Japan benefitted from a contentious VAR penalty decision on the system's Asian Cup debut as a 1-0 win over Vietnam proved enough to see Hajime Moriyasu's men reach the semi-finals.
Referee Mohammed Abdulla Hassan originally decided there was no case to answer for Bui Tien Dung's challenge on Ritsu Doan in the area, but the decision was overturned following a review at Al Maktoum Stadium.
Doan dusted himself down to convert the penalty, which proved enough to keep Japan on course for a fifth Asian Cup title.
VAR, being used for the first time in the competition from the quarter-finals onwards, had earlier denied Maya Yoshida a first-half goal, but Japan can now prepare for a last-four contest with either China or Iran after winning by a single goal for the fifth time this tournament.