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- Makoto Araya, Masaaki Harada, Keita Ishizuka and Yuto Tanaka, Characterizations of the minimum weights of LCD codes of large dimensions, IEEE Transactions on Information Theory 70 (2024), 8758-8769 DOI: 10.1109/TIT.2024.3483218.
- Masaaki Harada, Hadi Kharaghani and Keita Ishizuka, Ternary extremal four-negacirculant self-dual codes, Graphs and Combinatorics 40 (2024), 59 (8 pp.) DOI: 10.1007/s00373-024-02788-3.
- Masaaki Harada and Keita Ishizuka, Hadamard matrices of order 36 formed by codewords in some ternary self-dual codes, Discrete Mathematics 347 (2024), 113661 (10 pp.) DOI: 10.1016/j.disc.2023.113661.
- Keita Ishizuka, Construction of quaternary Hermitian LCD codes, Cryptogr. Commun. 15 (2023), 455-467, DOI: 10.1007/s12095-022-00614-2.
- Keita Ishizuka and Ken Saito, Construction for both self-dual codes and LCD codes, Advances Math. Communications 17 (2023), 139-151, DOI: 10.3934/amc.2021070.
- Keita Ishizuka and Ken Saito, On the existence of quaternary Hermitian LCD codes with Hermitian dual distance 1, Discrete Math. 345 (2022), Paper No. 112702, 3 pp.
- Keita Ishizuka, Classification of optimal quaternary Hermitian LCD codes of dimension 2, J. Algebra Comb. Discrete Struct. Appl. 7 (2020), 229-236.
- Makoto Araya, Masaaki Harada and Ken Saito, On the minimum weights of binary LCD codes and ternary LCD codes, Finite Fields Appl. 76 (2021), Paper No. 101925, 22 pp.
- Makoto Araya, Masaaki Harada and Ken Saito, Characterization and classification of optimal LCD codes, Des. Codes Cryptogr. 89 (2021), 617-640.
- Makoto Araya, Masaaki Harada and Ken Saito, Quaternary Hermitian linear complementary dual codes, IEEE Trans. Inform. Theory 66 (2020), 2751-2759.
- Masaaki Harada and Ken Saito, Remark on subcodes of linear complementary dual codes, Inform. Process. Lett. 159(160) (2020), 105963, 3 pp.
- Masaaki Harada and Ken Saito, Binary linear complementary dual codes, Cryptogr. Commun. 11 (2019), 677-696.
- Ken Saito, Self-dual additive $\mathbb{F}_4$-codes of lengths up to 40 represented by circulant graphs, Adv. Math. Commun. 13 (2019), 213-220.
- Masaaki Harada and Ken Saito, Singly even self-dual codes constructed from Hadamard matrices of order 28, Australas. J. Combin. 70 (2018), 288-296.
- Makoto Araya, Masaaki Harada and Yuichi Suzuki, Ternary maximal self-orthogonal codes of lengths 21, 22 and 23, J. Algebra Comb. Discrete Struct. Appl.5 (2018), 1-4.
- Makoto Araya, Masaaki Harada, Hiroki Ito and Ken Saito, On the classification of $\mathbb{Z}_4$-codes, Adv. Math. Commun. 11 (2017), no. 4, 747-756.
- T. Aaron Gulliver, Masaaki Harada and Hiroki Miyabayashi, Optimal double circulant self-dual codes over $\mathbb{F}_4$. II, Australas. J. Combin. 39 (2007), 163-174.
- Hiroki Miyabayashi, A classification of double circulant Hermitian self-dual codes over $\mathbb{F}_4$ of lengths up to 26, Bull. Yamagata Univ. Natur. Sci. 16 (2007), 81-91.
- T. Aaron Gulliver, Masaaki Harada and Hiroki Miyabayashi, Double circulant and quasi-twisted self-dual codes over $\mathbb{F}_5$ and $\mathbb{F}_7$, Adv. Math. Commun. 1 (2007), 223-238
- Naoyuki Horiguchi, Hiroyuki Nakasora and Takehisa Wakabayashi, On the strongly regular graphs obtained from quasi-symmetric 2-(31,7,7) designs, Bull. Yamagata Univ. Natur. Sci. 16 (2005), 1-6.
- Takehisa Wakabayashi, On the self-dual codes over $\rm GF(7)$ generated by Hadamard matrices of order 28, AKCE Int. J. Graphs Comb. 1 (2004), 41-49.