GPSS is a premium sponsor of the Japan Sustainable Investment Forum (JSIF). JSIF is actively promoting and developing sustainable investments (SRI and ESG investments, etc.) that are actively carried out in Europe and the United States.

GPSS joined Long Term Infrastructure Investors Association (LTIIA). Their vision is to facilitate and promote private investment in infrastructure which enables long-term, sustainable development of communities, countries and regions.

The Nikkei ESG Management Forum is a membership organization whose three pillars are: ESG-related “disclosure," “data gathering," and “data analysis."

The "Guardian Forest Project Public Interest Incorporated Foundation" is modeled after the "Guardian Forest" which saved people's lives in the Great East Japan Earthquake and the Great Hanshin Earthquake, and prepared a regional green infrastructure to coexist with nature.