I don't think the issue is being a jr.idol it's more what kind of gravure you are doing, there are plenty of jr. idols that do videos of them just running around doing stuff with no lingering shots of their ass or crotch and such, that kind is absolutely harmless.
I have not seen any of Ai Shinozaki's jr. idol stuff though so I'm not sure what kind she did.
EDIT: I did a quick search and the stuff I saw looked pretty much as I described above, it seemed harmless.
At first: Thanks a lot
gokkunfan for all these "old" sets. It was really the right thing to post to relax the tense discussion that has had build up here.
@Immergeil That is about spot on, I think. Junior Idols who have become very famous like Ai Shinozaki, Saaya Irie or Rina Koike were doing tame stuff at that age. They were also showing a lot of skin in some of their releases, but not as much as many Imouto Idols like Tomoe. Furthermore things like positions and exposure are a big difference, too. As you said shots in positions like ass-up to the camera or wide open legs with the angle pointing right between them show the difference to Ai Shinozaki or Saaya Irie. Even considering Tomoe wasn't the most revealing and "extreme" of Imouto she still was part of that group of Imouto Idols and thus gets judged as one of them.
Also Saaya, Ai or Rina were actresses or part of a girl group at a very early age which was supporting their career big time and moving them in the right direction to become more and more "mainstream famous".
@Kamikatsu You are a really lucky guy.
My heart was beating fast while reading your posts.
I think I would have almost fainted being at that restaurant and seeing Tomoe. If I would have managed to stay conscious I would have been going down on one knee to ask her for a date. Though Tomoe most likely wouldn't understand what I say.