- 2024 - 2028 子どもの数量概念を促す保育者の専門性に関する仮説モデルの検証
- 2020 - 2023 The issues of educational and developmental support for children of international marriage homes
- 2018 - 2023 幼児期の認知発達にふさわしい教育とは:子どもが「遊び」の中で学んでいること
- 2012 - 2015 A developmental study of children's logical and intuitive thinking: The relationship between numerical concepts and cognition of imaginary world.
- 2009 - 2011 Development of numerical concepts observed in children's utterances in kindergartens and elementary schools and its relationship to mathematical education
- 2006 - 2009 An investigation on the curriculum and teaching plans that would guarantee the process of learning suitable for preschoolers
- 2006 - 2008 Numeracy observed in children's play and its relationship to cognitive development on equal distribution
- 2004 - 2006 A comprehensive study on the embodiment in understanding of number
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