Holders Nadeshiko Japan secured top spot in Group C with a 1-0 win over Ecuador at the Women's World Cup in Canada on Tuesday.
Already guaranteed a place in the round of 16, Japan needed only a draw in its final game to go through as group winners, but Yuki Ogimi's early strike ensured Norio Sasaki's side made it three wins from three.
"There are little things we can improve on but we have accumulated points and the players have done well to get us through in first place," said Sasaki.