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J-GLOBAL ID：201501074215806080   Update date: Apr. 14, 2024

Sakaji Hiroki

サカジ ヒロキ | Sakaji Hiroki
Affiliation and department：
Hokkaido University Faculty of Information Science and Technology

About Hokkaido University Faculty of Information Science and Technology


Job title： Associate Professor
Homepage URL  (1)： https://www.tetsuwaka.net
Research field  (1)： Intelligent informatics
Research keywords  (3)： Information Extraction ,  Text Mining ,  Natural Language Processing
Research theme for competitive and other funds  (8)：
  • 2023 - 2026 AI農業社会実装プロジェクト
  • 2022 - 2026 Economic Narrative Simulation Using Causal Information
  • 2021 - 2024 経済シナリオ分析のための因果関係インスタンス認識技術の確立
  • 2020 - 2024 System Design and Dynamics of Data Exchange Market
  • 2023 - 2024 データ取引の市場設計:被験者実験による研究
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Papers (115)：
  • Hajime Sasaki, Motomasa Fujii, Hiroki Sakaji, Shigeru Masuyama. Enhancing risk analysis with GNN: Edge classification in risk causality from securities reports. International Journal of Information Management Data Insights. 2024. 4. 1. 100217-100217
  • Takeshi Sakumoto, Teruaki Hayashi, Hiroki Sakaji, Hirofumi Nonaka. Metadata-based Clustering and Selection of Metadata Items for Similar Dataset Discovery and Data Combination Tasks. IEEE Access. 2024. 1-1
  • Hiroki Sakaji, Noriyasu Kaneda. Indexing and Visualization of Climate Change Narratives Using BERT and Causal Extraction. 2023 IEEE International Conference on Big Data (BigData). 2023. 5674-5683
  • Masahiro Suzuki, Masanori Hirano, Hiroki Sakaji. From Base to Conversational: Japanese Instruction Dataset and Tuning Large Language Models. 2023 IEEE International Conference on Big Data (BigData). 2023
  • Meiyun Wang, Hiroki Sakaji, Hiroaki Higashitani, Mitsuhiro Iwadare, Kiyoshi Izumi. Discovering new applications: Cross-domain exploration of patent documents using causal extraction and similarity analysis. World Patent Information. 2023. 75
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MISC (120)：
  • SASHIDA Masaki. Extraction SDGs-related sentences from Sustainability Reports using BERT and ChatGPT. JSAI Technical Report, Type 2 SIG. 2023. 2023. FIN-031. 55-60
  • UEDA Tsubasa, IZUMI Kiyoshi, SAKAJI Hiroki. Automotive Supply Chains Turbulence Index with Foot Traffic Data. JSAI Technical Report, Type 2 SIG. 2023. 2023. FIN-030. 40-44
  • Rei Taguchi, Hikaru Watanabe, Hiroki Sakaji, Kiyoshi Izumi, Kenji Hiramatsu. Proposal for Turning Point Detection Method Using Financial Text and Transformer. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). 2023. 13859 LNAI. 171-181
  • WANG Meiyun, SAKAJI Hiroki, HIGASHITANI Hiroaki, IWADARE Mitsuhiro, IZUMI Kiyoshi. New Intellectual Property Management Method Aiming at Expanding Technology Applications and Secondary Development. Proceedings of the Annual Conference of JSAI. 2023. JSAI2023. 2N1GS1004-2N1GS1004
  • SUZUKI Masahiro, SAKAJI Hiroki, IZUMI Kiyoshi. Proposing task to extract differences from time series financial documents. Proceedings of the Annual Conference of JSAI. 2023. JSAI2023. 1E3GS602-1E3GS602
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Patents (2)：
  • 情報処理装置、情報処理方法、およびプログラム
  • 抽出システムおよびプログラム
Books (3)：
  • Pythonによる金融テキストマイニング
    朝倉書店 2022 ISBN:9784254275889
  • Pythonではじめるテキストアナリティクス入門
    講談社 2022 ISBN:9784065274101
  • 金融・経済分析のためのテキストマイニング
    岩波書店 2021 ISBN:9784000299015
Lectures and oral presentations  (11)：
  • テキストマイニングを用いた地方景況感の分析
    (第54回サイバーワールド(CW)研究会 2023)
  • 経済因果チェーンの構築とその応用
    (Workshop on Microeconomic Analysis of Social Systems and Institutions: Theory, Experiment, and Empirical Studies 2023)
  • BERTと因果抽出を用いた気候変動ナラティブの可視化/指数化
    (日本銀行金融研究所ファイナンス・ワークショップ 2022)
  • Economic Causal-Chain Search using Text Mining Technology
    (Knowledge Graphs in Finance and Economics, AKBC Conference 2022 Workshop 2022)
  • 決算短信定性的情報の活用方法・分析ポイントについて~決算短信への期待~
    (決算短信からのデータ抽出に関するハンズオン「JPX総研(日本取引所グループ)/AWS共催」 2022)
ｍore...
Works (1)：
  • Causal Extraction
    Hiroki Sakaji
Education (3)：
  • 2009 - 2012 Toyohashi University of Technology Graduate School of Engineering
  • 2007 - 2009 Toyohashi University of Technology Graduate School of Engineering
  • 2003 - 2007 Toyohashi University of Technology Faculty of Engineering
Professional career (1)：
  • Doctor of Engineering (Toyohashi University of Technology)
Work history (4)：
  • 2023/11 - 現在 Hokkaido University Faculty of Information Science and Technology Associate Professor
  • 2018/04 - 2023/10 The University of Tokyo Department of Systems Innovation, School of Engineering, The University of Tokyo Project Lecturer
  • 2017/04 - 2018/03 The University of Tokyo Department of Systems Innovation, School of Engineering, The University of Tokyo Assistant Professor
  • 2013/09 - 2017/03 Seikei University Department of Computer and Information Science Assistant Professor
Committee career (34)：
  • 2023 - 現在 Special Session on Applied Informatics in Finance and Economics (AIFE) Organizer
  • 2023 - 現在 IEEE Computational Finance and Economics Technical Committee Member
  • 2023 - 現在 人工知能学会 第二種研究会 データ指向構成マイニングとシミュレーション研究会 (DOCMAS) 幹事
  • 2023 - 現在 情報処理学会 編集委員会「知能グループ」 編集委員
  • 2023 - 現在 言語処理学会 会誌編集委員会 編集委員
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Awards (10)：
  • 2023/07 - 14th IIAI International Congress on Advanced Applied Informatics Competitive Paper Award Policy Gradient Stock GAN for Realistic Discrete Order Data Generation in Financial Markets
  • 2022/07 - 10th International Congress on Advanced Applied Informatics Outstanding Paper Award Investment Strategy via Lead Lag Effect using Economic Causal Chain and SSESTM Model
  • 2022/05 - The 2nd Workshop on Financial Technology on the Web Best Paper Award Graph Representation Learning of Banking TransactionNetwork with Edge Weight-Enhanced Attention and Textual Information
  • 2022 - Japanese Society for Artificial Intelligence JSAI Incentive Award
  • 2020 - Japanese Society for Artificial Intelligence JSAI Annual Conference Award STBM+: Advanced Stochastic Trading Behavior Model for Financial Markets based on Residual Blocks or Transformers
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Association Membership(s) (6)：
IEEE ,  THE JAPANESE SOCIETY FOR ARTIFICIAL INTELLIGENCE ,  THE ASSOCIATION FOR NATURAL LANGUAGE PROCESSING ,  THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS ,  INFORMATION PROCESSING SOCIETY OF JAPAN ,  ACL
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