Shuji Kajiyama/Associated Press
Greece paid a heavy price for lapses in concentration against Colombia. If they are not at their sharpest, they risk a similar fate against Japan.
In Keisuke Honda and Shinji Kagawa, operating behind the striker and off the left-hand flank respectively, Japan have a duo of attacking midfielders who certainly have the capability to cause Greece problems.
FSV Mainz 05 forward Shinji Okazaki played off the right against the Ivorians, with Yuya Osako at No. 9, and they both have the ability to take advantage of any space created through over-attention on Kagawa and Honda.
The centre-back pairing of Kostas Manolas and Sokratis Papastathopoulos is probably Greece’s best asset, but they will have their work cut out against an attacking line-up which combines fluid passing and movement with a high level of technical ability.
Whilst Kagawa has flattered to deceive at Manchester United, his ability is not in question, and he is more than capable of both creating and taking chances.
Honda's goal against Cote d’Ivoire showed how dangerous he can be if given space in the box.
Manolas and Papastathopoulos will have a stern positional challenge to face, and they will need support from their full-back colleagues. As Kagawa drifts in from the left and exchanges passes with Honda and Osako, the Greek defence will have to be fully switched on in order to cope.
On paper it looks like a tough day for the Piratiko, but they have surprised the world before, and they will look to do so again.