The Mazda Roadpacer AP (Anti Pollution) is a full-size sedan that was sold by Mazda in Japan, it was introduced to compete with sedans, such as which large four-door limousine, produced mainly for the Japanese market?
Mazda Roadpacer AP:  The Roadpacer was introduced to compete with large Japanese flagship sedans Toyota Century, Nissan President, Isuzu Statesman de Ville, and the Mitsubishi Debonair. Toyota Century: The Toyota Century (Japanese: トヨタ・センチュリー) is a large four-door limousine produced mainly for the Japanese market, serving as Toyota's flagship car within Japan; whilst globally the unrelated Lexus LS series is Toyota's flagship luxury model outside Japan.
Toyota Century