"Kawakami isn't overpowering; his fastball tops out in the low 90's. His control is good, though not quite as awe-inspiring as Koji Uehara's. And his windup isn't deceptive, like many Japanese pitchers. Kawakami gets by purely on quality stuff.
Kawakami's featured pitch is a cut fastball, which, according to Wikipedia, is known as Japan's finest among visiting MLB All-Stars. He also has a slow curve, which he throws at 65-70 MPH. The rest of his arsenal is fairly typical: fastball, shuuto, fork. He changes speeds pretty well, particularly between his curve and harder stuff."
The Red Sox are expected to make a 3-year $21 million offer to Kawakami, so the Braves would have to beat that. While he's not an ace, Kawakami seems like a fairly low risk, decent upside move.