1. Graduate School of Arts and Sciences, The University of Tokyo, Japan
2. Faculty of Sociology, Kansai University, Japan
3. Great Ape Research Institute of Hayashibara Biochemical Laboratories, Inc., Japan
4. Wildlife Research Center, Kyoto University, Japan
5. JST, CREST, Japan
6. Department of Human Relations Studies, School of Human Cultures, The University of Shiga Prefecture, Japan
7. EarthMate-ChimpanzeeNEXT, Japan
8. Section of Language and Intelligence, Primate Research Institute, Kyoto University, Japan