In August 2002, Maruyama was selected Japan U-20 national team for 2002 U-19 World Championship. In October, she was selected Japan national team for 2002 Asian Games. At this competition, on 2 October, she debuted against North Korea. She played in World Cup 2 times (2003 and 2011) and Summer Olympics 3 times (2004, 2008 and 2012). In the 2011 World Cup in Germany, she scored the only goal of the game, defeating the host country and taking Japan to its first ever semifinals of the tournament. She played as a substitute in the final as Japan defeated the United States. At 2012 Summer Olympics, Japan won the silver medal. She played 79 games and scored 14 goals for Japan until 2014.