Kohei Kajikawa

Master’s student at the University of Tokyo (UTokyo).

Biography

Hi! I’m Kohei Kajikawa, a master’s student at the University of Tokyo.
My research interests include computational linguistics and computational psycholinguistics.

We effortlessly understand the meaning of a sentence as we see or hear it. I’m interested in how linguistic knowledge, such as grammar, is algorithmically employed during this process (CogSci 2024).
And, I’m curious about why language structures are the way they are. Specifically, I aim to investigate the extent to which communicative efficiency can explain syntactic structures (CoNLL 2024).

文を見たり聞いたりするとすぐにその意味がわかりますが、その際に、無意識下でどのような形の文法がどのようなアルゴリズムで使われているのか関心があります。
また、その文法が、なぜいまある形になっているのかについても気になっており、特に、「使用のしやすさ」の観点からどれだけ説明が可能か調べています。

Interests

Combinatory Categorial Grammar (CCG)
Incremental Sentence Processing
Efficient Communication

Education

Master of Arts, April 2023 - Present

Department of Language and Information Sciences, Graduate School of Arts and Sciences, The University of Tokyo（東京大学大学院総合文化研究科言語情報科学専攻）
Bachelor of Arts, April 2019 - March 2023

Department of Humanities and Social Sciences, College of Arts and Sciences, The University of Tokyo（東京大学教養学部教養学科超域文化科学分科学際言語科学コース）

International Conference

Kohei Kajikawa, Yusuke Kubota, Yohei Oseki (2024). Is Struncure Dependence Shaped for Efficient Communication? A Case Study on Coordination. In Proceedings of the 28th Conference on Computational Natural Language Learning (CoNLL), oral presentation, 🏆Best Paper Award.

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Kohei Kajikawa, Ryo Yoshida, Yohei Oseki (2024). Dissociating Syntactic Operations via Composition Count. In Proceedings of the 46th Annual Meeting of the Cognitive Science Society (CogSci 2024), oral presentation (236/1242 = 19.00%).

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Kohei Kajikawa (2023). Analyzing Japanese Cleft Construction in Combinatory Categorial Grammar. Logic and Engineering of Natural Language Semantics 20 (LENLS20).

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Shinnosuke Isono, Takuya Hasegawa, Kohei Kajikawa, Koichi Kono, Shiho Nakamura, Yohei Oseki (2022). Formalizing argument structures with Combinatory Categorial Grammar. Logic and Engineering of Natural Language Semantics 19 (LENLS19).

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Journal

Shinnosuke Isono, Takuya Hasegawa, Kohei Kajikawa, Koichi Kono, Shiho Nakamura, Yohei Oseki (2023). Formalizing Argument Structures with Combinatory Categorial Grammar. Lecture Notes in Computer Science.

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