Well, because the PSN Store is still offline in Japan. Thus, the Armored Core V closed PS3 beta is now being delayed. It was originally slated for July 1, but is now dependent on when the PSN Store goes back online in Japan.
https://lastchance.cc/well-the-psn-still-isnt-online-in-japan-5815157%3C/a%3E%3C/p%3E
ARMORED CORE V CLOSED BETA TEST | FromSoftware [FromSoftware via オレ的ゲーム情報]