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ILCAA Joint Research Project

A sociolinguistic study of heritage languages and ethnic identities of migrants

A sociolinguistic study of heritage languages and ethnic identities of migrants


  • migrants
  • heritage languages
  • ethnic identities
  • sociolinguistics
  • methodology


  • Europe
  • West Asia
  • Central Asia
  • South Asia
  • Southeast Asia
  • East Asia
  • North & Northeast Asia
  • Oceania & Pacific Ocean
  • North America & Caribbean
  • South America



About the Project

Project term: April, 2021–March, 2024

  Various factors influence whether an immigrant community continues to maintain the language and culture of its home country despite generational shifts or assimilation into the language usage patterns of the host country. This research project investigates this issue from the perspectives of heritage language education and ethnic identity formation. Building on an initial discussion of the research methods employed in previous studies, this project aims to propose a methodology which enables comparisons between the various language situations faced by immigrant communities in Asia, Oceania, Europe, and the Americas.

Mayumi ADACHI, Project Coordinator
(Assistant Professor, ILCAA)



  • Mayumi ADACHI (ILCAA)


  • Norikazu KOGURA

Joint Researchers

  • Yasuhiro ARAI
  • Tooru HAYASI
  • Junko HIBIYA
  • Fumiya HIRATAKA
  • Jae Ho LEE
  • John C. Maher
  • Kazuko MATSUMOTO
  • Naoki OGOSHI
  • Akiko OKUMURA
  • Daniel Quintero García
  • Mizuki SAKURAMA
  • Sachi YOSHIDA



The 2nd meeting/ The 27th Tokyo Academic Forum on Immigrant Languages Report (Japanese)(427KB)

  • Date/Time: Thu 2 Sep 2021 9:00–12:30
  • Venue: Online meeting
  • Organized by Core Project “Linguistic Dynamics Science3 (LingDy3)”
  • Cooperated by Tokyo Academic Forum on Immigrant Languages
  • 9:00-9:10 Mayumi ADACHI (ILCAA)
    9:10-10:00 Mizuki SAKURAMA (ILCAA Joint Researcher, JSPS Postdoctoral Fellow/Waseda University)
    “The Process of Language Choice in a Multi-Lingual Environment: A Qualitative Analysis Using a Grounded Theory Approach”
    10:10-11:00 Rika YAMASHITA (ILCAA Joint Researcher, Kanto Gakuin University)
    “From linguistic landscape to semiotic landscape: Exploring cases of Pakistanis abroad”
    11:10-12:00 Joy TANIGUCHI (ILCAA Joint Researcher, Shizuoka Institute of Science and Technology)
    “A qualitative method for children's languages in multilingual environments”
    12:00-12:30 All participants

The 1st meeting Report (Japanese)(511KB)

  • Date/Time: Sun 9 May 2021 14:00–17:30
  • Venue: Online meeting
  • 14:00–14:10 Mayumi ADACHI (ILCAA)
    14:10–15:00 Junko HIBIYA (ILCAA Joint Researcher, Sacred Heart School Corporation)
    “Heritage Language Variation and Change Project (HLVC)”
    15:10-16:00 Kazuko MATSUMOTO (ILCAA Joint Researcher, The University of Tokyo), Sachi YOSHIDA (ILCAA Joint Researcher, Atomi University), Akiko OKUMURA (ILCAA Joint Researcher, The University of Tokyo)
    “On the role of ethnicity in linguistic variation: Four diaspora case studies from the Greater Tokyo Area and Sakhalin in the Russian Far East”
    16:10–17:00 Tooru HAYASI (ILCAA Joint Researcher, The Open University of Japan)
    “Rethinking the value of indecisive respondents for questionnaire surveys”
    17:00-17:30 All participants

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