| 2007 | MDAI | Mining Frequent Diamond Episodes from Event Sequences. | Takashi Katoh, Kouichi Hirata, Masateru Harao |
| 2006 | DIS | Mining Sectorial Episodes from Event Sequences. | Takashi Katoh, Kouichi Hirata, Masateru Harao |
| 2005 | DIS | The | Nobuhito Ohkura, Kouichi Hirata, Tetsuji Kuboyama, Masateru Harao |
| 2005 | FCT | On Finding Acyclic Subhypergraphs. | Kouichi Hirata, Megumi Kuwabara, Masateru Harao |
| 2005 | ICITA | Multi-Agent Based Modeling and Simulation of Consensus Formations in Arguments. | Kosuke Ono, Masateru Harao, Kouichi Hirata |
| 2005 | ICITA | Performance Analysis for Construction of a Performance Practice Support System. | Shogo Ozaki, Masateru Harao, Kouichi Hirata |
| 2005 | PAKDD | Extraction of Frequent Few-Overlapped Monotone DNF Formulas with Depth-First Pruning. | Yoshikazu Shima, Kouichi Hirata, Masateru Harao |
| 2004 | DIS | Extracting Minimal and Closed Monotone DNF Formulas. | Yoshikazu Shima, Shinji Mitsuishi, Kouichi Hirata, Masateru Harao |
| 2004 | ILP | Generalization Algorithms for Second-Order Terms. | Kouichi Hirata, Takeshi Ogawa, Masateru Harao |
| 2003 | DIS | Extraction of Coverings as Monotone DNF Formulas. | Kouichi Hirata, Ryosuke Nagazumi, Masateru Harao |
| 1999 | COCOON | Tractable and Intractable Second-Order Matching Problems. | Kouichi Hirata, Keizo Yamada, Masateru Harao |
| 1998 | JELIA | Higher Order Generalization. | Jianguo Lu, Masateru Harao, Masami Hagiya |
| 1991 | ALT | Proving based on similarity. | Ken-etsu Fujita, Masateru Harao |
| 1990 | ALT | Analogical Reasoning Based on Higher-Order Unification. | Masateru Harao |