Question: 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?

Context paragraphs:
Mazda Grand Familia: The Mazda Grand Familia is an automobile which was produced by Mazda in Japan from 1971 to 1978.  It was sold as the Mazda 808 in some export markets including Asia, Australia, and New Zealand, and as the Mazda 818 in many others.  The body style configurations offered were a two-door coupé, a four-door sedan, and a five-door station wagon.  The Grand Familia offered only inline four cylinder engines.  The largely identical rotary-powered versions were marketed as the Mazda Savanna in Japan, with export markets taking this model as the Mazda RX-3.

Mazda Sentia: The Mazda Sentia is a large rear wheel drive luxury car that was sold by Mazda in Japan from 1991 to 1999 over two generations.  It replaced the Mazda Luce nameplate on the Mazda H platform, and continued the tradition of being Mazda's largest flagship sedan, which had been in production since the late 1960s.  The name "sentia" is derived from the Latin word ""sentir"", meaning to sense, feel or hear.

Nissan President: The Nissan President (Japanese: 日産・プレジデント "Nissan Purejidento") was a Japanese luxury limousine produced by Nissan from 1965 to 2010.  The car was mainly used by corporate executives and government officials.  It was a luxury sedan specifically aimed to the Japanese market, where its main competitor was the Toyota Century.  The President was the flagship limousine, and was sold at Nissan Motor Store dealerships.  During the 1970s, it briefly saw other Japanese competitors introduce large sedans called the Isuzu Statesman de Ville and the Mazda Roadpacer (derived from General Motors-Australia products) which were short-lived.

Mazda Roadpacer AP: The Mazda Roadpacer AP (Anti Pollution) is a full-size sedan that was sold by Mazda in Japan between 1975 and 1977, although the last car was not sold until 1979.  It was based on the Australian Holden HJ and HX series Premier.  Premiers were shipped to Japan without engines, and Mazda fitted a 1.3-liter "13B" Wankel engine into the bay.  Although the engine produced 100 kW and 138 Nm of torque, the Roadpacer performed rather poorly as it weighed 1575 kg .  The Roadpacer was introduced to compete with large Japanese flagship sedans Toyota Century, Nissan President, Isuzu Statesman de Ville, and the Mitsubishi Debonair.

Ɛ̃fini: ɛ̃fini (アンフィニ ) was a luxury vehicle division of Japanese automaker Mazda that operated between 1991 and 1997 in Japan only.  Its inception as a brand emerged in the late 1980s when Mazda diversified its sales channels in the Japanese market with the launch of three new marques.  The company created Autozam, Eunos, and ɛ̃fini , in addition to the Mazda and Ford brands already marketed there.  This selective marketing experiment ended in the mid-1990s due to economic conditions, largely attributed to the collapse of the Japanese asset price bubble in 1991.  As a brand, ɛ̃fini encompassed most, if not all dealers formerly under Mazda's "Auto" dealer chain.  It's pronounced like the French word "infini".  The name is actually written with a tilde over the initial lower case Greek "ε" (as in "ɛ̃"), and can therefore be assumed to be IPA, the pronunciation symbols universally taught in Japan, and quite often used in product naming.

Toyota Carina ED: The Toyota Carina ED was a Japanese compact car created in 1985 as a companion to the 1984 Carina sedan.  It was positioned as the four-door Celica, with a similar focus on luxury found on larger Toyota hardtop sedans, like the Toyota Crown and the Toyota Cresta.  It was the counterpart of the Corona EXiV.  Its design sought to emulate the hardtop four-door coupé styling of large American and European sedans, resulting in a small, low cabin with longer front and rear ends.  The ED's B-pillar stood up in the middle with no purpose other than to hinge the rear door on; it was not attached to the roof side of the cabin.  The ED achieved huge sales in Japan, and other Japanese manufacturers introduced the Mazda Persona, Nissan Presea, and Mitsubishi Emeraude around the same time.  "ED" is the initials of "Exciting" and "Dressy".  When the Carina ED was discontinued, the Toyota Brevis appeared for the market segment served by the Carina ED.

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.  Production of the Century began in 1967 and the model received only minor changes until a redesign in 1997.  The Century derived its name from the 100th birthday of Sakichi Toyoda, the founder of Toyota Industries.  The Century was available with only a V8 engine, the third Japanese built sedan post-war, at its introduction in 1967 until a major redesign in 1997, and is now only available with a Toyota built V12, an engine unique to the Century.  Although the Century is a premium, full size luxury sedan, it is not available at Japanese Lexus dealerships; it can only be purchased at specifically identified "Toyota Store" locations.  The logo used throughout is called the "Hō-ō 鳳凰" or "Fushichō" from Asian mythology, representing the Imperial House of Japan.

Hongqi HQE: The Hongqi HQE (紅旗HQE) is a large four-door limousine built by FAW Hongqi.  Released in 2009, it is the first Chinese-built V12 cylinder engine-equipped luxury car.  As Hongqi's most advanced top-of-the-line vehicle type, the HQE will serve as the high-end vehicle for VIPs and high-ranking national officials.  The HQE was designated the presidential vehicle for paramount leader Hu Jintao's troop review for the People's Republic of China National Day 60th anniversary celebration.  The production model of the HQE is called L7 (short wheel base) and L9 when the mass production began in 2013.

Mazda Persona: The Mazda Persona is a mid-sized, front-wheel drive, four-door hardtop sedan produced by Mazda in Japan from November 1988 to 1992, and sold both within its main range and under its upscale Eunos brand, as the Eunos 300.  It used Mazda's MA platform and was replaced by the ɛ̃fini MS-8 in March 1993.

Chrysler Concorde: The Chrysler Concorde is a large four-door, full-size, front wheel drive sedan that was produced by Chrysler from 1992 to 2004.  It assumed the C-body Chrysler New Yorker's position as the entry-level full-size sedan in Chrysler's lineup.  One of Chrysler's three original Chrysler LH platform models derived from the American Motors/Renault-designed Eagle Premier, it used revolutionary cab forward design.  The Concorde was related to the Dodge Intrepid, Eagle Vision, Chrysler 300M, Chrysler LHS, and the eleventh and final generation Chrysler New Yorker.  It was on "Car and Driver" magazine's Ten Best list for 1993 and 1994.

Supporting paragraphs: Mazda Roadpacer AP Toyota Century
Answer: Toyota Century