SoftBank has been investing in many companies around the world, including some that are already operating in Brazil such as U.S. office-sharing startup WeWork.
Protesters have targeted the airport before, occupying the arrivals hall, blocking approach roads and setting street fires in the nearby town of Tung Chung.
Sales of such apartments also exceeded the numbers racked up for each full year from 2011 to 2018, the consultants' analysis of transaction data shows.