| 2013 | HCI | Designing of Face Image Processing Technique for Sorting Out Japanese Raccoons Form Raccoons. | Tadasuke Furuya, Yayoi Kaneko, Hiroaki Ishii, Takafumi Saito |
| 2013 | KES | Fuzzy Multiple Criteria Decision Making Approach to Assess the Project Quality Management in Project. | Yao-Feng Chang, Hiroaki Ishii |
| 2013 | KES | Mathematical Ranking Method for Emergency Facility Location Problem with Block-wisely Different Accident Occurrence Probabilities. | Hiroaki Ishii, Yung Lung Lee |
| 2009 | EUSFLAT | A Type-2 Fuzzy Portfolio Selection Problem Considering Possibility Measure and Crisp Possibilistic Mean Value. | Takashi Hasuike, Hiroaki Ishii |
| 2009 | MDAI | Stochastic Facility Construction Problem with Preference of Candidate Sites. | Hiroaki Ishii, Yung Lung Lee, Kuang Yih Yeh |
| 2009 | SMC | Multiobjective Random Fuzzy Portfolio Selection Problems based on CAPM. | Takashi Hasuike, Hideki Katagiri, Hiroaki Ishii |
| 2008 | ISDA | Database-Driven Disease Prevention by Daily Menu Management and Physical Condition. | Eri Domoto, Koji Okuhara, Hiroaki Ishii |
| 2008 | ISDA | Facility Location Problem under Fuzzy Construction Cost and Preference of Candidate Sites. | Hiroaki Ishii, Yung Lung Lee |
| 2008 | ISDA | Earthquake Shelter Location Evaluation Considering Road Structure. | Yung Lung Lee, Hiroaki Ishii, Cheng-An Tai |
| 2008 | ISDA | The Innovation of Manufacturing Premise Based on Knowledge Obtained by Quality Accident Report. | Shujiro Murayama, Junko Shibata, Koji Okuhara, Hiroaki Ishii |
| 2008 | ISDA | Data Mining of Geographical Accessibility for Tourism in Regional Area. | Koji Okuhara, Kuang Yih Yeh, Hao-Ching Hsia, Hiroaki Ishii |
| 2008 | ISDA | The Self-Organizing Map Applying the "Survival of the Fittest Type" Learning Algorithm. | Junko Shibata, Koji Okuhara, Shogo Shiode, Hiroaki Ishii |
| 2008 | SMC | A random fuzzy programming models based on possibilistic programming. | Hideki Katagiri, Takashi Hasuike, Hiroaki Ishii |
| 2008 | SMC | SIRMs connected fuzzy inference method using kernel method. | Hirosato Seki, Fuhito Mizuguchi, Satoshi Watanabe, Hiroaki Ishii, Masaharu Mizumoto |
| 2007 | IFSA | Portfolio Selection Problem Based on Possibility Theory Using the Scenario Model with Ambiguous Future Returns. | Takashi Hasuike, Hiroaki Ishii |
| 2007 | SMC | On the monotonicity of SIRMs connected type fuzzy reasoning method and SIC reasoning method. | Hirosato Seki, Hiroaki Ishii, Masaharu Mizumoto |
| 2001 | SMC | L-fuzzy optimization problems by parametric representation. | Seiji Saito, Hiroaki Ishii |
| 1998 | KES | Spanning tree problem on a fuzzy network. | Fumihiko Shimada, Hiroaki Ishii, Takeshi Itoh |