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ILCAA Joint Research Project

The Origin of "Sharing": Aspects of Coexistence in Humans and Nonhuman Primates (jrp000287)



  • sharing
  • coexistence
  • human evolution
  • anthropology
  • primatology


  • Unspecified



About the Project

Project term: April, 2023–March, 2026

Human beings share various things and activities; we observe “sharing,” which varies with culture and society. The society of nonhuman primates also shows an early sign of “sharing.” Considering the generation and formation of “sharing” as an epoch-making event in the evolutionary history of human society, this project conducts interdisciplinary research on its origin in anthropology and primatology. The project investigates cases of “sharing” among human beings and nonhuman primates to examine (1) the process through which “sharing” has accelerated coexistence with others and generated gregariousness and (2) the contribution that it has made to the evolution of sociality.

Kaori KAWAI, Project Coordinator



  • Kaori KAWAI


  • Tatsuro KAWAZOE

Joint Researchers

  • Jun BABA
  • Miki IKOMA
  • Yuji IWATA
  • Kazumi NATSUHARA
  • Masaki SHIMADA
  • Tomoyuki TAJIMA
  • Juichi YAMAGIWA
  • Koichiro ZAMMA



The 4th meeting

  • Date/Time: Sat 22 Jun 2024 13:30–18:30
  • Venue: 304
  • Language: Japanese
  • 1. Tomoyuki TAJIMA (Osaka University)
    Rethinking the Forms of Food Sharing in Primates, Including Humans
    2. Taro YAMAUCHI (Hokkaido University)
    Sanitation as “Regeneration”: From Disposal of “Bads” to Sharing of “Lives”

The 3rd meeting Report (Japanese)

  • Date/Time: Sat 9 Mar 2024 13:30–18:30
  • Venue: 306
  • Language: Japanese
  • 1. Yuji IWATA (Ashinaga Foundation)
    “Inquiry about asymmetricity of sharing”
    2. Kazumi NATSUHARA (Toho University)
    ““Caring” and “Sharing” (tentative)”

The 2nd meeting Report (Japanese)

  • Date/Time: Sat 23 Dec 2023 13:30–18:30
  • Venue: 306
  • Language: Japanese
  • 1. Koji KITAMURA (Professor Emeritus at Okayama University)
    “Contrasting understandings of interactions including gift in the societies where the reciprocity of gift is normative or not.”
    2. Kaori KAWAI (ILCAA)
    “What is 'sharing' and are hostile interactions over livestock among East African pastoralists 'sharing'?”

The 1st meeting Report (Japanese)

  • Date/Time: Sat 29 Jul 2023 13:30–18:30
  • Venue: 304, Online meeting
  • Language: Japanese
  • 1. Kaori KAWAI (ILCAA)
    2. All members
    3. Tomoyuki TAJIMA (Osaka University)
    “Concept of “sharing” in Primatology”
    4. Jun BABA (Wako University)
    “Concept of “sharing” in Anthropology”

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