This is the fanclub of Dir en grey, you can join if you are Japanese, have a Japanese address, besides you have to pay the registration and the membership fees that are 6.000 Yen all together. What are the benefits of joining?
When you become a member, you will receive a membership package that is not sold anywhere else: a metallic card with your membership number engraved in it; and a keychain, that you can carry anywhere you'd like!
You will also get membership offers that are for members only. Offers include special presents, news and information. You'll get a newsletter called "Haiiro no ginka" 4 times a year; you can reserve concert tickets earlier; you can buy official goods through mail order; special live show are held for 「A KNOT」 members ONLY.

At the moment, the fan club is only limited for people who live in Japan, but the band hopes they can accept overseas people too later.