Yokohama Arena seating

I bought tickets for EXO CBX'S concert in Yokohama Arena and I'm unsure where I will be　standing. My ticket says;
アリーナA
立見
56番
My ticket is standing but I'm unsure since I think that アリーナ is seated.
If anyone knows it would be a great help!

立見 means that you stand on your two feet as you watch the stage.

アリーナ is what the venue calls the huge floor lower than the stage. In other words, it's not a balcony.

A is the block, and I haven't checked but 56 is probably your reference number or some kind of standing point number. 番 means "number" anyway.

So, the huge floor is divided into blocks, and within your block there will be many people standing, but you won't be allowed to stand outside your block.

Either way, you seem to have a pretty good ticket.