Norichika Aoki was batting .252 at the end of July.
As of 8/25, Aoki is batting .279.
Here's a chart that might be of some interest:
It might be easy to guess why I picked 8/1 as a starting point, but 8/8 might not be. 8/8 happens to be the day when Aoki moved from batting first to third.
For most of the first half of the season (every game between April 3 to July 3, except for two games on 4/24 and 4/26), Aoki batted third. On July 4th, they moved him up to the lead-off spot. And then on 8th, they moved him back.
It's still hard to say whether or not Aoki is finally over his slump, but the numbers are certainly promising. And with Jamie D'Antona out for at least another week (could be more but I haven't come across any recent updates on his injury), the Swallows can certainly use Aoki's hot bat.
One other note: Aoki collected 77 hits over the first 4 months of the season. There's still 6 more games left in this month and he already has 30.