Yusaku FUJII, PhD

AI Governance

1. Verifiable record of AI output for privacy protection: public space watched by AI-connected cameras as a target exampleY. Fujii — AI & Society, Vol.40, pp.3697–3706, 2025.doi.org/10.1007/s00146-024-02122-8
2. Governing AI Output in Autonomous Driving: Scalable Privacy Infrastructure for Societal AcceptanceY. Fujii — Future Transportation, Vol.5, No.3, 116, 2025.doi.org/10.3390/futuretransp5030116
3. Smartphone-Based Sensing Network for Emergency Detection: A Privacy-Preserving Framework for Trustworthy Digital GovernanceY. Fujii — Applied Sciences, Vol.16, No.2, 1032, 2026.mdpi.com/2076-3417/16/2/1032
4. Governing Continuous Smartphone Sensing: A Privacy-Preserving Path Toward Democratic Homeland SecurityY. Fujii — J. Homel. Secur. Emerg. Manag. (Opinion), 2026.doi.org/10.1515/jhsem-2026-0014
5. VRAIO as a Safety Valve: Governing AI Platform Outputs at Societal ScaleY. Fujii — AI and Ethics, Vol.6, 340, 2026.doi.org/10.1007/s43681-026-01206-z Free read: rdcu.be/foFnD
6. No Trust Without Trust Infrastructure: The Extended Kelvin Principle and Its Application to AI Output GovernanceY. Fujii — AI, Vol.7, No.6, 218, 2026.mdpi.com/2673-2688/7/6/218

AGI Problem

1. Lessons from the Roman Empire: ‘Bread and Circuses’ as a Model for Democracy in the AGI AgeY. Fujii — AI & Society, Vol.41, pp.467–468, 2026.doi.org/10.1007/s00146-025-02449-w Free read: rdcu.be/ev0Kd

Fully Monitored Public Space (FMPS)

1. Governing AI Outputs in the Fully Sensed Society: Is Output Governance Sufficient for Social Acceptance?Y. Fujii — Smart Cities, Vol.9, No.10, 168, 2026.mdpi.com/2624-6511/9/10/167

Measures for the Next Pandemic

1. Privacy-Preserving Measurement Infrastructure

1. From Measurement Failure to Privacy Infrastructure: Reframing Contact Tracing Governance for the Next PandemicY. Fujii — JMIR, Vol.28, e99645, 2026.dx.doi.org/10.2196/99645

2. PAPR for Everyone

1. An Engineering Alternative to Lockdown During COVID-19 and Other Airborne Infectious Disease Pandemics: Feasibility StudyY. Fujii — JMIR Biomedical Engineering, Vol.9, e54666, 2024.biomedeng.jmir.org/2024/1/e54666
2. Examination of the requirements for powered air-purifying respirator (PAPR) utilization as an alternative to lockdownY. Fujii — Scientific Reports, Vol.15, 1217, 2025.nature.com/articles/s41598-024-82348-0
3. Estimation of Respiratory States Based on a Measurement Model of Airflow Characteristics in PAPR Using Differential Pressure and PWM Control Signals: In the Development of a Public-Oriented PAPR as an Alternative to Lockdown MeasuresY. Fujii, A. Takita, S. Hashimoto, K. Amagai — Sensors, Vol.25, No.9, 2939, 2025.doi.org/10.3390/s25092939
4. The Real-Time Estimation of Respiratory Flow and Mask Leakage in a PAPR Using a Single Differential-Pressure Sensor and Microcontroller-Based Smartphone Interface in the Development of a Public-Oriented Powered Air-Purifying Respirator as an Alternative to Lockdown MeasuresY. Fujii — Sensors, Vol.25, No.17, 5340, 2025.doi.org/10.3390/s25175340
5. Time-managed PAPR use enables a balanced approach to infection control and personal freedomY. Fujii — Scientific Reports, Vol.16, 2878, 2026.doi.org/10.1038/s41598-025-32625-3
6. Reframing Pandemic Preparedness: Why Positive-Pressure Exposure Control Merits Formal Public Health EvaluationY. Fujii — JMIR Public Health and Surveillance, Vol.12, e90211, 2026.dx.doi.org/10.2196/90211

Precision Measurement / The Levitation Mass Method (LMM)

1. Towards Dynamic Calibration of Force Transducers: Self Error Correction Using the Second Derivative of Sensor OutputY. Fujii — Experimental Techniques, 2025.doi.org/10.1007/s40799-025-00860-y Free read: rdcu.be/eVmFA
2. Noise-Robust Frequency Estimation via Overlapped Sampling-Intervals Zero-Crossing FittingP. Youplao, N. Pornsuwancharoen, Y. Fujii — IEEE Trans. Instrum. Meas. (Online first), 2026.doi.org/10.1109/TIM.2026.3693432