The aim of this paper is to define eco-focused information systems and technology (Green IS/IT) as a crossing between sustainable ecosystem (SE) and business ecosystem (BE) research. This paper examines 1,001 ecosystem studies covering sustainable, social, industrial, innovation, platform, and information technology ecosystems. Japanese newspaper entries on 833 ecosystem topics involving successful Green IS/IT implementation are also investigated. Our analysis suggests that Green IS/IT study can be positioned as an important ecosystem research agenda at the intersection of SE and BE. At present, SE and BE are studied separately, and empirical research is fragmented into subthemes.