Question: In what country was the car made which won the 2009 Speed World challenge in the Touring Car championship?

Context paragraphs:
2008 Speed World Challenge: The 2008 Speed World Challenge season was the nineteenth Speed World Challenge season.  It began March 14, 2008, and finished on October 4, 2008, after 13 rounds.  The defending champions were Jeff Altenburg in Touring Car and Randy Pobst in Grand Touring competition.

Colin Turkington: Colin Henry Turkington (born 21 March 1982) is a Northern Irish auto racing driver, who is currently competing in the British Touring Car Championship for Team BMW WSR in a BMW 125i M Sport .  His most notable successes to date include becoming 2009 British Touring Car Champion driving for Team RAC and 2014 British Touring Car Champion driving for eBay Motors.  He has also competed in the World Touring Car Championship and the inaugural Scandinavian Touring Car Championship.  In 2013 he returned to the British Touring Car Championship with his current team, West Surrey Racing.

2005 Speed World Challenge: The 2005 Speed World Challenge season was the sixteenth season of the Sports Car Club of America's World Challenge series.  The series' title sponsor was television network Speed Channel, who broadcast all the races.  Championships were awarded for grand touring and touring cars.  The season began on March 18 and ran for eleven rounds.  Andy Pilgrim and Cadillac won the championships in GT, and Peter Cunningham and Acura won in Touring Car.

2004 Speed World Challenge: The 2004 Speed World Challenge season was the fifteenth season of the Sports Car Club of America's World Challenge series.  The series' title sponsor was television network Speed Channel, who broadcast all the races.  Championships were awarded for grand touring and touring cars.  The season began on March 19 and ran for ten rounds.  Tommy Archer and Audi won the championships in GT, and Bill Auberlen and BMW won in Touring Car.  The season marked the first wins for the Cadillac brand, a step up for General Motors after three of its brands declined in the nineties.

Acura TSX: The Acura TSX is a medium-sized entry-level luxury car that was manufactured by Acura.  Introduced in April 2003 as a 2004 model, it was sold only in the United States and Canada, but since the 2009 model year it has also been available in Mexico.  It is also sold in Guam and Puerto Rico.  It is sold in North America under the Acura luxury marque, where it filled the gap as Acura's 4-door, entry-level sedan when the Integra sedan was discontinued in 2001 (1996 in Canada since the EL was the Integra sedan's replacement there).  The TSX would also eventually replace the Acura RSX in the US (which in turn succeeded the Acura Integra coupe).  From 2008 until 2013, the TSX was the smallest vehicle in the Acura model line, other than the Civic-based CSX (and the preceding 1.6/1.7EL) sold only in Canada.  In 2013, the smaller ILX was introduced in both the United States and Canada, based upon the Civic platform (replacing the CSX in Canada).  All TSXs were built in Sayama, Saitama, Japan.

2009 Speed World Challenge: The 2009 SCCA Speed World Challenge was the twentieth Speed World Challenge season.  began March 18, 2009, and was completed on October 11, after 10 rounds.  The Grand Touring championship was won by Brandon Davis driving a Ford Mustang GT, and the Touring Car championship was won by Pierre Kleinubing driving an Acura TSX.  It was the last season under the Speed Channel sponsorship.

2010 Swedish Touring Car Championship: The 2010 Swedish Touring Car Championship season will be the 15th and last Swedish Touring Car Championship (STCC) season.  Four of the race weekends will be held together with the Danish Touring Car Championship and the results from these races will also count towards the Scandinavian Touring Car Cup.  From 2011, the new Scandinavian Touring Car Championship will replace both the Swedish and the Danish Touring Car Championships.

Lawson Aschenbach: Lawson Aschenbach is an American professional racing driver.  He is a four-time Pirelli World Challenge champion, and most recently, the 2014 Pirelli World Challenge GTS Champion.  He is the 2006 SPEED World Challenge (later Pirelli World Challenge) Rookie of the Year and became the first person to win the SPEED GT Championship in his rookie season.  He is also the champion of the 2010 Grand-Am Continental Tire Sports Car Challenge (later IMSA Continental Tire Sports Car Challenge) ST Championship and 2014 Lamborghini Super Trofeo ProAM World Champion.

2003 Speed World Challenge: The 2003 Speed World Challenge season was the fourteenth season of the Sports Car Club of America's World Challenge series.  The series' title sponsor was television network Speed Channel, who televised all the races.  Championships were awarded for grand touring and touring cars.  It began on March 14 and ran for ten rounds.  Randy Pobst and Audi won the championships in GT, and Bill Auberlen and BMW won in Touring Car.  The series would head to Puerto Rico for 2003, their first race outside of North America (i.e. the United States and Canada) since 1991 when they went to Mexico.

1994 SCCA Pro Racing World Challenge: The 1994 SCCA Pro Racing World Challenge season was the fifth running of the Sports Car Club of America's World Challenge series.  To this date the 1994 season is the most recent in which an American manufacturer (Oldsmobile) won the touring car championship.  The groups were changed from A, B, and C to World Challenge, Touring Car, and Super Production, reviving the class names not seen since 1991.

Supporting paragraphs: 2009 Speed World Challenge Acura TSX
Answer: Japan