Ellen White proved the difference once again for Great Britain as they booked their place in the quarter-finals of the women's Olympic football tournament.
The Manchester City forward was on target twice in their opener against Chile and it was her prodigious leap that left hosts Japan sweating on their knockout place.
With two wins from two, it's job done for Hege Riise's team for now as they prepare to round off their group stage against Canada on Tuesday.
Ellen White runs away in celebration after her header put Great Britain ahead against Japan
The match was settled in the 74th-minute as Manchester City forward White headed home
White ran to the near post to leap ahead of the Japanese goalkeeper and a defender to score
It was a winning goal of simplicity, coming 16 minutes from the end, that owed everything to White's sheer determination to get her head on the ball.