Sanspo posted an interview with Yoshinori Sato on Tuesday that was conducted by Daisuke Araki.
Araki: It must be fun being able to throw hard.
Yoshinori: Yes. I can't even begin to say how much better things are in comparison to how things were during camp last year. I was at place where I didn't even want to play catch if I felt the slightest hint of uncertainty. I also didn't like throwing in the rain. The pain is gone now and I always want the ball because I'm having so much fun.
Araki: That's really important because if there's something holding you back, it'll show when you pitch. Is there anything you're afraid of throwing?
Yoshinori: No. I think I actually have a better feel in the tips of my fingers for breaking pitches, they seem easier to throw.
Araki: You also threw some sliders.
Yoshinori: Sometimes I get better rotation in my hips when I throw the fastball after I throw the slider.
Araki: When you throw a breaking pitch, you hold things back a little. That might be helping [the fastball]. For me, it was the curve. Those are the kinds of things you need to figure out by yourself.
Araki: What are your plans moving forward?
Yoshinori: I think I need to get my pitch count up to about a hundred. I think I'll have to throw a hundred or more three or four time before I start facing hitters. Maybe pitch in a live environment near the end of March and build things up by pitching in Ni-gun games.
Source: Sanspo 2/25/2014