Japan’s Government Pension Investment Fund has nearly $1.5 trillion in assets and a legion of...: Japan’s Government Pension Investment Fund has nearly $1.5 trillion in assets and a legion of external asset managers running its portfolio. The GPIF sees itself as a “super-long-term investor” with the goal of a century or more of sustainable investment and outflows. Managing money for that long is a matter of stewardship, not just picking assets — and in the past few years, the GPIF has included environmental, social and governance factors as part of its stewardship responsibilities.