Question: The Mitsubishi 4A9 engine was introduced by a company headquartered in what country?

Context paragraphs:
Mitsubishi 4N1 engine: The Mitsubishi 4N1 engine is a family of all-alloy four-cylinder diesel engines developed by Mitsubishi Motors, produced at the company's powertrain facility in Kyoto, Japan for use in Mitsubishi's small to mid-sized global passenger cars.

Mitsubishi 4A3 engine: The Mitsubishi 4A3 engine is a range of alloy-headed inline four-cylinder engines from Mitsubishi Motors, introduced in 1993 in the sixth generation of their Mitsubishi Minica "kei car".

Mitsubishi 4B1 engine: The Mitsubishi 4B1 engine is a range of all-alloy straight-4 engines built at Mitsubishi's Japanese "World Engine" powertrain plant in Shiga on the basis of the Global Engine Manufacturing Alliance (GEMA).  Although the basic designs of the various engines are the same, their exact specifications are individually tailored for each partner (Chrysler, Mitsubishi, and Hyundai).  The cylinder block and other basic structural parts of the engine were jointly developed by the GEMA companies, but the intake and exhaust manifolds, the cylinder head’s intake and exhaust ports, and other elements related to engine tuning were independently developed by Mitsubishi.

Mitsubishi MCA: Mitsubishi MCA stands for Mitsubishi Clean Air, a moniker used in Japan to identify vehicles built with emission control technology.  The term was first introduced in Japan, with later introductions internationally.  The technology first appeared in January 1973 on the Mitsubishi 4G32A gasoline-powered inline four cylinder engine installed in all Mitsubishi vehicles using the 4G32 engine, and the Saturn-6 6G34 six-cylinder gasoline-powered engine installed in the Mitsubishi Debonair.  The technology was installed so that their vehicles would be in compliance with Japanese Government emission regulations passed in 1968.

Mitsubishi 3A9 engine: The Mitsubishi 3A9 engine is a range of all-alloy three cylinder engines from Mitsubishi Motors that were jointly developed with 4A9 engine family.  They were introduced in the 2003 version of their Mitsubishi Colt supermini, and built by DaimlerChrysler-owned MDC Power in Germany (previously a joint venture).

Mitsubishi 4A9 engine: The Mitsubishi 4A9 engine is the newest family range of all-alloy inline four-cylinder engines from Mitsubishi Motors, introduced in the 2004 version of their Mitsubishi Colt supermini, and built by DaimlerChrysler-owned MDC Power in Germany (previously a joint venture).

Mitsubishi 4G9 engine: The Mitsubishi 4G9 engine is a series of straight-4 automobile engines produced by Mitsubishi Motors.  All are 16-valve, and use both single- and double- overhead camshaft heads.  Some feature "MIVEC" variable valve timing, and it was the first modern gasoline direct injection engine upon its introduction in August 1996.

Mitsubishi 4M4 engine: The Mitsubishi 4M4 engine is a range of four-cylinder diesel engines from Mitsubishi Motors, first introduced in the second generation of their Montero/Pajero/Shogun SUVs.  They superseded the previous "4D5" engine family, although they did not replace them.

Hyundai G4JP engine: The Hyundai G4JP engine is a Mitsubishi 4G63 variant manufactured by Hyundai Motor Company, 2.0L (1997 cc) DOHC 16v (100 kW(136 bhp)) engine, it was only available on foreign markets and it is used for cars like:

Mitsubishi Motors: Mitsubishi Motors Corporation (Japanese: 三菱自動車工業株式会社 , Hepburn: Mitsubishi Jidōsha Kōgyō KK ) is a Japanese multinational automotive manufacturer headquartered in Minato, Tokyo, Japan.  In 2011, Mitsubishi Motors was the sixth biggest Japanese automaker and the sixteenth biggest worldwide by production.  From October 2016 onwards, Mitsubishi is one-third (34%) owned by Nissan, and thus a part of the Renault–Nissan–Mitsubishi Alliance.

Supporting paragraphs: Mitsubishi 4A9 engine Mitsubishi Motors
Answer: Japan