Emergence of Peace due to Neutral Attitude Toward Others. - Yutaka Nakai (WCSS, 2006)

Emergence and Collapse of Peace with Friend Selection Strategies. - Yutaka Nakai; Masayoshi Muto (J. Artif. Soc. Soc. Simul., 2008)

Cyclical Pattern of the Rise and Fall of an Online Community Due to a Troll. - Yutaka Nakai (WCSS, 2012)

The evolution of conditional moral assessment in indirect reciprocity. - Tatsuya Sasaki; Isamu Okada; Yutaka Nakai (CoRR, 2016)

Triadic Social Structure Facilitates Backing for Crowdfunding Projects. - Yutaka Nakai; Hiroki Takikawa (IEEE BigData, 2018)