This was after they defeated hosts Cape Verde 2-1 for a 7-1 aggregate win in the final round of the qualification series.
Nigeria will begin their campaign at the tournament against Niger Republic at the Baba Yara Stadium on Sunday, May 21.
The Falconets qualified by setting a World Cup group stage perfect record for themselves after beating Canada 3-1 in Alajuela.
The Falconets dominated possession with 64 per cent compared with the South Koreans’ 36 per cent.
The Falconets achieved a comfortable 4-1 win over their Senegalese counterpart, after winning the first leg tie 3-1 away.
The Falconets are the most successful women’s U-20 team in Africa.
