A survey on the historical nature of the central vowels in the peripheral Japanese dialects.

为了把握日本周边方言中心元音的历史性质，2003-2004年的调查主要从以下几个方面进行：以琉球方言为研究重点：(1)以调查者所编制的语音数据库为基础的历史调查；(2)以有中心元音的方言为研究对象，通过实地考察完成语音数据库；(3)提出了包括琉球方言和东北方言在内的日语历史中中心元音产生的假说；《mon “Hitotsgana-Ben”北奄美方言的历史性质》发表于《日本音音学会学报》第8-1期，《北奄美方言音位系统的特征》发表于《岩手大学教育学院年报》第63期。关于2,2003年在琉球群岛南部的初间岛和2004年在竹美岛分别进行了系统的音系研究和数据记录。至于3、“Zuzu-Ben（有中心元音的方言）是不是古老的？”这是研究员在岩手大学语言文学研究会（gandai - goun - gakkai）年会上的发言。在这次讲座中，研究者提出了一个假设，这个假设首先阐明了包括琉球方言和东北方言在内的日语集中的整个过程。

To grasp the historical nature of the central vowels in peripheral Japanese dialects, the investigation in 2003-2004 has been executed through the following points of view, especially focusing on the Ryukyuan dialects1)the historical survey based on the sound data-base that has been compiled by the investigator2)the completion the sound data-base through the field research aiming at the dialects that have the central vowels3)formulation of the hypothesis on the generation of the central vowels in the history of the Japanese language including both the Ryukyuan dialects and the Tohoku dialectsAs for 1, 'The Historical Nature of the mon "Hitotsgana-Ben" Northern Amami Dialects' was published in "Journal of the Phonetic Society of Japan 8-1" and 'The Characteristics of the Phonemic Systems of the Northern Amami Dialect' was printed in "Annual Report of the Faculty of Education Iwate University 63".As for 2, a systematic phonological research and a digital-recording using DAT was executed at Hateruma island in 2003 and at Taketomi island in 2004, both located in Southern part of the Ryukyu archipelago.As for 3, 'Whether Zuzu-Ben (the dialects that have the central vowels) is old one or not?' was addressed by the investigator at the annual conference of Gandai-Gobun-Gakkai (The Society for the Study of Language and literature at Iwate University). In this lecture the investigator presented the hypothesis which first clarified the total process of centralization of Japanese language including the Ryukyuan dialect and the Tohoku dialect.