in december 1993, when yamaki was 18 years old, she was selected japan national team for 1993 afc championship. at this competition, on december 4, she debuted against chinese taipei. she also played at 1994, 1998 asian games, 1995 and 1997 afc championship. she was a member of japan for 1995, 1999 world cup and 1996 summer olympics. she played 50 games and scored 3 goals for japan until 1999. she was also the captain.