| 2020 | SMC | Confirmation of the Instrumental Difference for Each Ion-Sensitive Field-Effect Transistors to Evaluate Mental Workload. | Kenichi Kitamura, Koji Murai, Shin-Ichi Wakida |
| 2017 | IFSA | Evaluation of mental workload for a newly-appointed pilot using salivary NO3 | Kenichi Kitamura, Koji Murai, Shin-Ichi Wakida |
| 2017 | SMC | Construction of port-coordinator duties list for mental workload assessment. | Daiki Kamioka, Koji Murai, Kenichi Kitamura, Shin-Ichi Wakida |
| 2016 | SMC | Evaluation of mixed culture bridge teammates' mental workload using heart rate variability: Simulator-based ship handling. | Kenichi Kitamura, Koji Murai, Masao Furusho, Yibing Wang, Jie Wang, Yoshiaki Kunieda |
| 2016 | SMC | Study on relation between operator and trainee's mental workload for ship maneuvering simulator exercise using heart rate variability. | Ippei Sugimoto, Kenichi Kitamura, Koji Murai, Yibing Wang, Jie Wang |
| 2015 | KES | Study of A Port Coordinator's Mental Workload Based on Facial Temperature. | Koji Murai, Kenichi Kitamura, Yuji Hayashi |
| 2015 | SMC | Evaluation of Mental Workload for Athletes' Training Based on Salivary NO3- Concentration. | Kenichi Kitamura, Koji Murai, Keiichi Fukushi, Yuji Hayashi, Shin-Ichi Wakida |
| 2012 | SMC | Evaluation of ship navigator's mental workload for ship handling based on salivary NO3-. | Kenichi Kitamura, Koji Murai, Keiichi Fukushi, Yuji Hayashi, Nobuo Mitomo, Kenji Yoshimura, Kenjiro Hikida, Shin-Ichi Wakida, Takashi Miyado |