The Greater Tokyo Area is the most populous metropolitan area in the world, consisting of the Kantō region of Japan as well as the prefecture of Yamanashi. In Japanese, it is referred to by various terms, the most common of which being National Capital Region (首都圏, Shuto-ken).A 2014 UN estimate puts the population at 37,883,000, making it by far the world's most populous metropolitan area, with more people than the countries of Canada or Iraq.