The original release event was planned for 3/12 but the Earthquake as well as the tsunami pushed the event back. According to the H!P announcement nothing has changed regarding the time and place, the event will still be at Yokohama BLITZ (Kanagawa). The only difference is the date itself.
Hopefully all fans are able to attend the event and hopefully the event is a success and goes through safely.
The event will be held on 6/18.