The tweet about "bad rumours" associated with a Japanese developer does make me wonder if it's more of a personal matter, rather than a professional issue (in which case, I suspect that even someone as forthright as Kamiya would not air it in public).
EDIT:
...that's assuming that it's related to the person Kamiya is talking about, of course. And that's the problem with these kind of tweets - it's far too easy to start making associations where there are none, or leaping to conclusions about who he's talking about.
