The joint festival between the two neighboring countries first began in 2005 with the mission to exchange culture between Korea and Japan. This year, the event will take place on an outdoor stage on October 2nd in Tokyo. "We're very happy to be invited to an event with positive benefits for both Korea and Japan," revealed a representative for Girl's Day. "Because it's a very important event, we will make sure to showcase our best." Stay tuned to allkpop for more info on this upcoming event!