| 2026 | ICAART | Scalable BDI Logic Inference for Contradictory Knowledge Reasoning. | Hiraku Gondo, Hiroki Sakaji, Itsuki Noda |
| 2026 | ICAART | SHARP: A Complete Multi-Task MAPD Planner for Realistic Warehouse Scenarios. | Taisei Hirayama, Kohei Yoshida, Hiroki Sakaji, Itsuki Noda |
| 2026 | SIGIR | JFinTEB: Japanese Financial Text Embedding Benchmark. | Masahiro Suzuki, Hiroki Sakaji |
| 2025 | PAAMS | Efficient Assignment of Immediate Tasks Using Deep Reinforcement Learning in Multi-Agent Pickup and Delivery. | Taisei Hirayama, Kohei Yoshida, Hiroki Sakaji, Itsuki Noda |
| 2025 | PAAMS | LDAS: Proposal for Semi-optimal Storage Locations Using LDA and SA. | Tatsuto Ito, Naoki Hattori, Hiroki Sakaji, Itsuki Noda |
| 2025 | WWW | Economy Watchers Survey Provides Datasets and Tasks for Japanese Financial Domain. | Masahiro Suzuki, Hiroki Sakaji |
| 2024 | ACL | LLMFactor: Extracting Profitable Factors through Prompts for Explainable Stock Movement Prediction. | Meiyun Wang, Kiyoshi Izumi, Hiroki Sakaji |
| 2022 | KES | Models of Exchanged Datasets and Interactions of Buyers in the Data Market: Toward Multi-Agent Simulators for System Design. | Teruaki Hayashi, Hiroyasu Matsushima, Hiroki Sakaji, Yoshiaki Fukami, Takumi Shimizu |
| 2022 | WWW | Graph Representation Learning of Banking Transaction Network with Edge Weight-Enhanced Attention and Textual Information. | Naoto Minakawa, Kiyoshi Izumi, Hiroki Sakaji, Hitomi Sano |
| 2020 | AAAI | Word-Level Contextual Sentiment Analysis with Interpretability. | Tomoki Ito, Kota Tsubouchi, Hiroki Sakaji, Tatsuo Yamashita, Kiyoshi Izumi |
| 2020 | PRIMA | Implementation of Real Data for Financial Market Simulation Using Clustering, Deep Learning, and Artificial Financial Market. | Masanori Hirano, Hiroyasu Matsushima, Kiyoshi Izumi, Hiroki Sakaji |
| 2020 | SDM | SSNN: Sentiment Shift Neural Network. | Tomoki Ito, Kota Tsubouchi, Hiroki Sakaji, Tatsuo Yamashita, Kiyoshi Izumi |
| 2019 | AINA | Estimation of Tags Using Various Data for Online Videos. | Hiroki Sakaji, Akio Kobayashi, Masaki Kohana, Yasunao Takano, Kiyoshi Izumi |
| 2019 | AINA | Improving Document Similarity Calculation Using Cosine-Similarity Graphs. | Yasunao Takano, Yusuke Iijima, Kou Kobayashi, Hiroshi Sakuta, Hiroki Sakaji, Masaki Kohana, Akio Kobayashi |
| 2019 | AINA | Forecasting Crypto-Asset Price Using Influencer Tweets. | Hirofumi Yamamoto, Hiroki Sakaji, Hiroyasu Matsushima, Yuki Yamashita, Kyohei Osawa, Kiyoshi Izumi, Takashi Shimada |
| 2019 | ICDM | CSNN: Contextual Sentiment Neural Network. | Tomoki Ito, Kota Tsubouchi, Hiroki Sakaji, Kiyoshi Izumi, Tatsuo Yamashita |
| 2019 | ICDM | Causality Existence Classification from Multilingual Texts Using End-to-End LSTM Models. | Yuta Niki, Hiroki Sakaji, Kiyoshi Izumi, Hiroyasu Matsushima |
| 2019 | ICDM | Extraction of Volitional Utterances from Japanese Local Political Corpus. | Hiroki Sakaji, Yasutomo Kimura, Kiyoshi Izumi, Hiroyasu Matsushima |
| 2019 | ICDM | Stock Price Analysis Using Combination of Analyst Reports and Several Documents. | Masahiro Suzuki, Toshiya Katagi, Hiroki Sakaji, Kiyoshi Izumi, Yasushi Ishikawa |
| 2019 | IJCAI | Economic Causal-Chain Search Using Text Mining Technology. | Kiyoshi Izumi, Hiroki Sakaji |
| 2019 | SMC | Chain Bankruptcy Simulation Considering Investment from Banks to Companies. | Ryo Hamawaki, Jun'ichi Ozaki, Kiyoshi Izumi, Takashi Shimada, Hiroki Sakaji, Hiroyasu Matsushima |
| 2018 | AINA | A Parallel Calculation Method on Web Browser for Contents Categorization. | Masaki Kohana, Hiroki Sakaji, Akio Kobayashi, Shusuke Okamoto |
| 2018 | ICDM | Selection of Related Stocks using Financial Text Mining. | Masanori Hirano, Hiroki Sakaji, Shoko Kimura, Kiyoshi Izumi, Hiroyasu Matsushima, Shintaro Nagao, Atsuo Kato |
| 2018 | PAKDD | Text-Visualizing Neural Network Model: Understanding Online Financial Textual Data. | Tomoki Ito, Hiroki Sakaji, Kota Tsubouchi, Kiyoshi Izumi, Tatsuo Yamashita |
| 2017 | AINA | A Distributed Calculation Scheme for Contents Categorization. | Masaki Kohana, Hiroki Sakaji, Akio Kobayashi, Shusuke Okamoto |
| 2017 | ICDM | Development of an Interpretable Neural Network Model for Creation of Polarity Concept Dictionaries. | Tomoki Ito, Hiroki Sakaji, Kiyoshi Izumi, Kota Tsubouchi, Tatsuo Yamashita |
| 2008 | PAKDD | Automatic Extraction of Basis Expressions That Indicate Economic Trends. | Hiroki Sakaji, Hiroyuki Sakai, Shigeru Masuyama |