It seems that Hideo Kojima is once again busy checking Metal Gear Solid V: Ground Zeroes, which is pretty close to release now (less than three months). This time he seems to be checking the next gen versions, judging by the DualShock 4 on the table.
“Checking game in suit.”
It also looks like he’s playing the English version, since there are Japanese subtitles, and the titles on the second image are in English as well. But he didn’t provide any further details on which version he is checking.
Source: Hideo Kojima Twitter