idk, i think they're fake, personally. lol. just because it's in Japanese, it can mean a Japanese fan is impersonating them.
and while "Kame" posts food, the ones with him in them can easily be screencaps or magazine scans.
and i think JE would actually...post something official if they had Twitters. but yeah, J-webs are the only legit real blog thing the guys have.