Visualize the Energy Transition in Japan

ISEP Energy Chart is an energy data visualization project conducted by ISEP. Interpret the rapid development of renewable energies through data analysis.

In leading countries such as Germany and Denmark, energy generation data is timely released. It is then visualized by governments or private institutes for research and policy proposals.

Thanks to this shared data, scientific analyses from many different perspectives are conducted and new strategies to increase renewable energies are developed. This has contributed to the progress of the energy transition.

ISEP has created graphs and conduct analyses for purposes including policy proposals and making of “Renewables Japan Status Report” by using published data. However, much of the specific data has been kept private, which is one of the challenges for the visualization of energy data.

Accompanied by the electricity system reform, hourly electricity generation data from each of the 10 grid operators have been opened to the public since April 2016. This data is, however,  made available with a time lag of several months.

We started to compile data on electricity supply and demand. We believe that there is a need to publicize the expertise and graphs from this data in an accessible form. That is why we have created ISEP Energy Chart website to visualize the energy generation data and other data.

Website Functions
  • Electricity Generation and Demand – View graphs which show the electricity generation and demand from various sources for a specified region and its time period.
  • Renewable Energy Share in Electricity – View pie charts of the distribution of electricity generation from various sources for a specified region and its time period.
  • Cumulative Installed Capacity (Electricity) – View bar graphs of the annual cumulative generation capacity of installed renewable energy electricity facilities.
  • Cumulative Installed Capacity (Heat) – View bar graphs of the annual cumulative generation capacity of installed renewable energy heat facilities.
  • Data Search – Search the maximum and minimum records of renewable energy generation for a specified region and its time period.
  • Blog – Articles providing explanations of noteworthy graphs and recent events.
Data Sources

Electricity Generation and Demand, Renewable Energy Share in Electricity:

  • Websites of General Electricity Utilities

Cumulative Installed Capacity (Electricity):

  • “Solar PV” data is estimated from quarterly data of the domestic shipment by the Japan Photovoltaic Energy Association (JPEA) until FY2011, and is collected from the FIT policy website by Ministry of Economy, Trade and Industry (METI) since FY2012.
  • “Wind power” data is collected from the reports by the Japan Wind Power Association (JWPA).
  • “Geothermal” data is collected from the report “Current Situation and Trend of Geothermal Power Generation” by the Thermal and Nuclear Power Engineering Society until FY2011, and is collected from the FIT policy website by METI since FY2012.
  • “Biomass” data is collected from the RPS law database until FY 2011, and is collected from the FIT policy website by METI since FY2012 (excluding coal co-firing of biomass ratio of 60% or less).
  • “Small hydro” data is collected from the RPS law database and the “Hydro Power Plant Database” by the Japan Electric Power Civil Engineering Association about waterway type with a flow-in type or regulated reservoir with output of 10 MW or less until FY2011, and is collected from the FIT policy website by METI since FY2012.

Cumulative Installed Capacity (Heat):

  • “Solar water heating system” data is collected from the “Solar System Data Book” by the JSSDA (Japan Solar System Development Association) and ISEP.
  • “Wood biomass boiler system” data is collected from the wood biomass energy usage investigation by Ministry of Agriculture, Forestry and Fisheries.
  • “Geothermal heat pump” data is collected from thermal energy usage survey of 2016 by Ministry of Environment.
Produce

Noriaki Yamashita (Institute for Sustainable Energy Policies)

Web design

Shota Furuya (Institute for Sustainable Energy Policies)

Web engineering

Shota Minowa

License

This website is provided under the Creative Commons Attribution-ShareAlike 4.0 International License.

Downloaded graphs can be freely used for research, educational and commercial purposes by providing credit to ISEP. For modifying graphs, you need to allow use of the work by a third party.

Citation Example

Source: Institute for Sustainable Energy Policies (2018) ISEP Energy Chart “Electricity Generation and Demand” Nationwide April 1-7, 2018 Data.

Credits

This website is sponsored by “2017 Environment Preservation Project Assistance” program of Sompo Japan Nipponkoa Environment Foundation.

This website is sponsored by ERCA Environmental Restoration and Conservation Agency.

Notes

Data update

  • We are planning to update the data every quarter, but it may take time depending on various circumstances.

Data Source

  • We gathered information from published data and statistics of general electricity utilities, and also from accumulated database of ISEP.

Data correction

  • Graphs may change their designs due to updates.
  • Data may be retroactively modified. We will not notify users before modification. We thank you in advance for your understanding.

Disclaimer

  • ISEP is dovoted to maintaining this website as possible regarding the data, graphs etc. However, we are not responsible or liable for any loss or damage on any sort as the result of misusing the posted data from this website.

Maintenance

  • This system may not be operating without notice due to maintenance etc.
  • Graphs may not be displayed correctly depending on browser setting etc.