This washlet-integrated toilet with all-round curves accentuates the beauty of ceramics. Using technology honed over a century to enclose all functional parts in ceramics, the designers have created a toilet for 360-degree beauty, open or closed. A gapless one-piece seat offers the ultimate in seating comfort and cleanliness based on Kansei engineering and physiology. A well-designed lid shape and tornado cleaning keep the toilet clean even after extended use. The top-line model is coated with an Actilight photocatalyst layer activated by UV light when the lid is closed to break down germs, attract water and repel dirt.