Each team gets five penalty kicks.
Paraguay went first
PK 1-Paraguay scores, Japan scores
PK 2-Paraguay scores, Japan scores
PK 3-Paraguay scores, Japan misses (score is now 3-2)
PK 4-Paraguay scores, Japan scores (score is now 4-3)
PK 5-Paraguay scores, no need for Japan to take their turn since the score is now 5-3 with no chance for Japan to catch up.
When it was 4-3, after kick 4, they continued to the final PK because if Paraguay missed that one, Japan would take their turn and if they made it the two teams would be tied 4-4...
then it goes to a second round of PKs. However, Paraguay made their fifth kick so no need for Japan to take their fifth kick.