The Millenia was conceived as the entry model in Mazda's stillborn "Amati" luxury nameplate.  "Amati" was meant to be Mazda's answer to Nissan's Infiniti, Toyota's Lexus, and Honda's Acura brands.  Reportedly in the works was also a V-12 flagship model.  Unfortunately, because of financial concerns, the plans for "Amati" were never fully realized.  However, the Millenia was near completion, so Mazda decided to market the car in the States as a Mazda.  Because of it's world class roots, the quality of the Millenia matches or exceeds those of its competitors, with stringent standards that allow only up to 3mm gaps between the body panels.  The Millenia was manufactured in Mazda's newest, most advanced automobile factory in Hofu City, Japan  This factory was designed and built  for the careful attention to detail needed to assemble luxury automobiles.

In Japan and Australia, the car is known as the Eunos 800.  In Europe - the Xedos 9.  The Eunos 800 had some cool options that we will never see.  Four-Wheel steering, infrared security system, and the solar panel roof are just a few examples that I am aware of.  The later models even have a GPS navigation system.  However, even with all these exceptional features, the most revolutionary innovation was Mazda's accomplishment in producing the Miller-Cycle engine for high-speed automotive use.