Takahiro Sasaki

The common difficulties in solving problems which we are now faced with, such as climate change, loss of bio-diversity, food / energy shortage, economic / social instability and so on, lie in that these problems are 'open systems', where the solvers, i.e. we human ourselves, reside inside the problems as internal observers. This means we can neither have full control over the systems nor restart them from the beginning. Science has had difficulties in handling these kinds of problems because its methods rely on validation or falsification of hypotheses by observing reproducible instances. However, if simulation virtually reproduces an one-time-only-problem, the boundary of applicable range of science can be pushed far beyond. As a specific task, I am currently researching methodologies that can systematically support future socioeconomic decision-making under uncertainty. I am using modeling, simulation and visualization technologies, rather than depending solely on precedent and intuition. My ultimate goal is a holistic understanding of open systems leading to their essential long-term solutions.

Co-evolutionary Dynamics / Multi-agent Systems / Integration of Social Models and Physical Models / Global Modeling and Simulation / Decision-making Under Uncertainty / Optimization of Risk-Return Tradeoffs





Selected Publications

Sasaki, T. (2013) Hierarchical Multi-Agent-Based Model?for Simulating the Prevalence and Evolution of Influenza Virus, Proceedings of SpringSim'13, 61-69

Tokoro, M. and Sasaki, T. (2004)Grounding, Emotion and Learning, Learning Zone of One's Own, 5-14, IOS Press.

Sasaki, T. and Tokoro, M. (1999) Evolving Learnable Neural Networks under Changing Environments with Various Rates of Inheritance of Acquired Characters, Artificial Life 5(3), 203-223, MIT Press.


In 1999, Takahiro Sasaki received his Ph.D. in Computer Science from Keio University, Japan. His Ph.D. title was “A Study on Darwinian and Lamarckian Strategies for Evolutionary Computation.” After graduation, he located himself apart from research activities for a while. He first worked as a strategic staff at the Sony Corporation headquarters and then as a staff for technological promotion at Sony CSL. While observing various issues within the company and also society and even larger the world as a whole during this period, he noticed that many unsolved problems are so complex that there could be no single-bullet solution to completely solve them. This led him to an interest in the notion of “open systems science”, and brought him back to the field of academic research in 2008. Besides his research activities, he loves nature and living things. He is currently enthusiastic about hunting rhinoceros beetles and stag beetles in the woods. He recently got two young Silky Fowls in his garden and looks forward to gathering eggs for his breakfast in the near future. Outside of my research, I like staying physically active. I especially enjoy bouldering, where figuring out how to reach the top reminds me of the process of solving constraint satisfaction problems.