Sponsors
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							Endangered Languages and Dialects in Japan, NINJAL
  
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							Core Project “Linguistic Dynamics Science3” (LingDy3), Research Institute for Languages and Cultures of Asia and Africa (ILCAA), Tokyo University of Foreign Studies (TUFS)
  
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							Grant-in-Aid for Scientific Research (S) Comparative historical research on Ryukyuan by using linguistic family trees
 