Japanese interiors are always about harmony. This harmony can be achieved with right colors and themed patterns. In this case two basic colors were used. Ceramic tiles on the walls are beige while the floor and furniture are dark brown. White sanity ware and stainless steel water fixtures blend with surroundings very well.
There are many interesting solutions in this bathroom. For example a drywall structure hides all these ugly pipes and forms shelves for bathroom accessories. A stepped wall of glass blocks separates the space on different zones. Sakura flowers decorate the bathroom and make it romantic and beautiful.