Officials from GoalRef were on hand at Yokohama International Stadium to show off their technology, which uses magnetic fields to detect whether the ball has fully entered the net. Once a goal has been scored, referees are notified via a specially-built wristwatch that vibrates and displays the word 'GOAL'.
The company's technology will be used for all matches at the stadium that hosted the 2002 World Cup final, including the championship match on December 16. Hawk-Eye, a separate system that relies on high-speed cameras, will be used at Toyota Stadium, site of the quarter-finals and the first semi-final.
The use of GLTs has been heavily debated over the years, but Fifa president Sepp Blatter began to push for adoption in earnest following controversy over Frank Lampard's infamous 'ghost goal' during the 2010 World Cup match between England and Germany.
The testing process, which has cost over $1 million, began in 2011 and concluded with Fifa signing licenses with GoalRef and Hawk-Eye in October of this year. If proven successful, GLT is expected to be utilised in next year's Confederations Cup as well as the 2014 World Cup.