Well, there are two issues I see with this one, the first being that I don't think it's Japanese from what I can tell. They do use some Japanese artists, but the graphic novels are created and published elsewhere, in many cases they are written by other, non-Japanese authors. In my opinion, since we decline Korean manwha, I see a parallel here ... unless you can correct me and show me that they are released in Japan?
As far as the lines of manga, I agree with Danielle. CLAMP is another example of a "line" that we have not approved; you can apply for the individual series and/or one shot works, but not the line as a whole.
If you have further questions or want to discuss more, please contact me, I'd be glad to talk it over :flower: