Companies across Japan have a new name in their top 10 shareholder lists: Government Pension Investment Fund (GPIF). The $1.3-trillion GPIF is the top owner of 121 Tokyo-listed firms. It's the second-biggest holder in Toyota Motor with a 5.5 per cent stake in Japan's largest company. At the latest reckoning, the retirement savings manager owns about 5.8 per cent of the stock market.