Atsumoto Ohashi / 大橋厚元

Atsumoto Ohashi / 大橋厚元

PhD student at Nagoya University

About me

I’m currently a PhD student at Nagoya University. I’m working within the Dialogue System Research Group, under the guidance of Prof. Ryuichiro Higashinaka. My research interests lie in task-oriented dialogue systems, reinforcement learning, and natural language processing.

My CV can be found here (PDF).

Education

  • April 2023 – Present
    Ph.D. student in Informatics
    Graduate School of Informatics, Nagoya University

  • April 2021 – March 2023
    Master of Informatics
    Graduate School of Informatics, Nagoya University

  • April 2017 – March 2021
    Bachelor of Informatics
    School of Informatics, Nagoya University

Selected Publications

(* Equal contribution)

International Conferences (Refereed)

  • Atsumoto Ohashi, Ukyo Honda, Tetsuro Morimura and Yuu Jinnai. “On the True Distribution Approximation of Minimum Bayes-Risk Decoding,” The 2024 Annual Conference of the North American Chapter of the Association for Computational Linguistics (NAACL), 2024 [Paper] [Code]
  • Atsumoto Ohashi*, Ryu Hirai*, Shinya Iizuka, Ryuichiro Higashinaka. “JMultiWOZ: A Large-Scale Japanese Multi-Domain Task-Oriented Dialogue Dataset,” The 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING), 2024 [Paper] [Code]
  • Atsumoto Ohashi and Ryuichiro Higashinaka. “Enhancing Task-oriented Dialogue Systems with Generative Post-processing Networks,” The 2023 Conference on Empirical Methods in Natural Language Processing (EMNLP), 2023 [Paper] [Code]
  • Ao Guo, Atsumoto Ohashi, Yuya Chiba, Yuiko Tsunomori, Ryu Hirai and Ryuichiro Higashinaka. “Personality-aware Natural Language Generation for Task-oriented Dialogue using Reinforcement Learning,” The 32nd IEEE International Conference on Robot and Human Interactive Communication (RO-MAN), 2023 [Paper]
  • Atsumoto Ohashi and Ryuichiro Higashinaka. “Adaptive Natural Language Generation for Task-oriented Dialogue via Reinforcement Learning,” The 29th International Conference on Computational Linguistics (COLING), 2022 [Paper] [Code] [Blog (in Japanese)]
  • Atsumoto Ohashi and Ryuichiro Higashinaka. “Post-processing Networks: A Method for Optimizing Pipeline Task-oriented Dialogue Systems using Reinforcement Learning,” The 23rd Annual Meeting of the Special Interest Group on Discourse and Dialogue (SIGDIAL), 2022 [Paper] [Code] [Oral] [Blog (in Japanese)]
  • Ao Guo, Atsumoto Ohashi, Ryu Hirai, Yuya Chiba, Yuiko Tsunomori and Ryuichiro Higashinaka. “Influence of user personality on dialogue task performance: A case study using a rule-based dialogue system,” The 3rd Workshop on Natural Language Processing for Conversational AI (NLP4ConvAI), 2021 [Paper] [Oral]

Non-refereed

  • 大橋厚元*, 平井龍*, 飯塚慎也, 東中竜一郎. “JMultiWOZ: 日本語タスク指向型対話データセットの構築,” 言語処理学会 第29回年次大会 (NLP), 2023 [Paper] [若手奨励賞]
  • Ryu Hirai*, Atsumoto Ohashi*, Ao Guo, Hideki Shiroma, Xulin Zhou, Yukihiko Tone, Shinya Iizuka, Ryuichiro Higashinaka. “Team Flow at DRC2022: Pipeline System for Travel Destination Recommendation Task in Spoken Dialogue,” Dialogue Robot Competition 2022 [Paper]
  • 大橋厚元, 東中竜一郎. “後処理ネットワークを用いた強化学習によるタスク指向型対話システムの最適化,” 言語処理学会 第28回年次大会 (NLP), 2022 [Paper] [スポンサー賞（サイバーエージェント賞）, 委員特別賞]
  • 大橋厚元, 東中竜一郎. “強化学習を用いたモジュール連動に基づくタスク指向型対話システムの検討,” 2021年度 人工知能学会全国大会 (JSAI), 2021 [Paper]

Honors and Awards

  • Young Researcher Encouragement Award (18/406)
    The 29th Annual Meeting of the Association of Natural Language Processing (NLP), 2023
  • Sponsorship Award (5/386)
    The 28th Annual Meeting of the Association of Natural Language Processing (NLP), 2022
  • Committee Special Award (16/365)
    The 28th Annual Meeting of the Association of Natural Language Processing (NLP), 2022
  • Outstanding Academic Achievement
    Department of Computer Science, Nagoya University, 2018
  • Chinese Speech Contest 4th prize
    Nanjing University Cup, 2017

Invited Talks

  • 国際会議参加報告 EMNLP 2023, 第99回 人工知能学会 言語・音声理解と対話処理研究会 (SLUD) 「第14回対話システムシンポジウム」, 2023 [Slide]
  • 国際会議参加報告 SIGDIAL2022/YRRSDS2022, 第96回 人工知能学会 言語・音声理解と対話処理研究会 (SLUD) 「第13回対話システムシンポジウム」, 2022 [Slide]

Scholarships and Grants

  • Nagoya University Interdisciplinary Frontier Fellowship [Link]
    April 2023 – March 2026
    • Research scholarship: 180,000 yen / month
    • Research Expenses: 250,000 yen / year

Experience

  • Research Intern at CyberAgent, Inc.
    August 2023 – September 2023

  • Teaching Assistant for Intelligent Interface 2, Nagoya University
    June 2022 – August 2022

  • Short-term Study Abroad at Nanjing University, China
    February 2018 – March 2018