Publications - LY Corporation R&D

OTHERS (INTERNATIONAL)
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); February 03, 2026

OTHERS (INTERNATIONAL)
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); February 02, 2026

JOURNAL (INTERNATIONAL)
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); January 30, 2026

JOURNAL (DOMESTIC)
Image Style Transfer Model Retrieval using Transformer Encoder and Learning to Rank: Huu-Long Pham (Hyougo university), Yoshiyuki Shoji (Shizuoka university), Sumio Fujita, Hiroaki Ohshima (Hyougo university); 情報処理学会論文誌データベース (IPSJ-TOD); January 26, 2026

CONFERENCE (INTERNATIONAL)
Cost-Minimized Label-Flipping Poisoning Attack to LLM Alignment: Shigeki Kusaka (University of Tsukuba), Keita Saito (University of Tsukuba), Mikoto Kudo (University of Tsukuba/RIKEN AIP), Takumi Tanabe, Akifumi Wachi, Youhei Akimoto (University of Tsukuba/RIKEN AIP/Institute of Science Tokyo); The 40th Annual AAAI Conference on Artificial Intelligence (AAAI-26); January 24, 2026

OTHERS (INTERNATIONAL)
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); January 21, 2026

OTHERS (INTERNATIONAL)
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); January 08, 2026

WORKSHOP (INTERNATIONAL)
Wildlife Detection using Motion History Information Captured by Camera Trap in the Dark: Shogo Yoshida (Nara Institute of Science and Technology), Yuki Matsuda (Okayama University/Nara Institute of Science and Technology), Kota Tsubouchi, Hirohiko Suwa (Nara Institute of Science and Technology), Keiichi Yasumoto (Nara Institute of Science and Technology); 27th International Conference on Distributed Computing and Networking (ICDCN 26); January 08, 2026

JOURNAL (INTERNATIONAL)
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); December 23, 2025

CONFERENCE (INTERNATIONAL)
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); December 22, 2025

JOURNAL (DOMESTIC)
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); December 15, 2025

WORKSHOP (INTERNATIONAL)
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); December 09, 2025

WORKSHOP (INTERNATIONAL)
Evaluating Self-Supervised Speech Models Via Text-Based LLMs: Takashi Maekaku, Keita Goto, Jinchuan Tian (Carnegie Mellon University), Yusuke Shinohara, Shinji Watanabe (Carnegie Mellon University); 2025 IEEE Automatic Speech Recognition and Understanding Workshop (ASRU 2025); December 08, 2025

CONFERENCE (INTERNATIONAL)
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); December 08, 2025

CONFERENCE (INTERNATIONAL)
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); December 05, 2025

CONFERENCE (INTERNATIONAL)
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); December 05, 2025

CONFERENCE (INTERNATIONAL)
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); December 04, 2025

CONFERENCE (INTERNATIONAL)
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); December 04, 2025

CONFERENCE (INTERNATIONAL)
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); December 04, 2025

CONFERENCE (INTERNATIONAL)
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); December 03, 2025