- 2022 - 2025 Systematic reconstruction of Max Weber's sociology based on organization system theory
- 2018 - 2022 Reconstruction of causal analysis based on isomorphism between "adequate causation" and statistical causal inference
- 2015 - 2018 The Reconstruction of interpretative sociology and communication system theory with Bayesian statistics
- 2012 - 2015 Autopoietic system theory and functionally differentiated society
- 2009 - 2011 Autopoietic system theory and generation of the city as meaning-system
- 2004 - 2006 Research on differentials over generations and social system for incentive promotion
- 1993 - 1994 Inquiry into Public Decision Systems Enabling the Preservation of the Environment : a philosophical and systematic analysis of the ideals concerning the environment
- 1992 - 1994 Theorical and Empirical Study on the Modern Structure of Social Stratification
- 1990 - 1991 高度技術社会における若者の対人関係の変容
- 1990 - 1990 高度技術社会における若者の対人関係の変客
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