Question: Which luxury sedan's counerpart is called the Master?

Context articles: Active Stabilizer Suspension System
Acura ILX
BMW New Six
Toyota Crown
Toyopet Master
Mitsuoka Ryoga
Toyota Century
Sports sedan
Limousine
Infiniti J30

Active Power Stabilizer Suspension System (APSSS), also known as Active Power Stabilizer Suspension System, is an electric active suspension system with active anti-roll bars developed by Toyota Motor Corporation for its high-end vehicles including Lexus models.
 By altering stabilizer bar stiffness, this system acts to reduce body tilt during cornering, keeping the vehicle more level during turns and improving handling, as opposed to the natural tendency of a vehicle to roll due to the lateral forces experienced during high-speed maneuvering.
 The active stabilizer system relies on vehicle body sensors and electric motors.
 The first production usage of this system was introduced in August 2005 with the Lexus GS430 sport sedan, followed by the 2008 Lexus LS 600h luxury sedan.
 The development of APSSS is claimed to be the world's first electric active stabilizer system.
 It is a system improvement of an earlier Toyota technology called Toyota TEMS (Toyota Electronic Modulated Suspension).
The Acura ILX is a compact luxury sedan for Honda's luxury brand Acura.
 All ILX variants are based upon the ninth-generation Civic Sedan.
The BMW New Six (E3) is a line of full-size luxury sedans produced by the German automaker BMW from 1968 to 1977.
 All models used the then-new M30 straight-6 engine.
 It marked BMW's return to the full-size luxury sedan market after a hiatus of 5 years, was introduced as a response to growing market segment dominated by Mercedes-Benz.
 It was important in establishing BMW's reputation as a maker of sporting, luxury sedans.
The Toyota Crown (Japanese: トヨタクラウン "Toyota Kuraun") is a line of full-size luxury sedans by Toyota primarily aimed at the Japanese market and sold in other select Asian markets.
The Toyopet Master, introduced in January 1955, is a passenger car that was an update to the SF/RH model with a modernized body.
 As for its predecessor, it has a ladder frame with leaf sprung front and rear axles.
 The Toyopet Master was an evolution of an earlier Toyota sedan called the Toyota SF/RH model (also known as the Super), and was sold in parallel with the first Toyota Crown.
 The more conservative Master was introduced as a frugally equipped version meant for taxi usage.
 The Master and Crown shared the same R-series engine, which produces 48 PS in the Master.
 It was sold at a chain of Toyota Japan dealerships called "Toyota Store", next to the more upscale Crown, which was intended as a private purchase alternative to the Master.
The Mitsuoka Ryoga is an Entry-level luxury sedan manufactured by Mitsuoka.
 There are two versions of it, a wagon and a sedan.
 It has a fuel tank capacity of 60L.
 The price of the Ryoga ranges from 2,461,000 yen to 2,871,750 yen.
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.
A sports sedan or a sports saloon is a sedan automobile (US) or saloon car (UK) that is designed to look and feel "sporty", offering the motorist more connection with the driving experience, while providing the comfort and amenities expected of a luxury sedan.
 A wider definition that includes related coupé, convertibles, crossovers is known as sport luxury.
 Most vehicles in this category overlap with the compact executive car and executive car classifications, while the sporty small family sedans are called sport compacts (mostly used in North America).
A limousine (or limo) is a luxury sedan or saloon car generally driven by a chauffeur and with a partition between the driver and the passenger compartment.
 Limousines often have a lengthened wheelbase.
 Although usually associated with luxury vehicles, the word "Limousine" is also simply a generic term in some countries for a standard sedan bodystyle.
The Infiniti J30, or Nissan Leopard J Ferie ("férié" is French for "holiday") in Japan, was a rear wheel drive luxury car.
 The J30 went into production on April 7, 1992 as a 1993 model to replace the M30 (which was a coupe), and was launched in the United States after its competitor, the Lexus GS.
 The car was designed to slot between the smaller G20 and the larger Q45, as Infiniti's first mid-size sedan to compete directly with the Acura Legend.
 Also, it was fairly small but featured rounded styling uncharacteristic of the crowded executive car class, that is now reminiscent of a four-door coupé.
 Chief designer for the J30 was Jerry Hirshberg, president of Nissan Design International (NDI) and exterior designer Doug Wilson in 1988-1989.
 Design work was frozen in 1989.
 In a promotional video produced in 1994, it was referred to as a "personal luxury sedan" as attempt to define it as a four-door coupé.
 It has the round looks of the Nissan Altima/Bluebird U13.