In December 1997, when Nakachi was 16 years old, she was selected the Japan national team for 1997 AFC Championship. At this competition, on December 5, she debuted against Guam. She played at 1998, 2002 Asian Games, 2001 and 2003 AFC Championship. She was also a member of Japan for 1999 and 2003 World Cup. She played 30 games for Japan until 2008.