| 2020 | IROS | Examination of Screen-Indicated Methods of Gait Training System with Real-time Audiovisual Feedback Function of Ground Reaction Force | Kei Fukuyama, Ichiro Kurose, Hidetaka Ikeuchi |
| 2020 | SMC | A Decision Support System for Inexperienced Volunteer Guides to Assist Increased Inbound Tourists in Japan. | Masahiro Okazaki, Yuki Ohira, Kei Fukuyama, Masashi Kuwano, Akira Ishii |
| 2018 | SMC | Tourists' Cognitive Structure of Small-Scale Regional Tourist Sites. | Masashi Kuwano, Keishi Tanimoto, Kei Fukuyama |
| 2014 | SMC | On strategic behaviors and prevention rules in participatory group decision processes. | Kei Fukuyama, Hiroshi Nagafuchi, Hikaru Fujita, Jong il Na, Hiroshi Kawabata |
| 2013 | SMC | Conflict Analysis on the Enforced-Move-by-Majority Rule in a Group Decisionmaking Situation. | Kei Fukuyama, Jong il Na, Takashi Kawabata |
| 2012 | SMC | Locating vendors in Stackelberg competition in a linear monocentric city. | Kei Fukuyama, Jun Kimura, Yuki Ikeda |
| 2011 | SMC | Analyses on duopoly vendors in a small-open city. | Kei Fukuyama, Jun Kimura, Yusuke Sunano, Yuki Ikeda |
| 2009 | SMC | Analyses on Continuance of Unpopular International Airline by Local Government. | Kei Fukuyama, Yuki Ikeda |
| 2006 | SMC | Regional Conflict and Cooperation on Inter-Regional Infrastructure: A General Equilibrium Approach. | Kei Fukuyama, Masafumi Tamura |
| 2005 | SMC | Incentives and hesitation: a decision theoretic analysis of the consolidation of Japanese municipalities. | Kei Fukuyama, Komei Sasaki |
| 2004 | SMC | Local consolidation of link-type infrastructures. | Kei Fukuyama |
| 2003 | SMC | Consolidation of network infrastructure by competitive local governments. | Kei Fukuyama, Masafumi Tamura |
| 2002 | SMC | Effects of information incompleteness on provision of local public services by competitive local governments. | Kei Fukuyama |
| 2000 | SMC | Effectiveness of social systems sustained by residents' participation: a collection system of classified garbage and rubbish. | Kei Fukuyama |
| 1998 | SMC | Effectiveness of enforcement systems for environmental regulations: comparison of Japanese and North American systems. | Kei Fukuyama |