The only city on Uji, City Korai sits atop the eastern rise of The Mainland, marking the highest sub-region in both altitude and status. As the cultural, economic, and political centre of Korainian life, it houses major institutions including The Ovum.

Known for its opulence, the city is characterised by glass architecture, illuminated club strips, and quartz-powered conveniences. Despite its exclusivity, City Korai sets the tone for fashion, policy, and leisure across the regions, embodying the aspirations of a society shaped by deep stratification and expansion since the First Wave of Confirmation.