Publications - LINEヤフーの研究開発

その他 (国際)
Inference-Aware Meta-Alignment of LLMs via Non-Linear GRPO: Shokichi Takakura, Akifumi Wachi, Rei Higuchi (The University of Tokyo/RIKEN AIP), Kohei Miyaguchi, Taiji Suzuki (The University of Tokyo/RIKEN AIP); arXiv.org (arXiv); 2026.2.3

その他 (国際)
A Relative-Budget Theory for Reinforcement Learning with Verifiable Rewards in Large Language Model Reasoning: Akifumi Wachi, Hirota Kinoshita (Toyota Technological Institute at Chicago), Shokichi Takakura, Rei Higuchi (University of Tokyo/RIKEN AIP), Taiji Suzuki (University of Tokyo/RIKEN AIP); arXiv.org (arXiv); 2026.2.2

論文誌 (国際)
Constant Rate Scheduling: A General Framework for Optimizing Diffusion Noise Schedule via Distributional Change: Shuntaro Okada, Kenji Doi, Ryota Yoshihashi, Hirokatsu Kataoka, Tomohiro Tanaka; Transactions on Machine Learning Research (TMLR); 2026.1.30

その他 (国際)
Validating Behavioral Proxies for Disease Risk Monitoring via Large-Scale E-commerce Data: Naomi Sasaya, Shigefumi Kishida (Anicom Insurance, Inc.), Ryo Kikuchi (Anicom Insurance, Inc.), Akira Tajima; arXiv.org (arXiv); 2026.1.21

その他 (国際)
A Tool for Estimating Success Rates of Raycasting-Based Object Selection in Virtual Reality: Tatsuya Okuno (Meiji University), Haruto Shimizu (Meiji University), Nobuhito Kasahara (Meiji University), Taiyu Honma (Meiji University), Shota Yamanaka, Homei Miyashita (Meiji University); arXiv.org (arXiv); 2026.1.8

論文誌 (国際)
Leveraging Screen-Integrated Speakers for Hand-Pose Recognition in Mobile Interfaces: Kaori Ikematsu*, Kunihiro Kato* (Tokyo University of Technology), *co-1st authors; International Journal of Human–Computer Interaction (IJHCI); 2025.12.23

カンファレンス (国際)
Omni-CityMood: Vision-based Urban Atmosphere Perception from Every Angle: Yuki Kubota (Institute of Science Tokyo), Kota Tsubouchi, Soto Anno (Institute of Science Tokyo), Kaito Ide (Institute of Science Tokyo), Masamichi Shimosaka (Institute of Science Tokyo); The 33rd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2025); 2025.12.22

論文誌 (国内)
BodSockets：スマホソケット型インタフェースを用いたスマートフォンの背面領域を活用した操作手法の提案: 日下部完 (北海道大学), 池松香, 坂本大介 (北海道大学), 小野哲雄 (京都橘大学); 情報処理学会論文誌ジャーナル (IPSJ Journal); 2025.12.15

ワークショップ (国際)
CAVIARES: Corpus for Audio-Visual Expressive Voice Agent: Jinsheng Chen (The University of Tokyo), Yuki Saito (The University of Tokyo), Dong Yang (The University of Tokyo), Naoko Tanji (The University of Tokyo), Hironori Doi, Byeongseon Park, Yuma Shirahata, Kentaro Tachibana, Hiroshi Saruwatari (The University of Tokyo); 2025 IEEE Automatic Speech Recognition and Understanding Workshop (ASRU 2025); 2025.12.9

カンファレンス (国際)
Learning Disentangled Document Representations Based on a Classical Shallow Neural Encoder: Yuro Kanada (Shizuoka university), Sumio Fujita, Yoshiyuki Shoji (Shizuoka university); The 27th International Conference on Information Integration and Web Intelligence (iiWAS 2025); 2025.12.8

カンファレンス (国際)
A Provable Approach for End-to-End Safe Reinforcement Learning: Akifumi Wachi, Kohei Miyaguchi, Takumi Tanabe, Rei Sato, Youhei Akimoto (University of Tsukuba, RIKEN AIP); The Thirty-Ninth Annual Conference on Neural Information Processing Systems (NeurIPS 2025); 2025.12.5

カンファレンス (国際)
Improved Regret Bounds for Gaussian Process Upper Confidence Bound in Bayesian Optimization: Shogo Iwazaki; The Thirty-ninth Annual Conference on Neural Information Processing Systems (NeurIPS 2025); 2025.12.5

カンファレンス (国際)
Enhancing Freehand VR Interaction Using Fingertip Deformation on User Performance: Kosuke Morimoto (Meiji University), Nobuhito Kasahara (Meiji University), Shota Yamanaka, Homei Miyashita (Meiji University), Keita Watanabe (Meiji University); The 31st ACM Symposium on Virtual Reality Software and Technology (VRST 2025); 2025.12.4

カンファレンス (国際)
Gaussian Process Upper Confidence Bound Achieves Nearly-Optimal Regret in Noise-Free Gaussian Process Bandits: Shogo Iwazaki; The Thirty-Ninth Annual Conference on Neural Information Processing Systems (NeurIPS 2025); 2025.12.4

カンファレンス (国際)
Tunnels vs. Wires: A Comparative Analysis of Two 3D Steering Tasks in Virtual Environments: Mohammadreza Amini (Concordia University), Wolfgang Stuerzlinger (Simon Fraser University), Shota Yamanaka, Hai-Ning Liang (The Hong Kong University of Science and Technology), Anil Ufuk Batmaz (Concordia University); The 31st ACM Symposium on Virtual Reality Software and Technology (VRST 2025); 2025.12.4

カンファレンス (国際)
Offline Guarded Safe Reinforcement Learning for Medical Treatment Optimization Strategies: Runze Yan (Emory University), Xun Shen (Tokyo University of Agriculture and Technology), Akifumi Wachi, Sebastien Gros (Norwegian University of Science and Technology), Anni Zhao (Emory University), Xiao Hu (Emory University); The Thirty-Ninth Annual Conference on Neural Information Processing Systems (NeurIPS 2025); 2025.12.3

ワークショップ (国内)
VR環境におけるレイキャストによるオブジェクトの選択成功率推定ツールの提案: 奥野達也 (明治大学), 清水春翔 (明治大学), 笠原暢仁 (明治大学), 本間大一優 (明治大学), 山中祥太, 宮下芳明 (明治大学); 第33回インタラクティブシステムとソフトウェアに関するワークショップ (WISS 2025); 2025.12.3

カンファレンス (国際)
Preliminary Study on the Effects of On-Screen Tactile Feedback on Virtual Joystick Interaction: Kaoru Shirane (University of Tsukuba), Riku Tsunoda (University of Tsukuba), Hiroki Matsuda (University of Tsukuba), Yuto Wada (University of Tsukuba), Takumi Masuda (University of Tsukuba), Tomohiro Honda (University of Tsukuba), Kaori Ikematsu, Buntarou Shizuki (University of Tsukuba); The 37th Australian Conference on Human-Computer Interaction (OzCHI 2025); 2025.11.28

カンファレンス (国際)
Reducing Perceived Waiting Time with Peripheral Visual Motion: Directional and Device-Specific Effects: Kenjiro Ogawa (Meiji University), Satoshi Nakamura (Meiji University), Shota Yamanaka, Ryota Nakamura (Meiji University); The 37th Australian Conference on Human-Computer Interaction (OzCHI 2025); 2025.11.28

その他 (国際)
CASTELLA: Long Audio Dataset with Captions and Temporal Boundaries: Hokuto Munakata, Takehiro Imamura (Nagoya University), Taichi Nishimura, Tatsuya Komatsu; arXiv.org (arXiv); 2025.11.19