who are they?
Japan’s population began to fall in 2008, but Tokyo’s influx of migrants means that the number of residents within the official boundary of the capital, which accounts for about a third of the total conurbation, won’t decline until the games, the government predicts.
my question is:
in "which accounts for about a third of the total conurbation" who are these "a third of the total conurbation" ? "the influx of migrants"or "the old residents in Tokyo?"
【the complete article is in :http://www.bloomberg.com/news/articles/2015-07-06/world-s-biggest-city-throws-final-festival-before-decline】