Hi everyone!

Because I do not live in Japan I nearly have no chance to get tickets for Kat-Tun concerts. 
Therefore I plan to join the official fanclub via fanclub agency, to be able to buy tickets next year. Actually the membership in the fanclub agency (around 40,000 yen incl. membership in the fanclub itself), so I am wondering: 
Did anyone join the official japanese fanclub via fanclub agency (JFCA - Japan Fanclub Agency)? Are they trustworthy?
And does anyone know, if I will get tickets for sure, when I am a fanclub member (in case I am relatively fast with ordering of course)?
Is it generally possible to get tickets for more than just one concert or are the chances low?

Thanks in advance for sharing your experiences!