Toto is a US company HQ in Georgia) although they do have factories in other countries, the quality control is ultra high. I know of no other brand that is made in the US. American Standard, Eljer,and others are made in Mexico; Kohler is Chinese. Toto is the largest toilet manufacturer in the world and their toilets from the lowest priced to the highest all preform extremely well. Toto's flush valves and flappers are standard and available in most hardware and plumbing stores.