On 4 June 1985, Morishita debuted for Japan national team against Malaysia. He also played at 1986 World Cup qualification in 1985. From 1986, he played as regular goalkeeper at 1986 Asian Games and 1988 Summer Olympics qualification in 1987. From 1988, although he deprived of regular goalkeeper by Shigetatsu Matsunaga, he played all matches included Asian Games in 1990. He played 28 games for Japan until 1991.