Cross-border energy investments are crucial for achieving a global transition to net-zero emissions. However, these investments, often involving extensive infrastructure projects, can also have significant adverse effects on the environment, human rights, and sustainable development. This brief chapter argues that the concept of energy justice, which encompasses distributive, procedural, and ... [Show full abstract] recognition justice, can extend its influence beyond domestic regulations and be effectively applied to cross-border transactions. By embracing a broader understanding of energy justice, it has the potential to create synergies among international economic treaties, energy laws, human rights provisions, environmental agreements, and other domestic regulations and soft law instruments. Alongside national policy reforms and bilateral agreements, energy treaties like the Energy Charter Treaty (ECT) and mega-regional economic integrations such as the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) and the Regional Comprehensive Economic Partnership (RECP) should consider incorporating principles of energy justice. Another potential approach is the development of an international soft law instrument dedicated specifically to energy justice and responsible investment within the context of global energy transactions. Established frameworks like the UN Guiding Principles on Business and Human Rights or the OECD’s Guidelines for Multinational Enterprises can serve as valuable references in shaping this international instrument.