| 2018 | ICTAC | The Smallest FSSP Partial Solutions for One-Dimensional Ring Cellular Automata: Symmetric and Asymmetric Synchronizers. | Hiroshi Umeo, Naoki Kamikawa, Gen Fujita |
| 2017 | ICTAC | Smaller-State Implementations of 2D FSSP Algorithms - Recent Developments. | Hiroshi Umeo, Keisuke Kubo, Akira Nomura |
| 2017 | PACT | A New Class of the Smallest Four-State Partial FSSP Solutions for One-Dimensional Ring Cellular Automata. | Hiroshi Umeo, Naoki Kamikawa |
| 2015 | PACT | A Class of Non-optimum-time 3n-Step FSSP Algorithms - A Survey. | Hiroshi Umeo, Masashi Maeda, Akihiro Sousa, Kiyohisa Taguchi |
| 2013 | PACT | An Isotropic Optimum-Time FSSP Algorithm for Two-Dimensional Cellular Automata. | Hiroshi Umeo, Keisuke Kubo, Yusuke Takahashi |
| 2012 | AINA | Realizing Global Synchronizations for Locally-Connected Two-Dimensional Rectangle Cellular Arrays. | Hiroshi Umeo |
| 2012 | HPSC | FSSP Algorithms for Square and Rectangular Arrays. | Hiroshi Umeo |
| 2011 | CiE | A New Optimum-Time Firing Squad Synchronization Algorithm for Two-Dimensional Rectangle Arrays: One-Sided Recursive Halving Based. | Hiroshi Umeo, Kinuo Nishide, Takuya Yamawaki |
| 2011 | PACT | Smallest Implementations of Optimum-Time Firing Squad Synchronization Algorithms for One-Bit-Communication Cellular Automata. | Hiroshi Umeo, Takashi Yanagihara |
| 2008 | PDPTA | A Note on Sequence Generation Power of Communication-Restricted Cellular Automata with Small Number of States. | Naoki Kamikawa, Hiroshi Umeo |
| 2007 | MCU | A Smallest Five-State Solution to the Firing Squad Synchronization Problem. | Hiroshi Umeo, Takashi Yanagihara |
| 2005 | UC | A Twelve-State Optimum-Time Synchronization Algorithm for Two-Dimensional Rectangular Cellular Arrays. | Hiroshi Umeo, Masaya Hisaoka, Shunsuke Akiguchi |
| 2004 | MCU | Several New Generalized Linear- and Optimum-Time Synchronization Algorithms for Two-Dimensional Rectangular Arrays. | Hiroshi Umeo, Masaya Hisaoka, Masato Teraoka, Masashi Maeda |
| 2003 | HPSC | Efficient 1-Bit-Communication Cellular Algorithms. | Hiroshi Umeo, Koshi Michisaka, Naoki Kamikawa, Yuichi Kinugasa |
| 2003 | ICCS | A Synchronization Problem on 1-Bit Communication Cellular Automata. | Hiroshi Umeo, Koshi Michisaka, Naoki Kamikawa |
| 2003 | ISPA | A Comparative Investigation into Optimum-Time Synchronization Protocols for a Large Scale of One-Dimensional Cellular Automata. | Hiroshi Umeo, Masaya Hisaoka, Takashi Sogabe |
| 2002 | DLT | An Infinite Prime Sequence Can Be Generated in Real-Time by a 1-Bit Inter-cell Communication Cellular Automaton. | Hiroshi Umeo, Naoki Kamikawa |
| 1998 | MCU | A deisgn of cellular algorithms for 1-bit inter-call communications and related cellular algorithms. | Hiroshi Umeo |
| 1987 | ARITH | A design of time-optimum and register-number-minimum systolic convolver. | Hiroshi Umeo |