- 2023 - 2026 文末形式の談話機能に関する類型論的研究ー日本語と韓国語を中心にー
- 2021 - 2025 Theoretical and empirical study of the cognitive basis of spatio-temporal mapping
- 2021 - 2024 フィールドデータのアーカイブに向けた問題点の整理と解決策
- 2020 - 2023 Constructing a semantic theory of modal expressions without the concept of possible worlds - evidence from Japanese
- 2019 - 2022 終助詞に関する類型論的研究-日本語と韓国語を中心に-
- 2017 - 2021 Conditionals and topology; the origins of non-monotonicity
- 2017 - 2021 Reconstruction of the proto language of Japanese and Ryukyuan and phylogenetic trees based on comparative linguistic methods
- 2017 - 2021 Experimental studies on the correlation between linguistic and non-linguistic behaviors in the spatial frame of reference
- 2013 - 2017 An attempt to construct data archive for endangered languages: A special focus on the Jeju dialect of the Korean language
- 2012 - 2016 What makes incremental processing possible in Japanese: predictive, integrative, selective use of various sources of information
- 2012 - 2016 A basic descriptive study of the grammars of endangered Ryukyuan and Hachijo languages
- 2011 - 2016 Modeling of analogical mapping among space, time and inference and their verification
- 2014 - 2016 「視点」とモダリティの 言語現象-「意識」、エンパシー、阻止効果-
- 2013 - 2016 危機言語のデータ・アーカイブ作成のための試みー韓国語済州方言を中心に
- 2011 - 2015 時空間・論理領域の間の類比マッピングの形式モデル化とその検証
- 2012 - 2013 危機言語ドキュメンテーションのための電子博物館の拡張
- 2009 - 2013 テンス・アスペクト・モダリティの相関について-日本語と韓国語を中心に-
- 2011 - 2013 英語による上代語東国方言の語源辞典の作成
- 2011 - 2012 琉球語宮古池間方言をモデルとした 消滅危機言語と文化のための電子博物館作成とシステム開発
- 2011 - 2012 日本語における焦点小辞の意味論とプロソディ
- 2009 - 2012 The correlation of tense aspect and modality -in Japanese and Korean-
- 2010 - 2011 消滅危機言語の電子博物館作成のためのシステム開発
- 2010 - 2011 宮古諸方言と他の琉球諸語-記述と比較歴史的研究
- 2009 - 2011 朝鮮時代に於ける日本語学習書の電子化、言語学的考察及び英訳
- 2009 - 2010 琉球方言デジタルアーカイブの構築と電子博物館との連携化
- 2007 - 2010 Inferential Mechanisms and their Linguistic Manifestation
- 2007 - 2008 Integrated Research on Prosodic Structure, Grammaticality and Sentence Comprehension
- 2006 - 2007 上代と中古日本語における統語変化
- 2004 - 2006 Theoretical and empirical studies of the interaction between the language use and grammatical rules
- 2003 - 2006 The Logic of Everyday Inference and Its Linguistic Forms : With Special Reference to Quantificational Expressions, Conditionals, and Modal Expressions
- 2003 - 2005 Theoretical and empirical studies of reference and anaphora ...Toward the establishment of generative grammar as an empirical science ...
- 2001 - 2003 Semantics and Syntax of Japanese Formal Nouns
- 2001 - 2003 Theoretical and empirical study of cognitive scales and their linguistic expression
- 2000 - 2002 Theoretical and Empirical Studies of Ellipsis---Toward the establishment of generative grammar as an empirical science---
- 1998 - 2000 Toward the Construction of a Language Model Integrating Syntactic, Semantic and Discourse Information
- 1996 - 1998 A Theoretical Study of Interface Between Syntactic and Discourse Structures
- 1996 - 1998 Comparative Syntax of Japanese, Korean, Chinese and English
- 1994 - 1995 A Cognitive Study Of Situatedness In English And Japanese-to ward a flexible natural language processing systems-
- 1993 - 1995 音声言語による対話過程のモデル化に関する研究
- 1992 - 1993 A comprehensive study of the function and typology of language
- 1992 - 1992 音声文法の試みー統語構造・情報構造と韻律的特徴との対応関係に関する研究ー
- 1991 - 1992 A PARAMETRIC APPROACH TO SYNTACTIC AND PRAGMATIC COMPARISON OF JAPANESE,KOREAN AND ENGLISH
- 1990 - 1992 高度な日本語記述文法書作成のための基礎的研究
- 1989 - 1989 US-Japan Cooperative Research on the Fundamental Problems of Computer Software - Natural and Program Languages viewed from Semantics
- 1988 - 1989 Theoretical and Empirical Study of Context-Sensitivity of Japanese
- 1988 - 1988 言語の文脈情報処理の研究
- 1985 - 1988 文脈処理モデルの導入による機械翻訳システムの高度化に関する研究
- 1987 - 1987 言語の文脈情報処理の研究
- 1986 - 1986 言語の文脈情報処理の研究
- 1984 - 1986 Investigation and Analyze of Language feed-back of Chinese learners.
- 1985 - 1985 朝鮮語と日本語の対照言語学的研究
- 1984 - 1984 朝鮮語と日本語の対照研究-朝鮮語・日本語教材作成のための言語学的基礎研究-
- 1983 - 1983 朝鮮語と日本語の対照的研究-韓国人用日本語教材作成の為の言語学的基礎研究-
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- 2023/04 - 現在 National Institute for Japanese Language and Linguistics Invited professor
- 2023/04 - 現在 National Institute for Japanese Language and Linguistics Professor Emeritus
- 2016/04 - 現在 Kyoto University Professor Emeritus
- 2017/10 - 2023/03 National Institute for Japanese Language and Linguistics Director-General
- 2018/04 - 2021/03 Linguistic Society of Japan President
- 2000/10 - 2016/03 Graduate School of Letters, Kyoto University Department of Linguistics Professor
- 2014/10 - 2015/09 National Institute for Japanese Language and Linguistics Invited professor
- 2010/04 - 2014/03 National Institute of Japanese and Linguistics Invited Professor
- 2007/03 - 2007/06 Carleton College, USA Program in linguistics Fulbright Scholar in Residence
- 2001/06 - 2001/08 University of California, Santa Barbara. LSA Summer Institute Professor
- 1996/04 - 2000/09 Faculty of Letters, Kyushu University Department of Linguistics Professor
- 1991/04 - 1996/03 Faculty of Letters, Kyushu University Associate Professor
- 1991/04 - 1996/03 Kyushu University School of Letters Associate professor
- 1984/04 - 1991/03 Department of Liberal Arts, Kobe University Associate Professor
- 1984/04 - 1991/03 Kobe University
- 1982/04 - 1984/03 Department of Liberal Arts, Kobe University Japanese and Japanese affairs lecturer (tenure track)
- 1980/04 - 1982/02 Kyungju Campus, Dongguk Univerisity, Korea Department of Japanese Visiting lecturer
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