Adjunct Researcher
- 2020 - 2023 公共用語の発展的理論と実証調査
- 2020 - 2023 言語レパートリーの構造と形成に関する研究
- 2019 - 2023 小林好日による東北方言通信調査資料の整備と分析
- 2019 - 2023 首都圏における言語資料の高密度収集と言語動態分析
- 2018 - 2021 Continuous Research of a lot of People about the Dynamic State of Tokyo Dialect as a Base of Japanese Common Language
- 2016 - 2020 Sociolinguistic general studies about geographical differences of official language
- 2013 - 2016 A revision of the language ideologies in Japanese modern era and a trial of the philological dialectology on the basis of the local educational materials in prewar erra
- 2013 - 2016 A study to promote comparison and integration of different geolinguistic datasets
- 2013 - 2016 The New Approach to Study Dialect Distribution by Various Types of Dialect Materials
- 2011 - 2016 Clarifying the detail process of dialectal distribution change
- 2013 - 2015 The Current States and Changes of the language in the Tokyo Metropolitan Area
- 2010 - 2012 Study on the Comparison and Integration of Geolinguistic Data and its publication
- 2008 - 2011 Linguistic Geography Research through the reports by the National Language Survey Committee in Meiji period,"The Linguistic Atlas of Japan", and "The Grammar Atlas of Japanese Dialects"
- 2009 - 2010 Geolinguistic Study about the Structure of the Dialect Formation in Saitama Prefecture
- 2007 - 2009 Socio-Psychological Survey on Japanese Polite Expression : The third survey in a longitudinal framework in Okazaki City, Aichi Pref.
- 2005 - 2006 Contrastive and stylistic study concerning written language of Japanese language learners
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