- 2022 - 2025 Who Participate in Policy Makinf of Local Government System?
- 2020 - 2023 Comparative Study of the Consequence of Decentralization Reform
- 2019 - 2023 Analysis of Separated Party Organization between the Federal and Provincial Governments in Canada
- 2017 - 2020 Comparative Study of Intergovernmental Power Change between Central and Subnational Governments
- 2015 - 2019 Comparative study on legislative turnover rate
- 2015 - 2018 Public Policy for Happiness
- 2013 - 2016 The Politics of Local Decentralization: Comparative evidence from Japan, Canada, Deutch, Chile, U.K., and France
- 2013 - 2015 Rethinking public policy success
- 2011 - 2013 Comparative Study of the Political Route in the Fianacial Transfer Reform in Japan and Canada
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International Political Science Association
, THE JAPANESE ASSOCIATION FOR CANADIAN STUDIES
, Public Policy Studies Association, Japan
, THE JAPANESE SOCIETY FOR PUBLIC ADMINISTRATION
, JAPANESE POLITICAL SCIENCE ASSOCIATION