The Backstreet Boys' Unbreakable Tour was a 2008–2009 concert tour. This was their seventh concert tour in support of their sixth studio album Unbreakable (2007) and this was the first Backstreet Boys tour as a quartet without Kevin Richardson who left the group on June 23, 2006. He did, however, join his band again at the end of the tour in Los Angeles. Richardson later permanently returned to the group on April 29, 2012. The tour kicked off in Japan with two sold out concerts in the Tokyo Dome.

The Backstreet Boys are an American vocal group consisting of Nick Carter, Howie Dorough, AJ McLean, and cousins Brian Littrell and Kevin Richardson. They were formed in 1993 in Orlando, Florida.