Here is Sawamura's NPB Tracker Data:
Sawamura threw it as hard 92.38 to 95.48 MPH with sink, but also showed the ability to throw it high. So basically he can work both eye levels. He got some whiffs with it but gave up several baserunners. He seemed to be really fastball heavy early on and it wasn't until late in the game that he got late into the game.
The fastball moves, that is, it isn't straight. It is a MLB fastball. His average fastball may be a little under average, but he can run it up there with some authority when needed.
The control of this pitch was not very good, and it was his main breaking pitch:
The curveball seemed the be the least used pitch (as evidenced by it being what is probably the worst video).
For a guy who has dominated the NPB, the outing against Lotte was not very good, as he struggled with command and control through out. However, even though it wasn't his best day, he still showed good velocity, missed some bats, and looked like a pitcher who might be able to succeed in the Majors with, possessing two decent breaking pitches.
Here is the heat map for the game he threw the most pitches in 2012 (unfortunately, NPB tracker does not have heat maps for seasons, just individual games):
Depending on his control, I could see him being an average to slightly below average starter in the big leagues. He has the fastball to be a big league starter and has shown durability and has had success at a relatively young age. As almost always, the key to success will rely on the development of his breaking pitches (which look okay) and control.