If you have anymore information on <Chronogate>, please email me.

Official fanclub: <Chronogate>

^-^ Yay~ You can join even if you're overseas. (I emailed their FC and got the reply)

The cost is 6000 yen for the first year (1000 yen for entrance fee) and 5000 for the subsequent years (if you decide to renew). They only accept yen...
You may send 6000 yen in cash to their FC address with your 
address, name, gender, DOB, tel, fax, email, and occupation written down.*
*from the reply I got ^-^)v.... Yay~!

note: (i'm not sure if this is polite to post, but... ;;) the below is from the attach of their mail.
^0^ I'm really happy!! Yayyyyy~
3F, 1-2-10, Shibuya, Shibuya-ku, Tokyo Japan   150-0002
Tel:03-3498-8402 (MON to FRI 13:00-18:00)
Fax:03-3495-5455
e-mail:c-g@qa2.so-net.ne.jp