Black Princesses head coach, Yussif Basigi, has attributed his side's defeat to Japan to a lack of concentration in the ongoing FIFA U-20 Women's World Cup.
Ghana suffered a 4-1 defeat against the Asian side in their second Group E game on Thursday night.
"I will attribute this game to a lack of concentration at a point," said Basigi after the game.
"I think we mapped up a very strong strategy against them it worked until the 40th minute then [the players] lost focus in the next few minutes we conceded which was not the best.
"Even in the second half, we were able to read exactly what they were going to apply and then we ask [the players] to stay focused and mark them only for them to lose concentration again and unfortunately they had another two goals."
The defeat to Japan means Ghana has now lost in back-to-back games in the competition after losing to Austria also in their opener.
The Black Princesses will now face New Zealand in their final group game of the competition hoping to finish as one of the best third-placed teams.
Ghana are chasing to qualify from the group phase for the first time despite making six consecutive appearances.