Agreed, Santoryo. They are generally doing better than last year, so I hope they do well.
Do you think they would play even better if they switched their forward line so that Honda was the central forward with Kagawa playing as central AM behind him and in front of the midfield? Then have 2 wide strikers attacking from the sides.
You mention two things here, Honda as central forward and Kagawa as CAM.
Honda as central forward is not a possibility with the current team. He actually was used in this role in the previous World Cup in South Africa. Going in to the previous WC, Japan was really struggling. Last test match before the WC was a 0-2 loss against none other than Ivory Coast. Japan was not able to hold the ball at all up front.
So from the first game in the WC, they tried something they've never done before: using Honda at the forward position and having a three man defensive midfield. This was an emergency change. The defensive style was a realistic choice with the at the time, but it wasn't a particularly attractive style of play.
With the current team the forward options are Osako, Kakitani, Okubo, or perhaps even Okazaki. Personally Osako is my favorite to play this position. (Osako played for a Bundesliga division 2 team 1860 Munich the past season. His transfer to division 1 team 1.FC Koln was just announced.)
Kagawa as CAM has been tried a few times, but whenever Honda is available Zacc has preferred to use Honda in this role. He is generally considered better at holding on to the ball when defenders charge you from behind in the crowded center area. Kagawa as CAM in the NT may work but Zacc hasn't tried it enough for the team-combination to be mature. Kagawa does tend to drift in and roam around relatively freely anyway, and the current style of interchange of positions seems to be working so far.
Having said all this, a big concern for Japan at the moment is Honda's shape. He might become a liability if his conditions do not improve. We'll see how he does in the last test match against Zambia.