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Fujii-Komiyama Lab
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A lab that analyzes the future of energy and the environment using mathematical models.
AboutAbout the lab
Solving energy, environmental, and economic problems with mathematical models
The Fujii-Komiyama Lab analyzes problems related to energy, environmental, and economic systems using mathematical methods.
Using mathematical programming, probability and statistics methods, and econometric analysis, the lab evaluates related policies and technology development.
Its research centers on surveying large volumes of data, such as international energy statistics, and writing large-scale computer programs.
The lab examines increasingly complex conditions, including carbon neutrality, disasters, and geopolitical risk, from both engineering and social science perspectives.
Key terms
- Mathematical programming
- A method of expressing a problem as mathematical formulas and finding the combination that gives the best result, such as the lowest cost, under given constraints
- Econometric analysis
- A method of examining economic data with statistical techniques and measuring quantitatively what has how much influence
- Resilience
- The strength to keep functioning, or to recover quickly, even after being hit by a disaster or similar event
NewsLab news
A student received the YOC Excellent Presentation Award at a technical division conference of the Institute of Electrical Engineers of Japan (IEEJ)
A student received the Student Presentation Award from the Japan Society of Energy and Resources
A student was selected for the Excellent Paper Presentation Award by the IEEJ
Students received the Outstanding Graduation Thesis Award and the Hatakeyama Award of the Japan Society of Mechanical Engineers, respectively
A student received the IEEJ YOC Encouragement Award
ResearchResearch themes
Using methods such as mathematical programming, probability and statistics methods, and econometric analysis, the lab analyzes problems related to energy, environmental, and economic systems and evaluates related policies and technology development. In analyzing energy systems, it is necessary to consider several factors at the same time: stable supply, economic efficiency, environmental performance, and safety.
*Illustrative imageGlobal Energy Model
The lab models long-term global energy supply and demand as a large-scale mathematical programming problem. The model includes fuel transport between regions and looks ahead to 2100, evaluating the potential of energy supply technologies and measures against global warming.
*Illustrative imageOptimal Power Generation Mix Model
The lab analyzes how power systems operation and equipment configuration change when large amounts of renewable energy such as wind and solar, energy storage devices, and distributed generation are introduced. It models Japan's entire grid infrastructure and electricity demand in detail.
*Illustrative imageTechnology Selection Model
The lab considers the engineering and economic characteristics of the technologies that make up the energy system in detail, and optimizes technology choices for achieving carbon neutrality. It analyzes carbon capture technologies and vehicle powertrain configurations.
*Illustrative imageStochastic Dynamic Programming Model
By considering states that change with certain probabilities, this model can be used to analyze resilience. The lab conducts analyses that incorporate energy supply disruptions caused by disasters and similar events, combining them with its other linear programming models.
MembersFaculty
The members of the Fujii-Komiyama Lab consist of faculty members, doctoral and master's students, undergraduate students, and secretaries.As of 2026
- ProfessorYasumasa FujiiPublications ↗
- ProfessorRyoichi KomiyamaPublications ↗
VoicesStudent voices
Compiled from answers by students who were in the lab. Ratings and reviews reflect individual students' experiences, not the lab's official views.
Students who take part in an interview may receive a thank-you gift worth ¥1,000, regardless of what they say.
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Liverpool Transmission Substation, New South Wales 04” Chris.sherlock2 / CC BY-SA 4.0 (cropped)
- Global Energy Model: “Earth's City Lights by DMSP, (large)” Data: Marc Imhoff/NASA GSFC, Christopher Elvidge/NOAA NGDC; Image: Craig Mayhew and Robert Simmon/NASA GSFC / Public domain (cropped)
- Optimal Power Generation Mix Model: “Wind Turbines ^ Solar Panels at Upper Holton Wind ^ Solar Farm - geograph.org.uk - 4618332” Geographer / CC BY-SA 2.0 (cropped)
- Technology Selection Model: “Red Trail Energy ethanol CO2 capture plant Richardton ND1” Acroterion / CC BY-SA 4.0 (cropped)
- Stochastic Dynamic Programming Model: “FEMA - 44339 - A damaged high tension line tower in Oklahoma” Win Henderson / Public domain (cropped)
- Related lab (Long Lab): “Blue Marble Eastern Hemisphere” NASA（Reto Stöckli） / Public domain (cropped)
- Related lab (Murakami Lab): “Bingham Canyon Mine (2) - Salt Lake County, Utah - May 11, 2012” David Ratledge / CC BY 4.0 (cropped)
- Related lab (Yoshida Lab): “Power County Wind Farm 002” ENERGY.GOV / Public domain (cropped)
- Related lab (Ihara Lab): “Running Through Paris Heat (153178 - vir 20240806 lrg)” NASA Earth Observatory images by Wanmei Liang and Michala Garrison / Public domain (cropped)
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