The Tele-Asa Summer Festival is an event held by TV Asahi, the channel which hosts Kamen Rider and Super Sentai. Actors from the two current shows, Kamen Rider Build and Lupinranger VS Patranger, will be there on a daily basis to hold special talk shows, a summer movie special event, and there will be mini live formances for their respective themes. There will also be exclusive merchandise available.
The event will take place at the Summer Station Live Arena in Roppongi Hills, from July 14th to August 3rd.
Source: TV Asahi