The Toyota N platform is an automobile platform for executive cars (E-class models) from Toyota. It is often called "Mark II platform" and "Crown platform", after its main uses, and, less frequently, "Lexus GS platform".The platform emerged from Mark II (X platform). It debuted in October 1991 with Crown Majesta and Aristo S140, which, in contrast with contemporary S140 Crown, featured monocoque construction instead of Crown's ladder frame.