The final game for the team will be against the hosts France who are set to take on Norway in a top liner later today.
Nigeria now have three points, following their 3-0 loss to Norway in the first game.
There was, though, a lengthy review by the Video Assistant Referee to check on what looked a close handball call against the Nigeria captain as the ball flew past her on the way towards the empty net.
The Koreans who were also pummeled 4-0 in their opening game against France tried hard to pull level but they were denied.
And with 15 minutes left, a fine individual effort from Barcelona's Asisat Oshoala settled matters after she raced onto a pass down the right and into the penalty area ahead of her marker.
Korea were pulled back for offside when they found the net in the 58th minute before a Nigeran counter attack saw Oshoala, a three-time African women's Footballer of the Year, ran half the length of the field, brushed past a defender, rounded the goalkeeper and squeezed the ball home from an nearly improbable angle.