Dialectal Phylogenetic Geography : Clarifying the History of Ryukyu Archipelago Formation through Historical Linguistic Research

琉球列島全域の言語地理学的な調査の資料を使って、構造的比較言語地理学を基礎にしながら、音韻論、文法論、語彙論等の基礎研究と比較言語学、言語類型論、言語接触論等の応用研究を融合させて、言語系統樹の研究を行なえば、琉球列島に人々が渡来、定着した過程を総合的に解明できる。言語史研究の方法として方言系統地理学を確立することを提案する。This paper advocates the establishment of a field of "dialectal phylogenetic geography" as a method of historical linguistics. Linguistic phylogenetic research of Ryukyuan languages and dialects will clarify the historical processes of people's migration and settlement on the Ryukyu Islands more comprehensively. By fusing basic research such as phonology, grammar, and lexicology, with applied research, such as comparative linguistics, linguistic typology, and language contact, utilizing research materials from linguistic geography that is based on structural linguistic geography in the historical and comparative field, can we better understand these processes