is difficult to install such a room in an apartment so that the product would better suit homeowners. There are more than a number of such bathrooms from INAX. They differ in design, size, arrangement of things, and built-in functions. You can read more about it on the INAX site.