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Japan Electricity: Generation Mix, Demand and Emissions

Japan generated 1,027 TWh of electricity in 2025, according to Ember. Gas was the largest source at 32.7%, followed by coal (31.8%) and solar (10.8%). Demand was 1,027 TWh and each kWh generated emitted 474 gCO2/kWh. These are annual statistics for 2025, with monthly figures through September 2026; they are compiled from national sources and are not real time.

Key Facts

  • Japan generated 1,027 TWh of electricity in 2025.
  • Gas supplied 32.7% of Japan's electricity in 2025.
  • Coal supplied 31.8% of Japan's electricity in 2025.
  • Solar supplied 10.8% of Japan's electricity in 2025.
  • Low carbon sources (nuclear and renewables) supplied 33.1% of Japan's generation in 2025.
  • The carbon intensity of Japan's electricity was 474 gCO2/kWh in 2025.
  • Japan's carbon intensity in 2025 was 13% higher than in 1985, when it was 421 gCO2/kWh.
  • Japan had the 5th highest electricity demand among the 96 countries with Ember data for 2025.

Key Figures, 2025

MeasureValueAs of / source
Total generation1,027 TWh2025 · Ember
Electricity demand1,027 TWh2025 · Ember
Demand per person8.37 MWh2025 · Ember
Net imports0 TWh2025 · Ember
Carbon intensity474 gCO2/kWh2025 · Ember
Power sector emissions487 MtCO22025 · Ember
Demand rank (countries with 2025 data)5 of 962025 · Ember

Generation Mix, 2025

SourceGenerationShare
Gas 336 TWh 32.7%
Coal 327 TWh 31.8%
Solar 111 TWh 10.8%
Nuclear 94.1 TWh 9.2%
Hydro 74.3 TWh 7.2%
Bioenergy 47.6 TWh 4.6%
Other fossil 24.5 TWh 2.4%
Wind 12.8 TWh 1.3%
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Year by Year

Ember annual statistics, 1985 to 2025
Japan electricity generation by source, 1985 to 2025 Japan's electricity generation by main source from 1985 to 2025, in TWh. In 2025 the largest sources were gas at 336 TWh, coal at 327 TWh, solar at 111 TWh, nuclear at 94.1 TWh, hydro at 74.3 TWh. 0 125 250 375 500 198519901995200020052010201520202025
Japan's electricity generation by main source from 1985 to 2025, in TWh. In 2025 the largest sources were gas at 336 TWh, coal at 327 TWh, solar at 111 TWh, nuclear at 94.1 TWh, hydro at 74.3 TWh.
Annual statistics through 2025, TWh
Japan electricity generation by source, 1985 to 2025
YearGasCoalSolarNuclearHydro
1985130 TWh101 TWh0 TWh160 TWh82.9 TWh
1986133 TWh100 TWh0 TWh165 TWh80.8 TWh
1987137 TWh109 TWh0 TWh189 TWh74.8 TWh
1988144 TWh114 TWh0 TWh174 TWh90.3 TWh
1989152 TWh118 TWh0 TWh186 TWh91.7 TWh
1990176 TWh121 TWh0 TWh195 TWh86.9 TWh
1991188 TWh128 TWh0 TWh209 TWh94.4 TWh
1992187 TWh134 TWh10.0 GWh217 TWh80.1 TWh
1993187 TWh143 TWh20.0 GWh248 TWh92.6 TWh
1994203 TWh160 TWh30.0 GWh258 TWh64.5 TWh
1995205 TWh172 TWh40.0 GWh287 TWh78.8 TWh
1996217 TWh182 TWh50.0 GWh297 TWh77.2 TWh
1997225 TWh192 TWh100 GWh321 TWh86.4 TWh
1998235 TWh196 TWh140 GWh326 TWh89.1 TWh
1999249 TWh215 TWh220 GWh317 TWh83.8 TWh
2000259 TWh238 TWh340 GWh319 TWh84.5 TWh
2001257 TWh254 TWh500 GWh321 TWh81.5 TWh
2002253 TWh264 TWh690 GWh314 TWh80.6 TWh
2003273 TWh292 TWh950 GWh230 TWh92.5 TWh
2004258 TWh295 TWh1.27 TWh286 TWh91.7 TWh
2005253 TWh319 TWh1.63 TWh293 TWh77.6 TWh
2006280 TWh311 TWh2.00 TWh304 TWh88.8 TWh
2007297 TWh317 TWh2.31 TWh279 TWh74.5 TWh
2008325 TWh334 TWh2.59 TWh252 TWh75.2 TWh
2009325 TWh312 TWh3.05 TWh275 TWh70.5 TWh
2010326 TWh317 TWh3.98 TWh292 TWh88.5 TWh
2011380 TWh285 TWh5.44 TWh163 TWh82.5 TWh
2012435 TWh334 TWh7.37 TWh18.0 TWh77.1 TWh
2013424 TWh363 TWh12.9 TWh14.6 TWh79.3 TWh
2014451 TWh356 TWh23.6 TWh0 TWh81.7 TWh
2015418 TWh350 TWh34.5 TWh4.52 TWh85.8 TWh
2016458 TWh339 TWh43.3 TWh17.7 TWh79.4 TWh
2017464 TWh363 TWh54.0 TWh29.1 TWh79.2 TWh
2018446 TWh361 TWh61.2 TWh49.1 TWh81.0 TWh
2019417 TWh351 TWh67.4 TWh65.6 TWh73.9 TWh
2020409 TWh340 TWh75.9 TWh43.0 TWh78.3 TWh
2021386 TWh348 TWh84.2 TWh61.2 TWh79.6 TWh
2022379 TWh351 TWh91.1 TWh51.8 TWh74.9 TWh
2023347 TWh327 TWh96.4 TWh77.5 TWh74.5 TWh
2024346 TWh327 TWh96.7 TWh84.9 TWh79.5 TWh
2025336 TWh327 TWh111 TWh94.1 TWh74.3 TWh
YearGenerationDemandCarbon intensity
2025 1,027 TWh 1,027 TWh 474 gCO2/kWh
2024 1,016 TWh 1,016 TWh 484 gCO2/kWh
2023 1,007 TWh 1,007 TWh 493 gCO2/kWh
2022 1,041 TWh 1,041 TWh 520 gCO2/kWh
2021 1,035 TWh 1,035 TWh 515 gCO2/kWh
2020 1,011 TWh 1,011 TWh 528 gCO2/kWh
2019 1,047 TWh 1,047 TWh 529 gCO2/kWh
2018 1,083 TWh 1,083 TWh 542 gCO2/kWh
2017 1,077 TWh 1,077 TWh 558 gCO2/kWh
2016 1,064 TWh 1,064 TWh 567 gCO2/kWh

Full year by year history for Japan, 1985 to 2025

Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025.

Month by Month

Ember monthly statistics through September 2026
Japan monthly electricity demand and generation, October 2024 to September 2026 Japan's electricity demand in September 2026 was 70.4 TWh, and generation from the sources Ember reports was 70.4 TWh. Carbon intensity that month was 465 gCO2/kWh. 0 25 50 75 100 2024-102025-042025-102026-04
Japan's electricity demand in September 2026 was 70.4 TWh, and generation from the sources Ember reports was 70.4 TWh. Carbon intensity that month was 465 gCO2/kWh.
Monthly statistics through September 2026, TWh
Japan monthly electricity demand and generation, October 2024 to September 2026
MonthDemandGeneration
2024-1070.2 TWh70.2 TWh
2024-1168.0 TWh68.0 TWh
2024-1281.3 TWh81.2 TWh
2025-0187.2 TWh87.2 TWh
2025-0281.8 TWh81.8 TWh
2025-0377.9 TWh77.9 TWh
2025-0466.6 TWh66.6 TWh
2025-0565.4 TWh65.4 TWh
2025-0673.4 TWh73.4 TWh
2025-0790.4 TWh90.4 TWh
2025-0888.7 TWh88.7 TWh
2025-0980.5 TWh80.5 TWh
2025-1070.6 TWh70.6 TWh
2025-1170.0 TWh70.0 TWh
2025-1281.8 TWh81.8 TWh
2026-0189.7 TWh89.7 TWh
2026-0277.7 TWh77.7 TWh
2026-0376.8 TWh76.8 TWh
2026-0465.4 TWh65.4 TWh
2026-0566.3 TWh66.3 TWh
2026-0668.7 TWh68.7 TWh
2026-0784.0 TWh84.0 TWh
2026-0882.1 TWh82.0 TWh
2026-0970.4 TWh70.4 TWh

Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of September 2026.

Seasonal Patterns in Japan

Ember monthly statistics, complete years only, through September 2026

Electricity demand by month

Look for the brightest columns. Averaged over 2019 to 2025, demand is highest in January and lowest in May, and the busiest month uses 33% more electricity per day than the quietest.

Japan's electricity demand for each month, in TWh, 2019 to 2025. Colour shows demand per day, so short months are not shaded as quiet.
Year JanFebMarAprMayJunJulAugSepOctNovDec
2025 87.2 81.8 77.9 66.6 65.4 73.4 90.4 88.7 80.5 70.6 70.0 81.8
2024 84.2 77.4 79.0 64.7 64.8 68.3 87.2 87.9 80.6 70.2 68.0 81.3
2023 86.7 78.0 72.9 65.2 65.7 70.4 85.6 88.4 80.0 68.2 69.5 80.9
2022 92.5 84.5 78.9 68.1 66.4 72.9 84.9 85.8 76.2 69.3 68.2 83.8
2021 90.9 77.7 76.9 69.0 67.4 71.5 84.4 84.2 73.4 73.2 72.7 85.7
2020 84.5 79.9 77.3 68.2 62.4 68.8 75.3 88.1 74.8 68.9 70.0 85.6
2019 89.1 79.8 80.0 71.5 69.6 71.0 81.1 87.1 78.2 71.4 71.6 82.3
  • Lower demand per day
  • Higher demand per day
  • No data
  • Each cell shows the month's total demand in TWh, and colour compares demand per day so short months are not shaded as quiet. Lowest cell 62.4 TWh, highest 92.5 TWh. Colours are relative to Japan alone.

Low carbon share of generation by month

Look for the brightest columns. Averaged over 2019 to 2025, the low carbon share is highest in May (41%) and lowest in January (24%), a gap of 17.1 points.

Share of Japan's electricity generation from nuclear and renewable sources for each month, in percent, 2019 to 2025.
Year JanFebMarAprMayJunJulAugSepOctNovDec
2025 30% 30% 36% 45% 48% 42% 36% 34% 35% 35% 35% 33%
2024 29% 31% 35% 45% 47% 43% 35% 32% 34% 35% 35% 32%
2023 26% 27% 36% 43% 45% 39% 36% 34% 31% 36% 32% 29%
2022 23% 23% 28% 36% 37% 31% 29% 30% 31% 30% 27% 25%
2021 17% 22% 29% 36% 38% 34% 32% 31% 33% 30% 26% 25%
2020 21% 24% 28% 34% 37% 31% 29% 26% 24% 23% 20% 18%
2019 20% 22% 26% 29% 33% 30% 27% 25% 25% 26% 25% 21%
  • Lower low carbon share
  • Higher low carbon share
  • No data
  • Each cell shows the low carbon share. Lowest cell 17%, highest 48%. Colours are relative to Japan alone.

Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of September 2026. Complete calendar years only.

Countries With a Similar Electricity Mix

Ember annual, 2025

Japan's closest match is South Korea, 79.7% the same, and the match goes both ways, so they are grid twins.

  1. South Korea 79.7% the same · grid twin South Korea generates 20.3 points more nuclear than Japan
  2. Malaysia 77.0% the same Malaysia generates 13.0 points more coal than Japan
  3. Dominican Republic 77.0% the same The Dominican Republic generates 18.0 points more other fossil than Japan
  4. Taiwan 76.7% the same Taiwan generates 16.1 points more gas than Japan
  5. Turkey 75.7% the same Turkey generates 10.6 points less gas than Japan

How close: the share of generation that would have to change fuel for one mix to match the other (half the sum of the fuel share differences); 100% minus that is "the same". Grids under 1 TWh are skipped. Grid twins: the 25 closest pairs and every country's nearest match

Notable Grid Failures Affecting Japan

History, not live data
The 2011 Japan Power Crisis 11 March 2011. Tokyo and Tohoku areas, Japan.

Japan Electricity FAQ

What is the main source of electricity in Japan?

Gas was the largest source of electricity in Japan in 2025, supplying 32.7% of generation, followed by coal (31.8%) and solar (10.8%). Figures are Ember annual statistics.

How much electricity does Japan use?

Japan used 1,027 TWh of electricity in 2025, about 8.37 MWh per person.

How clean is Japan's electricity?

Generating a kilowatt hour of electricity in Japan emitted 474 gCO2/kWh in 2025, and low carbon sources supplied 33.1% of generation. That is 3% above the world average of 460 gCO2/kWh.

When does Japan use the most electricity?

Averaged over 2019 to 2025, Japan's electricity demand is highest in January and lowest in May. The busiest month uses 33% more electricity per day than the quietest (Ember monthly data).

Cite this page
APA 7

World Power Monitor. (2026). Japan Electricity: Generation Mix, Demand and Emissions. https://worldpowermonitor.com/countries/japan/

Plain text

World Power Monitor. Japan Electricity: Generation Mix, Demand and Emissions. Data as of 2026-09. Data from Ember. https://worldpowermonitor.com/countries/japan/

BibTeX 
@misc{wpm_countries_japan_2026,
  title = {{Japan Electricity: Generation Mix, Demand and Emissions}},
  author = {{World Power Monitor}},
  year = {2026},
  note = {Data as of 2026-09. Data from Ember.},
  url = {https://worldpowermonitor.com/countries/japan/}
}

Permalink: https://worldpowermonitor.com/countries/japan/

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