| 2025 | VTC | Nullforming Strategy Based on User Distribution for Spectrum Sharing Between High-Altitude Platforms and Terrestrial Networks. | Kenzo Fontaine, Anders E. Kalr, Tomoaki Ohtsuki, Tsutomu Ishikawa |
| 2025 | VTC | Interference Management with Nullforming and Resource Allocation for Coverage Expansion in Integrated HAPS-Terrestrial Networks. | Tsutomu Ishikawa, Koji Tashiro, Koichi Maki, Kenji Hoshino |
| 2025 | WCNC | Field Trials and Evaluations of Nullforming-Based Spectrum Sharing Between Aerial Platforms and Terrestrial Networks on 5G FDD Bands. | Koji Tashiro, Tsutomu Ishikawa, Kenji Hoshino, Atsushi Nagate |
| 2024 | VTC | Coordinated Nullforming with Limited Control Parameters for Spectrum Sharing Between High-Altitude Platforms and Terrestrial Networks. | Tsutomu Ishikawa, Koji Tashiro, Kenji Hoshino, Atsushi Nagate |
| 2024 | VTC | Implementation and Experimental Evaluation of Nullforming-Based Interference Reduction Scheme for HAPS-Terrestrial Spectrum Sharing. | Koji Tashiro, Tsutomu Ishikawa, Kenji Hoshino, Atsushi Nagate |
| 2023 | VTC | Spectrum Sharing Between High-Altitude Platforms and Terrestrial Networks Using Interference Coordination by Null Sweeping. | Tsutomu Ishikawa, Koji Tashiro, Kenji Hoshino, Atsushi Nagate |
| 1995 | AISTATS | Viewpoint-Based Measurement of Semantic Similarity between Words. | Kaname Kasahara, Kazumitsu Matsuzawa, Tsutomu Ishikawa, Tsukasa Kawaoka |
| 1986 | ICPP | Hierarchical Array Processor (HAP) Featuring High Reliability and High System Performance. | Tsutomu Ishikawa, Shigeharu Momoi, Shigeo Shimada, Yoshio Ogawa |