| 2020 | SMC | Maintaining Population Diversity in Deterministic Geometric Semantic Genetic Programming by ϵ-Lexicase Selection. | Akira Hara, Jun-ichi Kushida, Tetsuyuki Takahama |
| 2019 | GECCO | L-SHADE with an adaptive penalty method of balancing the objective value and the constraint violation. | Takeshi Kawachi, Jun-ichi Kushida, Akira Hara, Tetsuyuki Takahama |
| 2019 | SMC | Time Series Prediction Using Deterministic Geometric Semantic Genetic Programming. | Akira Hara, Jun-ichi Kushida, Tetsuyuki Takahama |
| 2018 | SMC | Artificial Bee Colony Programming Using Semantic Control Crossover. | Akira Hara, Jun-ichi Kushida, Ryota Takemoto, Tetsuyuki Takahama |
| 2018 | SMC | Cartesian Genetic Programming with Module Mutation for Symbolic Regression. | Jun-ichi Kushida, Akira Hara, Tetsuyuki Takahama |
| 2017 | SMC | The influence of generation alternation model on search performance in deterministic geometric semantic genetic programming. | Akira Hara, Jun-ichi Kushida, Takamichi Yamagata, Tetsuyuki Takahama |
| 2016 | SMC | Deterministic Geometric Semantic Genetic Programming with Optimal Mate Selection. | Akira Hara, Jun-ichi Kushida, Tetsuyuki Takahama |
| 2015 | CEC | Rank-based differential evolution with multiple mutation strategies for large scale global optimization. | Jun-ichi Kushida, Akira Hara, Tetsuyuki Takahama |
| 2015 | SMC | Genetic Programming Using the Best Individuals of Genealogies for Maintaining Population Diversity. | Akira Hara, Takuya Mototsuka, Jun-ichi Kushida, Tetsuyuki Takahama |
| 2014 | SMC | Rank-based Semantic Control Crossover in Genetic Programming. | Akira Hara, Jun-ichi Kushida, Takeyuki Nobuta, Tetsuyuki Takahama |
| 2014 | SMC | Emergence of altruism behavior for multi feeding areas in army ant social evolutionary system. | Takumi Ichimura, Takuya Uemoto, Akira Hara |
| 2013 | SMC | Neuroevolution by Particle Swarm Optimization with Adaptive Input Selection for Controlling Platform-Game Agent. | Akira Hara, Jun-ichi Kushida, Koji Kitao, Tetsuyuki Takahama |
| 2012 | SMC | New crossover operator based on semantic distance between subtrees in Genetic Programming. | Akira Hara, Yoshimasa Ueno, Tetsuyuki Takahama |
| 2011 | SMC | Cartesian Ant Programming. | Akira Hara, Manabu Watanabe, Tetsuyuki Takahama |
| 2011 | RO-MAN | EEG analysis for acoustic quality evaluation using PCA and FDA. | Masaki Nakanishi, Yasue Mitsukura, Akira Hara |
| 2010 | CEC | Ant Colony Optimization using exploratory ants for constructing partial solutions. | Akira Hara, Syuhei Matsushima, Takumi Ichimura, Tetsuyuki Takahama |
| 2009 | SMC | Human Communication Network Based on the Classification Results of Personal Preferences by Using Self-Organizing Map. | Takumi Ichimura, Azusa Yamasaki, Akira Hara, Tetsuyuki Takahama |
| 2007 | CEC | Species-based differential evolution with switching search strategies for multimodal function optimization. | Miyuki Shibasaka, Akira Hara, Takumi Ichimura, Tetsuyuki Takahama |
| 2007 | CEC | Structural learning of neural networks by differential evolution with degeneration using mappings. | Tetsuyuki Takahama, Setsuko Sakai, Akira Hara, Noriyuki Iwane |
| 2007 | KES | Reconsideration of the Effectiveness on Extracting Computer Diagnostic Rules by Automatically Defined Groups. | Yoshiaki Kurosawa, Akira Hara, Kazuya Mera, Takumi Ichimura |
| 2007 | SMC | A classification method for spam e-mail by Self-Organizing Map and automatically defined groups. | Takumi Ichimura, Akira Hara, Yoshiaki Kurosawa |
| 2006 | CEC | Effective Diversification of Ant-Based Search Using Colony Fission and Extinction. | Akira Hara, Takumi Ichimura, Nobuyuki Fujita, Tetsuyuki Takahama |
| 2006 | SMC | A Proposal of Interactive Genetic Network Programming by Fuzzy Structural Modeling. | Takumi Ichimura, Kazuya Sakaguchi, Akira Hara, Tetsuyuki Takahama |
| 2006 | SMC | Extraction of Error Detection Rules without Supervised Information from Log Files Using Automatically Defined Groups. | Yoshiaki Kurosawa, Akira Hara, Takumi Ichimura, Yuji Kawano |
| 2005 | KES | Extraction of Risk Factors by Multi-agent Voting Model Using Automatically Defined Groups. | Akira Hara, Takumi Ichimura, Tetsuyuki Takahama, Yoshinori Isomichi |
| 2005 | KES | Effect of Direct Communication in Ant System. | Akira Hara, Takumi Ichimura, Tetsuyuki Takahama, Yoshinori Isomichi, Motoki Shigemi |
| 2005 | KES | Multi-agent Cluster System for Optimal Performance in Heterogeneous Computer Environments. | Toshihiro Ikeda, Akira Hara, Takumi Ichimura, Tetsuyuki Takahama, Yuko Taniguchi, Hiroshige Yamada, Ryota Hakozaki, Haruo Sakuda |
| 2005 | KES | Preprocessing for Extracting Information from Medical Record to Add XML Tags. | Yoshiaki Kurosawa, Akira Hara, Machi Suka, Takumi Ichimura |
| 2004 | KES | Extraction of Rules from Coronary Heart Disease Database Using Automatically Defined Groups. | Akira Hara, Takumi Ichimura, Tetsuyuki Takahama, Yoshinori Isomichi |
| 2003 | KES | Extraction of Rules by Heterogeneous Agents Using Automatically Defined Groups. | Akira Hara, Takumi Ichimura, Tetsuyuki Takahama, Yoshinori Isomichi |
| 2003 | KES | Multi-objective Decision Making by AHP and Its Application to Personal Preference Retrieval System. | Takumi Ichimura, Akira Hara, Tetsuyuki Takahama, Yoshinori Isomichi, Rie Utsunomiya |
| 1999 | GECCO | Emergence of the cooperative behavior using ADG; Automatically Defined Groups. | Akira Hara, Tomoharu Nagao |