- 2022 - 2025 Multimodal Semiotics for Icons and Indexes in Sign Language
- 2019 - 2023 Linearization of the syntactic structure of sign languages
- 2016 - 2019 A study on the structure of conditionals in Japan Sign Language
- 2013 - 2016 Aspectual properties of predicates and negative sentences in Nihon Shuwa (Japan Sign Language)
- 2011 - 2014 A Colloquial Corpus of Japanese Sign Language: The Growth of Linguistic Awareness between Deaf and Hearing
- 2010 - 2012 The role of abstract and morphological Cases in syntactic computation
- 2009 - 2011 Multimodal Analysis of Simultaneity and Sequentiality in "Utterances" in Spoken Japanese and Japanese Sign Language
- 2006 - 2008 Parameters of the Knowledge of Language : Through comparison of Syntactic Structures of Japanese and Korean
- 2006 - 2008 A study of `utterance'structure of spoken and signed language, and gestures
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