The official Niantic blog has announced that Pokemon GO field testing will begin later this month in Japan! This is following the news that Niantic’s Pokemon GO presentation in San Francisco was cancelled this month in order to focus on development of the game.
The Pokémon Company and Niantic will be inviting users to field test Pokémon GO in Japan later this month. The Pokémon GO field test program will give users the opportunity to share early feedback and help improve the Pokémon GO experience. Please stay tuned for information about expansion of the field test to other markets.
Thank you for your interest in Pokémon GO.
— The Pokémon GO Development Team
There is still no official release date for the game.