Kenyo Fuan was not named to Japan's squad for the World Cup in March, suggesting he will not be able to play for Arsenal this month.
Japan will have several key World Cup matches to play this month, notably their opening game against Australia.
If they win, they will ensure they are ranked above Australia and thus lead to the World Cup.
If they lose, The Japanese will need to count on Australia to get a straight-through opportunity in the final round of the crotch pull, or to play in this summer's play-offs.
Therefore, the Japanese team will certainly not have reservations, but Kenyo Fuan is the most conspicuous of the absentees.
Before suffering injury problems this year, Kenyo Fuan, who played center-back, started five consecutive games in Japan, maintaining three clean sheets. If he could play, he would definitely be in the big list.
The logical conclusion is that the players are still not ready to return to the field this month and that last night's match against Liverpool was not in the squad.
Prior to this game, Arteta confirmed that the Gunners were trying to get Kenyo Fuan back to the game, but after another injury after the last comeback, they were cautious about the players playing.
Despite an injury in his last appearance against West Ham, Chambers is expected to return from injury to face old-time boss Arsenal.
The Daily Mail reported that while last Sunday's facial injury required stitches, Chambers is expected to play against the old lord this weekend.
Chambers was hit in the face by West Ham's Dawson on Sunday, but it looks like he won't miss the next game.
In other news about Villa, Digne will miss the match against Arsenal due to an tendon injury against West Ham, while Douglas Luiz is another player who has made a dubious appearance due to a facial injury.
Villa have been very strong lately. After a 1-2 defeat to West Ham, they easily won three straight, beating Brighton 2-0, Southampton 4-0 and Leeds United 3-0.
On the other hand, they had a poor record against the top-ranked teams and lost all of them this season against the top-8 teams.
So it's unclear if they've turned things around after Di negne, Coutinho and Chambers joined, or if they've only had a lighter schedule.
Arsenal certainly want the latter, with Chambers as the losing side.