| 2014 | COMMA | Asynchronous Argumentation System PIRIKA for Anyone, Anytime, Anywhere, with the Balanced Semantics. | Yutaka Oomidou, Yuki Katsura, Hajime Sawamura, Jacques Riche, Takeshi Hagiwara |
| 2014 | COMMA | Balanced Semantics for Argumentation based on Heider's Socio-Psychological Balance Theory. | Hajime Sawamura, Jacques Riche, Yutaka Oomidou, Takeshi Hagiwara |
| 2014 | ICAART | Asynchronous Argumentation with Pervasive Personal Communication Tools. | Yuki Katsura, Hajime Sawamura, Takeshi Hagiwara, Jacques Riche |
| 2013 | ICAART | The State of the Art in the Development of a Versatile Argumentation System based on the Logic of Multiple-valued Argumentation. | Satoru Tannai, Shogo Ohta, Takeshi Hagiwara, Hajime Sawamura, Jacques Riche |
| 2013 | PRIMA | Non-standard Uses of PIRIKA: Pilot of the Right Knowledge and Argument. | Yutaka Oomidou, Hajime Sawamura, Takeshi Hagiwara, Jacques Riche |
| 2011 | HIS | A versatile argumentation system based on the Logic of Multiple-valued Argumentation. | Satoru Tannai, Yoshiaki Goto, Yoshifumi Maruyama, Takuto Itoya, Takeshi Hagiwara, Hajime Sawamura |
| 2011 | IJCCI | Neural Networks Computing the Dungean Semantics of Argumentation. | Yoshiaki Goto, Takeshi Hagiwara, Hajime Sawamura |