In the late 1980s and early 1990s, Japanese automakers broadened their lineups with luxury divisions, to supplement their entry- and middle-class focused fare. Acura in 1986; Lexus in 1989; and Infiniti in 1990. Mazda also had a plan for a new luxury  marque to be called Amati. What debuted as the 1995 Mazda Millenia was…