Sanspo has a direct quote from Nakjima. Here is the translation:
I'm not satisfied. It's not like I earned my FA option, so it isn't really my decision to make, but I still need to work through things in my head.
Hiroyuki Nakajima met with the Seibu Lions' front office on the 28th and informed them of his desire to be posted to the Majors this off-season. For the Lions, it was apparently the first time they ever heard of Nakajima talking about wanting to go to the Majors.
In any case, the Lions turned down Nakajima's request and countered by saying that they wanted him to help the team win a championship next season. According to an unnamed team source, Nakajima didn't appear to be too happy with the team's decision.