In their final match of 2013, the Blue Samurai and Rode Duivels will meet in Brussels, providing that the hosts have secured their World Cup qualification by then
The Blue Samurai were the first side to qualify for World Cup 2014 and are eager to test themselves against the calibre of country that they expect to face next June in Brazil.
Japan coach Alberto Zaccheroni travelled to Europe with his team in 2012, where they played France and Brazil, and is eager to continue that trend by testing the nation against the continent's best international sides.
The Italian's desire for high-profile friendlies on enemy soil is no secret and his team are already scheduled to travel to Serbia and Belarus in October.
The friendly, which has not been announced officially by either country's football association, was reported by local media on Belgium public television program La Tribune. Belgium are currently top of Group A in Europe's World Cup qualifying section.
Japan are undefeated in three matches against the 10th-ranked Fifa side, including a famous 2-2 draw in their 2002 World Cup opener at Saitama Stadium.