| 2011 | CHES | Piccolo: An Ultra-Lightweight Blockcipher. | Kyoji Shibutani, Takanori Isobe, Harunaga Hiwatari, Atsushi Mitsuda, Toru Akishita, Taizo Shirai |
| 2011 | CRYPTO | Public-Key Identification Schemes Based on Multivariate Quadratic Polynomials. | Koichi Sakumoto, Taizo Shirai, Harunaga Hiwatari |
| 2011 | PQCrypto | On Provable Security of UOV and HFE Signature Schemes against Chosen-Message Attack. | Koichi Sakumoto, Taizo Shirai, Harunaga Hiwatari |
| 2007 | FSE | The 128-Bit Blockcipher CLEFIA (Extended Abstract). | Taizo Shirai, Kyoji Shibutani, Toru Akishita, Shiho Moriai, Tetsu Iwata |
| 2006 | FSE | On Feistel Structures Using a Diffusion Switching Mechanism. | Taizo Shirai, Kyoji Shibutani |
| 2004 | ASIACRYPT | On Feistel Ciphers Using Optimal Diffusion Mappings Across Multiple Rounds. | Taizo Shirai, Bart Preneel |
| 2004 | FSE | Improving Immunity of Feistel Ciphers against Differential Cryptanalysis by Using Multiple MDS Matrices. | Taizo Shirai, Kyoji Shibutani |
| 2002 | FSE | Improved Upper Bounds of Differential and Linear Characteristic Probability for Camellia. | Taizo Shirai, Shoji Kanamaru, George Abe |