^Based on what I've heard/learned...
FC tickets are the best seats (first half of the first floor or so) and are unreachable to us unless you have a friend who lives in Japan and belongs to FC and can apply for one for you; OR if you get lucky and someone is selling theirs on yahoo auction, but auctions.. Who likes auctions ^^;; They also find out what seat they actually got in the draw much later, and not very long before the concert (a week? a month? I forget)
The FC ticket thing happens way early, so knowing that they've probably had to apply for the ticket draw for this tour already... The rest may have to wait until like... One month before the concert, which is when convenience stores or the like start selling (and tend to be not great seats; it's like a lottery so you might end up all the way to the back, or maybe not); if you go for a reseller, you can get it as late as the concert day, for a cheaper price 8D From what I hear resellers tend to not run out of tickets, but it's a bit of a gamble still.
So IDK. It sounds like a complicated process. I wish it was as easy as it was for me to score Lady Gaga tickets