a-nation Ayu at what time?

[RPGames]

Hi hi~

I have a question.
When does a-nation start?
For 8/1.

It says this:
開場/開演　13:00/15:00

So that means that it opens up at 13.00 and that the first artist sings at 15.00, right?

Does it immediately start with the good artists (Koda Kumi, hitomi, etc.) or does it start with other unimportant artists? If the latter, when do the good artists start?

I don't want to miss TRF, Kumi, Ayu, hitomi, etc. so it's difficult for me to know when i have to arrive. ><