Toyota Mark X late 1960s. Instead of being based on a modified Supra chassis "A" series platform, the Mark X continues to use the Toyota "X" platform, and does not share its platform with the Toyota "S" series platform used under the Toyota Crown and the Lexus GS. The continuation of describing this vehicle as the "X" series is a reference to the first dedicated Mark II platform introduced in 1972. Major changes to the Mark series are the engine and footwork. Toyota discontinued the straight-six engines used in the Toyota Verossa, which included the JZ series and the G series engines, and
Toyota Mark II the Toyota Mark X which is still very popular in Japan and select international markets. The Corona Mark II, first offered for sale in Japan, September 1968, at "Toyopet Store" dealerships, was intended as an largest alternative model to the more established luxury sedan, the Crown, sold at "Toyota Store" dealerships, and the smaller Corona, also available at "Toyopet Stores". It was a slightly larger vehicle than the Corona with a higher level of equipment offered at the time, sharing some of the features of the larger Crown, but taking the top position at "Toyopet Store" locations. At its introduction,