Niantic with the Pokemon GO and TOHO Cinemas announced the collaboration on August 9, 2016 in Japan but the official press information just today published.
In this collaboration project all the TOHO Cinemas will be PokéStops in the Pokemon GO in Japan but Niantic currently working on the update to add the TOHO Cinemas as new stages into the game. The exactly cinema list and the available date will be published later but we sure it will be integrated at least in the 2 weeks release regular update. Stay tuned for more information!
TOHO Cinema: http://www.tohotheater.jp/news/pokemon_go_toho.html