The largest site on Japanese idols is DMM.com. Free membership is essential to login to this site. Unfortunately, the company declared that the files are to be downloaded only inside Japan.
On the other hand, another Japanese idol site, u18.tv, officially announced that they allow files to be downloaded outside Japan, too.
Other advantages of u18.tv are:
- They deal with independent labels, too, so the “hidden” videos of then-not-popular idols, Ai Shinozaki and Yukie Kawamura, for example, are found.
- Girls right after their debuts are here. Your favorite would be well known and popular in the future.
- Videos of younger idols are easily found.
- Sexier videos of junior idols are found.