Mazda previously used a number of different marques in the Japanese (and occasionally Australian) market, including Autozam, Eunos, and Ẽfini, which have since been phased out. The motivation was brought on by market competition from other Japanese automakers efforts in offering vehicles at multiple Japanese dealership networks offered by Toyota, Nissan, and Honda. Mazda's implementation of brand diversification reflected a Japanese engineering philosophy, called Kansei engineering, which was used as an advertising slogan in North America. This selective marketing experiment was ended in the mid-1990s due to economic conditions, largely attributed to the collapse of the Japanese asset price bubble in 1991.