There are reports out of Japan that many Japanese retailers will be experiencing a shortage in Playstation 4s in the months of August and September. One Twitter user in Japan ( 天才ミニミニ子宮マン) posted this image from retailer Yodobashi Camera.
The message when translated into English says..
From late August to late September 2016, PS4 will be in short supply nationwide, and will go out of stock. Whether to believe this or not is up to the customer.”