the official Japanese Pokémon GO website has published a new post with more details about the upcoming Pokémon GO Park event in Yokohama, Japan.
The previously announced Pokémon GO Stadium event is taking place during the same timeframe (Aug 14).
The event is taking place in Yokohama Red Brick park and the Cup Noodle Museum Park which have now been renamed and repurposed as Kanto Park and Johto Park! In each of the respectable park areas Pokémon from the corresponding region will spawn more often.
Special event only 2KM eggs will be available at all of the event specific PokéStops, containing Pokémon which do not usually hatch from that egg group.