During the “Take the Treasure” live stream, Atlus announced that they would be hosting a Persona 5 launch event at Tokyo Game Show 2016 on September 15. The game is also set to launch in Japan on that date.
The official website for the event can be found here, with a countdown to the event.
More information on the launch event will be released in the future.
TGS 2016 this year will be held, as always, at the Makuhari Messe convention center. It will officially start on September 15th, lasting until September 18, 2016.
Persona 5 is slated to be released for the PS3 and PS4 in Japan on September 15, 2016, and in China on the same date for the PS4. It will have a February 14, 2017 North American release date, and the game has been announced for a European release.