People
Kota Tsubouchi Senior Chief Researcher, LY Research
Graduated from the Faculty of Engineering at the University of Tokyo in 2005 and completed a doctorate at the Graduate School of Frontier Sciences at the University of Tokyo in 2010. In the same year, he became a project researcher at the University of Tokyo. From 2012, he has been a senior researcher at Yahoo! JAPAN Research Labs. He is engaged in research and development of data analysis and machine learning focusing on human activity logs (location data, search logs, shopping history, sensor data, etc.). PhD (Environmental Studies).
Publications
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- JOURNAL (INTERNATIONAL)
- YJMob100K: City-scale and longitudinal dataset of anonymized human mobility trajectories
- Takahiro Yabe (New York University), Kota Tsubouchi, Toru Shimizu, Yoshihide Sekimoto (The University of Tokyo), Kaoru Sezaki (The University of Tokyo), Esteban Moro (Massachusetts Institute of Technology), Alex Pentland (Massachusetts Institute of Technology)
- Scientific Data
- April 23, 2024
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- CONFERENCE (INTERNATIONAL)
- Camera-Based Position Estimation using Frequency-Multiplexed Luminance Gradient
- Shota Shimada, Hiroaki Murakami (the University of Tokyo), Kota Tsubouchi, Takuya Sasatani (the University of Tokyo), Yoshihiro Kawahara (the University of Tokyo)
- The 22nd International Conference on Pervasive Computing and Communications
- April 22, 2024
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- CONFERENCE (INTERNATIONAL)
- Eye-tracking AD: Cutting-Edge Web Advertising on Smartphone Aligned with User's Gaze
- Kota Tsubouchi, Kenta Taoka (the University of Tokyo), Kaori Ikematsu, Shota Yamanaka, Koya Narumi (the University of Tokyo), Yasuhiro Kawahara (the University of Tokyo)
- The 22nd International Conference on Pervasive Computing and Communications
- April 22, 2024
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- CONFERENCE (INTERNATIONAL)
- Orientation Estimation using Differences in WiFi Signal Behavior in LOS and NLOS Cases
- Jiaqing Yang (Ritsumeikan University), Kota Tsubouchi, Shoma Nakamae (Ritsumeikan University), Nobuhiko Nishio (Ritsumeikan University)
- The 22nd International Conference on Pervasive Computing and Communications
- April 22, 2024
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- OTHERS (DOMESTIC)
- GNSS衛星ごとの信号情報に対する点群ニューラルネットワークを用いたUVインデックス推定
- 厚見 昴 (東京大学), 石岡 陸 (東京大学), 坪内 孝太, 西山 勇毅 (東京大学), 瀬崎 薫 (東京大学)
- 情報処理学会ユビキタスコンピューティングシステム研究会
- March 19, 2024
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- OTHERS (DOMESTIC)
- トピックモデルと大規模位置履歴を用いた地域ごとの興味関心分布の分析
- 宮永 薫 (東京工業大学), 安納 爽響 (東京工業大学), 坪内 孝太, 下坂 正倫 (東京工業大学)
- 情報処理学会ユビキタスコンピューティングシステム研究会
- March 19, 2024
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- JOURNAL (INTERNATIONAL)
- Boosting Feedback: A Framework for Enhancing Ground Truth Data Collection
- Kota Tsubouchi, Tatsuru Higurashi, Shuji Yamaguchi
- 2023 IEEE International Conference on Big Data
- March 01, 2024
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- JOURNAL (INTERNATIONAL)
- SSCDV: Social Media Document Embedding with Sentiment and Topics for Financial Market Forecasting
- Kentaro Ueda (Nara Institute of Science and Technology), Hirohiko Suwa (Nara Institute of Science and Technology), Masaki Yamada (Ritsumeikan University), Yuki Ogawa (Ritsumeikan University), Eiichi Umehara (Niigata University of International and Information Studies), Tatsuo Yamashita, Kota Tsubouchi, Keiichi Yasumoto (Nara Institute of Science and Technology)
- Expert Systems with Applications
- January 12, 2024
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- CONFERENCE (INTERNATIONAL)
- Data-driven Simulation of Wireless Communication Signal Strength in Indoor Environments
- Takuhiro Shimokawa (Tokyo Institute of Technology), Kota Tsubouchi, Yoshihiro Kawahara (The University of Tokyo), Hiroaki Murakami (The University of Tokyo), Masamichi Shimosaka (Tokyo Institute of Technology)
- The thirteenth edition of the International Conference on Indoor Positioning and Indoor Navigation
- December 08, 2023
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- CONFERENCE (INTERNATIONAL)
- Enhancing Indoor Altitude Estimation on Smartphones: Resolving Ventilation Fan Effects
- Kota Tsubouchi, Yuki Hirayama (Ritsumeikan University), Takuzo Ikuta (Ritsumeikan University), Nobuhiko Nishio (Ritsumeikan University)
- The thirteenth edition of the International Conference on Indoor Positioning and Indoor Navigation
- December 08, 2023
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- WORKSHOP (DOMESTIC)
- ハンズフリーのデバイス操作のための汎用イヤラブルデバイスのIMUセンサーを用いた表情認識手法
- 北森 迪耶 (東京工業大学), 坪内 孝太, 西尾 信彦 (立命館大学), 西山 勇毅 (東京大学), 下坂 正倫 (東京工業大学)
- 情報処理学会ユビキタスコンピューティングシステム研究会
- November 21, 2023
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- WORKSHOP (DOMESTIC)
- 敵対的生成モデルに基づく活動人口の波形描画を用いた混雑寿命予報
- 安納 爽響 (東京工業大学), 坪内 孝太, 下坂 正倫 (東京工業大学)
- 情報処理学会ユビキタスコンピューティングシステム研究会
- November 21, 2023
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- JOURNAL (INTERNATIONAL)
- CityOutlook+: Early Crowd Dynamics Forecast through Unbiased Regression with Importance-based Synthetic Oversampling
- Soto Anno (Tokyo Institute of Technology), Kota Tsubouchi, Masamichi Shimosaka (Tokyo Institute of Technology)
- IEEE Pervasive Computing
- November 07, 2023
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- JOURNAL (INTERNATIONAL)
- Data-Driven Estimation of Economic Indicators with Search Big Data in Discontinuous Situation
- Goshi Aoki (Keio University), Kazuto Ataka, Takero Doi (Keio University), Kota Tsubouchi
- The Journal of Finance and Data Science
- November 07, 2023
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- JOURNAL (INTERNATIONAL)
- Forecasting Citywide Crowd Transition Process via Convolutional Recurrent Neural Networks
- Zekun Cai (the University of Tokyo), Renhe Jiang (the University of Tokyo), Xinlei Lian (the University of Tokyo), Chuang Yang (the University of Tokyo), Zhaonan Wang (National Institute of Advanced Industrial Science and Technology), Zipei Fan (the University of Tokyo), Kota Tsubouchi, Hill Hiroki Kobayashi (the University of Tokyo), Xuan Song (the University of Tokyo), Ryosuke Shibasaki (the University of Tokyo)
- IEEE Transactions on Mobile Computing
- October 17, 2023
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- CONFERENCE (INTERNATIONAL)
- Single-tap Latency Reduction with Single- or Double- tap Prediction
- Naoto Nishida* (The University of Tokyo) , Kaori Ikematsu*, Junichi Sato, Shota Yamanaka, Kota Tsubouchi, *co-first authors
- The ACM International Conference on Mobile Human-Computer Interaction
- September 13, 2023
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- JOURNAL (INTERNATIONAL)
- Large-scale Estimation and Analysis of Web Users' Mood from Web Search Query and Mobile Sensor Data
- Wataru Sasaki (Keio University), Satoki Hamanaka (Keio University), Satoko Miyahara, Kota Tsubouchi, Jin Nakazawa (Keio University), Tadashi Okoshi (Keio University)
- Big Data
- June 14, 2023
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- CONFERENCE (DOMESTIC)
- 新聞と株式掲示板を用いた金融指標の予測と売買シミュレーション
- 細川 蓮 (立命館大学), 山田 優生 (立命館大学), 上田 健太郎 (奈良先端科学技術大学院大学), 諏訪 博彦 (奈良先端科学技術大学院大学), 梅原 英一 (新潟国際情報大学), 山下 達雄, 坪内 孝太, 小川 祐樹 (立命館大学)
- 2023年度 人工知能学会全国大会(第37回)
- June 09, 2023
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- CONFERENCE (DOMESTIC)
- 災害時の時々刻々と変わる情報ニーズの把握
- 坪内 孝太, 日暮 立, 藤島新也 (日本放送協会), 麻生重樹 (日本放送協会)
- 2023年度 人工知能学会全国大会(第37回)
- June 09, 2023
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- CONFERENCE (DOMESTIC)
- 社内コンペティションによる閉店拠点の予測
- 竹下 奈知子, 山口 修司, 笹谷 奈翁美, 坪内 孝太
- 2023年度 人工知能学会全国大会(第37回)
- June 09, 2023