The pre-tournament favourite surprisingly lost to Iraq in its second Group D match last week to leave hopes of winning a record-extending fifth Asian Cup title in jeopardy.

But any concerns over facing an early exit were swept away at Al Thumama Stadium after two goals from Ayase Ueda put the four-time champion on course for victory.

Justin Hubner scored a late own goal and Sandy Walsh pulled one back for Indonesia in stoppage-time.

It took Ueda just six minutes to settle any nerves Japan's players and fans might have been feeling going into its final group game.

The Feyenoord striker had won the spot kick after being fouled by Jordi Amat and fired his shot into the corner beyond Indonesia goalkeeper Ernando Ari Sutaryadi to open the scoring.

He doubled Japan's lead in the 52nd minute and when Hubner diverted another effort from Ueda into his own goal in the 88th the win looked beyond doubt.

Walsh scored a consolation in added time and Indonesia, on three points, will have to wait to see if it advances as one of the best third-placed teams.

While Japan safely secured its progress, it was Iraq that advanced as the group winner after substitute Aymen Hussein scored from the penalty spot in the 12th minute of stoppage-time to beat 10-man Vietnam 3-2 in a thrilling clash.

Having already missed one penalty after coming on as a half-time substitute at Jassim Bin Hamad Stadium, Hussein converted from the spot deep into stoppage-time to maintain Iraq’s perfect record in Group D.

Hussein is the tournament's leading scorer with five goals and that record might have been even better had he not struck the post with his earlier penalty against Vietnam.

He still managed to have a key impact on the match with two goals as the 2007 champion came from behind to make it three wins out of three.

Vietnam had taken the lead through Bui Hoang Viet Anh in the 42nd minute, but Khuat Van Khang was sent off in first-half stoppage-time for a second yellow card.

It took only two minutes of the second half for Rebin Solaka to even the score for Iraq and Hussein headed his team in front 17 minutes from time.

Hussein failed to score from the spot when firing against the post and that miss looked to be costly when substitute Nguyen Quang Hai levelled the game in the 91st minute.

That was until Hussein was given the chance to make amends for his earlier penalty, and he made no mistake from the spot on this occasion.