I would think they did? There's nothing on the Internet, which is good, because Miyavi's personal life is kept personal.
Now, I don't buy Japanese magazines, and I'm not talking about Arena 37 or visual kei magazines, because those aren't really mean, but I haven't heard of the Japanese paparazzi being bad at all. Like I said, I've never seen Japanese magazines, so I don't know if they have embarrassing pictures of Ai Otsuka or scandals about her written, like they would here. People in the U.S. won't leave the stars alone, and for some of them, this is killing them, ie Britney Spears. So, as of now, my view is that the Japanese tabloids aren't as bad as the ones here.
But it's kind of weird how there isn't even one picture of Meevs and his girlfriend (or maybe not, I don't know anymore ;P)