Japan governments pension fund is the worlds biggest with US$1.2 trillion in assets

"Japan’s Government Pension Investment Fund, the world’s biggest pension fund with $1.2 trillion in assets" 

Source:Japan's public pension fund may shift funds to stocks from bonds

By Chikafumi Hodo 

August 7th 2013 

Japan Today 

http://www.japantoday.com/category/politics/view/japans-public-pension-fund-may-shift-funds-to-stocks-from-bonds