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Energy policy research group

Climate change is the greatest challenge of our time. Energy issues are particularly complex, and cross multiple fields of knowledge. Motivated students with various backgrounds in "Energy Policy Research Group” contributes at its scale and in different ways to provide energy solutions to the challenges currently faced by society. Members research projects are summarized below.

1.  Energy policy research

There are a number of policy misalignments for decarbonization, such as finance, taxation, trade policies, innovation and adaptation, remained in three sectors: electricity, urban mobility and spatial planning. We propose aligning the regulation for new technology to accelerate the decarbonization by conducting international/domestic policy review and various of model analysis.


Proposal for grid management reform for Japan.

References; Tatsuya Wakeyama, Assessment on Interregional Grid Management for Renewable Energy Integration in Japan, 15th Wind Integration Workshop, Austria, November 2016


2.  Electricity system model analysis

For the purpose to delineate a picture of the 100% renewable energy power system, we conduct model analysis of energy scenario with the case of high integration of renewables for 2030 to 2050 by using GIS, capacity expansion model, economic dispatch model, unit commitment model, market model and grid model.


International collaboration: Study on integrating renewables into the Japanese power grid by 2030.

References; Rena Kuwahata, Peter Merk, Tatsuya Wakeyama, Dimitri Pescia, Steffen Rabe, Shota Ichimura, Renewables integration grid study for the 2030 Japanese power system, IET Renewable Power Generation


3.  Future energy technology and grid

In future energy system dominated by zero-marginal cost renewable energy, there are many prosumers on the grid and new trade, balancing, settlement and consumption of energy are expected. We propose the future energy technology and grid by transdisciplinary approaches by using engineering, economics, computer science, artificial intelligence and mathematical sociology.


Jinesh Mohan

IGP-C (MEXT Scholarship), Energy Course, M2 student

Modeling of the solar power output forecast system for Hyderabad Railway Station (India) using Transfer Learning and Hidden Markov Model

Indian Railways has set an ambitious target of becoming a net carbon-zero transporter by 2030. With the rapid adoption of photovoltaic (PV) systems on the railways and their integration into the electricity grid, it has become a necessity to accurately forecast the photovoltaic output at their intended site of use for effective energy management to mitigate the instability of the grid caused by the intermittency of solar power. The literature shows that transfer learning and Hidden Markov Models (HMM) have shown promising results in various applications. However, the scarcity of data in new installations is a big impediment to effective energy management. The research aims to model a solar power forecast system using transfer learning from a pretrained HMM model capable of predicting solar irradiance using the weather parameters as inputs. The real data of the solar power output of Hyderabad Railway Station in India is used to test the results. The input weather parameters (Global Horizontal Irradiance, Temperature maximum, Skin temperature, humidity, and wind speed) from the Indian Meteorological Department and the solar power output from the datalogger of the plant will be used to train and test the model. See figure below for overall concept of the research in general.

Hu Dongzi

IGP-C, Energy Course, M2 student

V2G Integration on multi-energy source microgrid in Xi’an China considering the economic return benefits

In China, the transportation sector consumes a large proportion of total energy demand but also is the main source of carbon dioxide emission. Transportation consumed more than 14 million terajoule and emitted 901Mt carbon dioxide in 2019. What’s worse, vehicles accounted for 42% of the total consumption of crude oil and more than 80% of refined oil. In order to achieve zero emission target in China as soon as possible, Integrated EV to a multi-energy source microgrid can be a good solution(see figure below). From energy generation transformation aspect, Microgrid uses distributed clean energy which is a good solution of improper energy usage and solves the problem of over dependent on traditional energy sources. From the transportation aspect, EV is a kind of new clean energy vehicle which undoubtedly reduces harmful gas emissions. Combined these two part in the research and then analysis their economic and environmental return can speed up the sustainable development of society by persuading more EV cars’ owners join in the interaction between cars and grid.

Muneaki Kamioosako

Energy course, M1 student

The stable power supply system on the moon

Due to NASA's Artemis program, manned exploration on the moon will resume, accelerating moon development and making it increasingly important in the field of space exploration. While solar power is an effective power source in space, there is a problem with interrupted power supply during the long moon nights, which can last about two weeks in equatorial regions. Therefore, a stable power supply system on the moon is necessary. The purpose of this study is to construct a stable power supply system on the moon and to contribute to Earth's power problem by applying the technology developed on the moon. The research method involves conducting an environmental survey on the moon, constructing a power generation, storage, and transmission system, predicting the electricity demand in the moon base, calculating the required power supply, and performing model analysis of the constructed power system.

Muneaki Base Camp.jpg

Zhang Rui

IGP-C, Energy Course, D1 student (Wakeyama Lab)

Government agents’ drivers in municipal solid waste management systems: a case study in Yokohama (Japan) and Suzhou (China)

There is an increased interest in carbon-negative processes for the treatment of municipal solid wastes during past years. To achieve the carbon-neutral target, on-site renewable energy generation will be one of the key prerequisites, especially for East Asian (EA) countries. However, countries like Japan and China still cannot abandon theirs heavily reliant on the import of fossil fuels. Specifically, China experienced both rapid economic maturation and large-scale urbanization, and one obvious problem aroused by urbanization is waste disposal, followed by the increasing Municipal Solid Waste (MSW). Therefore, considering the gap between the current situation and the final goal, Waste to Energy (WtE) conversion technologies and policies are urgently needed in EA countries. In this work, we will mainly focus on techno-econometric analysis while aiming at conducting a comparative case study between two cities: Suzhou and Yokohama. For methodology, a simulation model will be used in this study to visualize the analysis and the results will give recommendations on policy decisions practically.

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Chen Shaoyu

B4 student (Wakeyama lab)


Analysis of the influence of pre-information on the use and selection of renewable energy

Renewable energy has become an increasingly important topic in recent years as society looks for ways to reduce reliance on fossil fuels and combat climate change. However, despite the recognition of the importance of renewable energy, there is several potential obstacles that could hinder its progress. One of these obstacles is known as the NIMBY problem, which refers to the phenomenon of individuals acknowledging the necessity of renewable energy for society but being reluctant to use it themselves.This reluctance to adopt renewable energy technologies may stem from a variety of reasons, such as concerns about cost, inconvenience, or visual impact. Whatever the reason, obstacles like NIMBY problem have the potential to impede the widespread adoption of renewable energy, which could have significant implications for our efforts to address climate change. This research aims to clarify how different information about renewable energy affects consumers' usage intentions and perceptions of renewable energy, as well as how these effects are related to consumers' attributes.

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