Erratum to: Sustain Sci (2009) 4:99–116 DOI 10.1007/s11625-008-0063-z

The following sentence was inadvertently omitted from the Acknowledgments:

This work was also supported by the Global Environment Research Fund (Hc-082) of the Ministry of the Environment, Japan.

The corrected Acknowledgments should read:

This research was supported by MEXT through Special Coordination Funds for Promoting Science and Technology, as a part of the IR3S flagship research project “Development of an Asian Resource Circulating Society” undertaken by Osaka University and Hokkaido University. This work was also supported by the Global Environment Research Fund (Hc-082) of the Ministry of the Environment, Japan. This study was made possible through a series of workshops on SS knowledge structuring coordinated by the Osaka University Research Institute for Sustainability Science (RISS). We would like to extend our sincere appreciation to Associate Professor Steven Kraines (University of Tokyo) for his invaluable comments and advice. We would like to thank Assistant Professor Michinori Uwasu (RISS) for organizing these workshops and Mr. Mamoru Ohta (Enegate Co., Ltd.) for supporting the development of Hozo and collecting the relevant information for the SS ontology. We gratefully acknowledge helpful discussions with Professor Hideaki Takeda and Associate Professor Masaru Yarime on several points of SS knowledge structuring.