| 2026 | SIGGRAPH | Brushes for XR Experiences. | Kei Kobayashi, Kazuma Nagata |
| 2023 | SIGGRAPH | Calligraphy Experience System That Conveys the Relationship Between Kanji and Nature. | Kei Kobayashi, Kazuma Nagata |
| 2021 | VRST | Table-Based Interactive System for Augmenting Japanese Food Culture Experience. | Kei Kobayashi, Kazuma Nagata, Junichi Hoshino |
| 2020 | AAAI | Out-of-Distribution Detection with Likelihoods Assigned by Deep Generative Models Using Multimodal Prior Distributions. | Ryo Kamoi, Kei Kobayashi |
| 2019 | MMSP | Improving speech intelligibility using microphones on behind the ear hearing aids. | Yusuke Hioka, Kei Kobayashi, Kenta Niwa |
| 2016 | AAAI | Flattening the Density Gradient for Eliminating Spatial Centrality to Reduce Hubness. | Kazuo Hara, Ikumi Suzuki, Kei Kobayashi, Kenji Fukumizu, Milos Radovanovic |
| 2015 | AAAI | Localized Centering: Reducing Hubness in Large-Sample Data. | Kazuo Hara, Ikumi Suzuki, Masashi Shimbo, Kei Kobayashi, Kenji Fukumizu, Milos Radovanovic |
| 2015 | SIGIR | Reducing Hubness: A Cause of Vulnerability in Recommender Systems. | Kazuo Hara, Ikumi Suzuki, Kei Kobayashi, Kenji Fukumizu |
| 2015 | SISAP | Reducing Hubness for Kernel Regression. | Kazuo Hara, Ikumi Suzuki, Kei Kobayashi, Kenji Fukumizu, Milos Radovanovic |
| 2013 | Interspeech | Weighting of acoustic cues shifts to frication duration in identification of fricatives/affricates when auditory properties are degraded due to aging. | Keiichi Yasu, Takayuki Arai, Kei Kobayashi, Mitsuko Shindo |
| 2010 | ALIFE | Mode Switching and Collective Behavior in Chemical Oil Droplets. | Naoto Horibe, Kei Kobayashi, Martin M. Hanczyc, Takashi Ikegami |
| 2001 | ICCS | Crystal Voronoi Diagram and Its Applications to Collision-Free Paths. | Kei Kobayashi, Kokichi Sugihara |