Hello!
OK, how shall I explain this. Normally, seats which are on the first floor are normally called ARENA seats, but it seems that for Yokohama, the arena seats are up a floor at the side, while the traditional so-called arena seats are called CENTER seats here.
Now, the CENTER seats listings I have are 2 in block C1, and 2 in block C3. The C1 tickets are 13,500yen each, the C3 tickets are 30,000yen each. So there's this huge price disparity even though the seats are roughly equal dist from the stage. One more thing, CENTER block C is near the back of the venue, about as far from the stage as the ARENA block A seats, if you look at the picture in your link. One thing you can hold onto is that if ayu has a center stage (the round one), you
might be able to see her clearly when she's there.
Hope this helps abit.
