| 2026 | ISIT | Generalized Capocelli Code of Positive Integers. | Hirosuke Yamamoto, Ken-ichi Iwata |
| 2025 | ISIT | A Lower Bound of Worst-Case Redundancy of $k$-Symbol Delay Decodable Codes. | Kengo Hashimoto, Ken-ichi Iwata |
| 2025 | ISIT | Extensions of Asymmetric Binary Systems and Rayleigh's Theorem. | Ken-ichi Iwata, Kengo Hashimoto, Hirosuke Yamamoto |
| 2024 | ISIT | AIFV Codes Allowing 2-bit Decoding Delays for Unequal Bit Cost. | Ken-ichi Iwata, Kengo Hashimoto, Takahiro Wakayama, Hirosuke Yamamoto |
| 2024 | ISIT | An Asymmetric Encoding - Decoding Scheme for Lossless Data Compression. | Hirosuke Yamamoto, Ken-ichi Iwata |
| 2024 | ISITA | Asymptotic Optimality of the Asymmetric Encoding-Decoding Scheme. | Hirosuke Yamamoto, Ken-ichi Iwata |
| 2022 | ISIT | Joint Coding for Discrete Sources and Finite-State Noiseless Channels. | Ken-ichi Iwata, Hirosuke Yamamoto |
| 2022 | ISITA | Enumeration and Coding of Binary AIFV-m Code Trees. | Genta Onishi, Kengo Hashimoto, Ken-ichi Iwata, Hirosuke Yamamoto |
| 2021 | ISIT | On the Optimality of Binary AIFV Codes with Two Code Trees. | Kengo Hashimoto, Ken-ichi Iwata |
| 2021 | ISIT | AIVF Codes Based on Iterative Algorithm and Dynamic Programming. | Ken-ichi Iwata, Hirosuke Yamamoto |
| 2020 | ISIT | On a Redundancy of AIFV-m Codes for m =3, 5. | Ryusei Fujita, Ken-ichi Iwata, Hirosuke Yamamoto |
| 2020 | ISIT | A Universal Data Compression Scheme based on the AIVF Coding Techniques. | Hirosuke Yamamoto, Koki Imaeda, Kengo Hashimoto, Ken-ichi Iwata |
| 2020 | ITW | An Algorithm for Constructing the Optimal Code Trees for Binary Alphabetic AIFV-m Codes. | Ken-ichi Iwata, Hirosuke Yamamoto |
| 2019 | ISIT | An Iterative Algorithm to Optimize the Average Performance of Markov Chains with Finite States. | Ryusei Fujita, Ken-ichi Iwata, Hirosuke Yamamoto |
| 2019 | ISIT | Enumeration and Coding of Compact Code Trees for Binary AIFV Codes. | Kengo Hashimoto, Ken-ichi Iwata, Hirosuke Yamamoto |
| 2019 | ISIT | Countably Infinite Multilevel Source Polarization for Non-Stationary Erasure Distributions. | Yuta Sakai, Ken-ichi Iwata, Hiroshi Fujisaki |
| 2018 | ISIT | An Optimality Proof of the Iterative Algorithm for AIFV-m Codes. | Ryusei Fujita, Ken-ichi Iwata, Hirosuke Yamamoto |
| 2018 | ISIT | Dynamic Programming Approach of Optimal Upgradation Algorithm for an Auxiliary Random Variable of a Bernoulli Random Variable. | Yuta Sakai, Ken-ichi Iwata |
| 2018 | ISIT | Asymptotic Distribution of Multilevel Channel Polarization for a Certain Class of Erasure Channels. | Yuta Sakai, Ken-ichi Iwata, Hiroshi Fujisaki |
| 2017 | ISIT | Optimal quantization of B-DMCs maximizing α-mutual information with monge property. | Yuta Sakai, Ken-ichi Iwata |
| 2017 | ISIT | Sharp bounds on Arimoto's conditional Rnyi entropies between two distinct orders. | Yuta Sakai, Ken-ichi Iwata |
| 2017 | ITW | An iterative algorithm to construct optimal binary AIFV-m codes. | Hirosuke Yamamoto, Ken-ichi Iwata |
| 2016 | ISIT | Relations between conditional Shannon entropy and expectation of ℓα-norm. | Yuta Sakai, Ken-ichi Iwata |
| 2016 | ISITA | A dynamic programming algorithm to construct optimal code trees of AIFV codes. | Ken-ichi Iwata, Hirosuke Yamamoto |
| 2016 | ISITA | Extremal relations between shannon entropy and ℓα-norm. | Yuta Sakai, Ken-ichi Iwata |
| 2016 | ITW | A generalized erasure channel in the sense of polarization for binary erasure channels. | Yuta Sakai, Ken-ichi Iwata |
| 2015 | DCC | Lossless Data Compression via Substring Enumeration for k-th Order Markov Sources with a Finite Alphabet. | Ken-ichi Iwata, Mitsuharu Arimura |
| 2015 | ISIT | Feasible regions of symmetric capacity and Gallager's E0 function for ternary-input discrete memoryless channels. | Yuta Sakai, Ken-ichi Iwata |
| 2014 | ISIT | Quantizer design for outputs of binary-input discrete memoryless channels using SMAWK algorithm. | Ken-ichi Iwata, Shin-ya Ozawa |
| 2014 | ISITA | Suboptimal quantizer design for outputs of discrete memoryless channels with a finite-input alphabet. | Yuta Sakai, Ken-ichi Iwata |
| 2012 | ISITA | On variable-to-fixed length coding of a general source with infinite alphabet. | Mitsuharu Arimura, Ken-ichi Iwata |
| 2012 | ISITA | On the maximum redundancy of CSE for I.I.D. sources. | Ken-ichi Iwata, Mitsuharu Arimura, Yuki Shima |
| 2011 | ISIT | Coding theorems on the worst-case redundancy of fixed-length coding for a general source. | Hiroki Koga, Mitsuharu Arimura, Ken-ichi Iwata |
| 2010 | ISIT | On the achievable redundancy rate of fixed length source code for general sources. | Mitsuharu Arimura, Ken-ichi Iwata |
| 2010 | ISITA | The minimum achievable redundancy rate of fixed-to-fixed length source codes for general sources. | Mitsuharu Arimura, Ken-ichi Iwata |
| 2010 | ISITA | A prefix-free coding for finite-state noiseless channels with small coding delay. | Ken-ichi Iwata, Takuya Koyama |
| 2005 | DCC | A New Approach of DCA by using BWT. | Bo Zhao, Ken-ichi Iwata, Shuichi Itoh, Toshihiko Kato |
| 2005 | ICASSP | State-space digital filters with minimum L | Takao Hinamoto, Ken-ichi Iwata, Wu-Sheng Lu |
| 2005 | ISCAS | Minimization of L | Takao Hinamoto, Ken-ichi Iwata, Wu-Sheng Lu |
| 2005 | ISIT | On multiple-access communication system for general correlated sources with an array of general independent channels. | Ken-ichi Iwata |