In 2007, Morishige was selected the Japan U-20 national team for 2007 U-20 World Cup and played 3 matches as midfielder. In 2008, also played at 2008 Summer Olympics. At this tournament, he played 3 matches as defender. In July 2013, he was selected the Japan national team for 2013 East Asian Cup. At this tournament, he debuted against China on July 21. After the debut, he played many matches as center back with Maya Yoshida. He played at 2014 World Cup and 2015 Asian Cup. He played 41 games and scored 2 goals for Japan until 2017.