- 2023 - 2028 Symbol Emergence Systems Theory for Qualia Structure
- 2023 - 2028 Qualia Structure: Establishing super-interdisciplinary research program to bridge a gap between subjective conscious experience and scientific objectivity
- 2021 - 2026 語意の分析的特性はどのように生まれるか:記号コミュニケーション発達の視点から
- 2020 - 2025 音象徴進化仮説ー普遍性から言語個別性、身体性から抽象性・体系性へ
- 2018 - 2022 Semantic systems emerge from social interaction: The effect of shared-intentionality on semantic reorganization process.
- 2017 - 2021 Depth of Vocabulary Knowledge of JSL children and its relation to academic and inference skills: From the Perspective of Cognitive Science
- 2016 - 2021 Why linguistic symbols should and should not be arbitrary: An integrative account from language evolution, acquisition, and brain functions.
- 2014 - 2019 Constructing a semantic system: how do children update the semantic knowledge in communication with others
- 2014 - 2018 The structure and characteristics of the improvised narratives in the interaction between a care-taker and his/her child
- 2011 - 2013 子どもの意味から大人の意味へ:複数語の関係理解に基づく意味の再編成過程のモデル化
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