1) The document discusses economic and demographic trends in Japan and the BRICs countries (Brazil, Russia, India, China).
2) It provides data on GDP, population size, growth rates, average age, literacy rates and other metrics for each country from sources like the UN.
3) The data shows China and India having the largest populations that will continue growing, while populations in Japan, Russia and eventually China will decline. It also compares the economic potential of the BRICs to surpass G6 nations by 2050.