In 2000, Morishima played at 2000 Asian Cup. he played 5 matches and Japan won the champions. In 2001, he played at 2001 Confederations Cup. He played in all 5 matches and Japan won the 2nd place. At the 2002 World Cup he got three games as a substitute, scoring after two minutes in the game against Tunisia. He played 64 games and scored 12 goals for Japan until 2002.