The Ford Ranger is a compact pickup truck that was manufactured and marketed by Ford Motor Company from 1983 to 2012 model years for North America;
Over its 29-year production run, Ford sourced the Ranger from three different Ford assembly plants in North America.
The Ranger was produced at the Louisville Assembly Plant in Louisville, Kentucky from 1982 to 1999; from 1993 to 2004, production also was sourced from Edison Assembly in Edison, New Jersey. For its entire production run, the Ranger was produced at Twin Cities Assembly Plant in St. Paul, Minnesota. The final 2012 Ford Ranger produced on December 16, 2011 also ended 86 years of production at Twin Cities Assembly.
From 1997 to 2011, a version was also manufactured and sold in South America, built in Argentina Ford plant.
So no, no association with Izuzu
Mazda was making a smaller pickup since 1961, B-series, Ford started importing these in 1972 as the Ford Courier until 1982, in 1983 Ford started making and selling the Ranger in North America.
Mazda B-series was still made off shore.
Mazda started making the BT-50 in 2006, larger than the B-series/Ranger and just slightly smaller than F-150.
Ford(and Mazda) were building these off shore and it was also referred to as the International Ranger, Ford made it official in 2010 as the Ranger T6.
Since these are essentially an F-150 in all but name I doubt we will see them imported or built in North America.
Still no Izuzu involved
From 1979 to 2010, Mazda had a partnership with the Ford Motor Company, who acquired a 7% stake in 1979 and by 1996, owned 33.3% of Mazda.
This partnership with Ford Motor Company began due to Mazda's financial difficulties during the 1960s.
Starting in 1979 with a 7-percent financial stake, Ford began a partnership with Mazda resulting in various joint projects.
These included large and small efforts in all areas of the automotive landscape — most notably in the realm of pickup trucks (such as the Mazda B-Series, which spawned a Ford Courier variant in North America in 1972.
During the 1980s, Ford gained another 20-percent financial stake.
Ford gradually divested its stake in Mazda(economic collapse of 2008) from 2008 to 2010, with Ford currently holding 2.1% of Mazda stock in 2014.
Izuzu and GM got together in September 1971, by 1972 GM had a 34% stake in Izuzu, the 1972 Chevrolet LUV becomes the first Isuzu-built vehicle to be sold in the United States, the LUV is a small pickup truck