I don't know how, but things like this are commonplace. And now Japan has also managed to score the third goal. And yes, more goals could happen if Indonesia doesn't improve this situation immediately. The most important thing is that they have to restore the enthusiasm they had at the start of the first half.
Now Japan is leading by 4 goals, Indonesia is not playing very badly, but anyway we know how far the two are in the FIFA ranking. Japan's player control ability is superior and we can see it when Japanese players move with the ball. However Japanese players have more experience here, and many have played in Europe, although the same thing is on Indonesia's side, I think the quality of the players is a little different.
Japan certainly in the comfortable situation because they can collect 13 points from 5 matches so most likely Japan will be qualified to the next round and Indonesia situation is very hard because their position currently at the bottom of Group standing and if they want to qualified i think win result is mandatory from Saudi Arabia which this is also very hard for them because based on head to head statistics Indonesia has poor records too from Saudi Arabia