| 2010 | DCAI | Feature Selection Method for Classification of New and Used Bills. | Sigeru Omatu, Masao Fujimura, Toshihisa Kosaka |
| 2008 | HIS | Fatigue Level Estimation of Bill by Using Supervised SOM Based on Feature-Selected Acoustic Energy Pattern. | Masaru Teranishi, Sigeru Omatu, Toshihisa Kosaka |
| 2007 | ETFA | Bank note classification using neural networks. | Sigeru Omatu, Michifumi Yoshioka, Toshihisa Kosaka |
| 2004 | IJCNN | Improvement of the reliability of bank note classifier machines. | Ali Ahmadi, Sigeru Omatu, Toshihisa Kosaka |
| 2004 | IJCNN | Fire detection systems by compact electronic nose systems using metal oxide gas sensors. | Bancha Charumporn, Sigeru Omatu, Michifumi Yoshioka, Toru Fujinaka, Toshihisa Kosaka |
| 2003 | IJCNN | A reliable method for recognition of paper currency by approach to local PCA. | Ali Ahmadi, Sigeru Omatu, Toshihisa Kosaka |
| 2003 | IJCNN | Classification of the Italian Liras using the LVQ method. | Sigeru Omatu, Toshihisa Kosaka, Masaru Teranisi |
| 2002 | ICANN | Neuro-classification of Bill Fatigue Levels Based on Acoustic Wavelet Components. | Masaru Teranishi, Sigeru Omatu, Toshihisa Kosaka |
| 2001 | SMC | Bill classification by using the LVQ method. | Toshihisa Kosaka, Sigeru Omatu, Toru Fujinaka |
| 2000 | IJCNN | Classification of the Italian Liras Using the LVQ Method. | Toshihisa Kosaka, Sigeru Omatu |
| 2000 | IJCNN | Classification of Bill Fatigue Levels by Feature-Selected Acoustic Energy Pattern Using Competitive Neural Network. | Masaru Teranishi, Sigeru Omatu, Toshihisa Kosaka |
| 2000 | SMC | Classification of the Italian Lira using the LVQ method. | Toshihisa Kosaka, Sigeru Omatu |
| 1999 | IJCNN | New and used bills classification for cepstrum patterns. | Masaru Teranishi, Sigeru Omato, Toshihisa Kosaka |
| 1998 | ICONIP | New and Used Bills Classification Using Competitive Neural Network Based on Cepstrum Pattern. | Masaru Teranishi, Sigeru Omatu, Toshihisa Kosaka |