Associate Professor ยท Graduate School of Informatics, Nagoya University
Research project
We study large socio-technical systems where many independent systems and people interact, and we develop ways to explain and improve safety, security, and resilience over time.
Detail
A System of Systems is a large structure where multiple independent systems work together to provide a service. Examples include road traffic systems, smart houses, and mobility-as-a-service.
These systems change over time. Their components, connections, and quality of service may all shift, which makes it hard to predict every possible situation in advance.
Detail
In many SoS settings, it is difficult to build complete safety and security guarantees only at design time. New actors appear, systems evolve, and human decisions also affect the whole picture.
Because of this, dependability must be supported not only by initial design, but also by repeated analysis and explanation during operation.
Detail
We model and analyze socio-technical systems as Systems of Systems and study how to assure their overall dependability, including safety, security, and resilience.
Our work compares modeling approaches such as ArchiMate, STAMP, and FRAM, and also explores simpler graph-based descriptions. We further study agreement-building methods based on game theory and explanation methods using assurance cases and GSN.
Related publications
Zhengshu Zhou, Weijie Yu, Tingting Zhao, Qian Long, Yutaka Matsubara, Hiroaki Takada, IEEE Transactions on Network and Service Management, Vol.23, pp.2135-2148, 2026.
Huanjun Zhang, Yutaka Matsubara, Systems, Vol.13, Issue 5, 2025.
Huanjun Zhang, Yutaka Matsubara, IEEE Access, Vol.13, pp.20203-20217, 2025.
Chenda Siv, Yutaka Matsubara, Hiroaki Takada, 2nd IEOM World Congress, Canada, Oct 2025.
Huanjun Zhang, Yutaka Matsubara, ICSRS 2025, Italy, Nov 2025.
Huanjun Zhang, Yutaka Matsubara, Hiroaki Takada, SASSUR 2024 at SAFECOMP 2024, LNCS Vol.14989, pp.200-212, Florence, Sep 2024.
Akihisa Morikawa, Yutaka Matsubara, Daichi Mizuguchi, Kiyoshi Fujiwara, SAFECOMP 2024 Position Paper, Florence, Sep 2024.
Zhengshu Zhou, Yutaka Matsubara, Hiroaki Takada, Reliability Engineering & System Safety, Vol.229, 2023.
Zhengshu Zhou, Yutaka Matsubara, Hiroaki Takada, Computer Systems Science and Engineering, Vol.45, No.1, pp.35-50, 2023.
Zhengshu Zhou, Yutaka Matsubara, Hiroaki Takada, CyberSciTech 2021, pp.43-50, Oct 2021.
Yutaka Matsubara, Journal of Society of Automotive Engineers of Japan, Jan. 2024 Special Issue on Innovation Governance.
Related themes
We study how to keep mixed-criticality systems fast, predictable, and safe even when many applications share CPUs, memory, storage, and networks.
We combine IoT devices with blockchain and smart contracts so that device permissions, data sharing, and lifecycle management can be handled in a transparent way.