Japan Electricity Generation & Grid Mix
In 2025, Japan generated 1,029.97 TWh of electricity (3.25% of global output, ranked #5 worldwide). Its primary generation source was Natural Gas at 337.64 TWh (32.8% of the national grid), while low-carbon sources (nuclear + renewables) provided 32.7% of total supply.
Japan Electricity Generation by Source (2025)
2025 Total Output: 1,029.97 TWh · Carbon Intensity: 477 gCO2/kWh
Japan Electricity Generation & Capacity by Source (2025)
| Generation Source | 2025 Output (TWh) | Grid Share (%) | Installed Capacity (GW) | 5Y Change | Share of World Fuel |
|---|---|---|---|---|---|
| Natural Gas | 337.64 TWh | 32.8% | 82.36 GW | -17.5% | 4.9% |
| Coal | 330.12 TWh | 32.0% | 54.58 GW | -3.0% | 3.1% |
| Solar | 101.06 TWh | 9.8% | 92.21 GW | +33.1% | 3.6% |
| Nuclear | 94.09 TWh | 9.1% | 33.08 GW | +118.8% | 3.4% |
| Hydroelectric | 73.90 TWh | 7.2% | 28.30 GW | -5.7% | 1.7% |
| Bioenergy | 54.92 TWh | 5.3% | 6.06 GW | +80.8% | 7.8% |
| Oil & Other Fossil | 25.39 TWh | 2.5% | 20.08 GW | +0.3% | 3.1% |
| Wind | 12.85 TWh | 1.3% | 6.24 GW | +52.8% | 0.5% |
Japan Historical Generation & Emissions Ledger (2000-2025)
| Year | Total (TWh) | Coal | Gas | Nuclear | Hydro | Wind | Solar | Clean % | gCO2/kWh |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 1,030 | 330.1 | 337.6 | 94.1 | 73.9 | 12.9 | 101.1 | 32.7% | 477 |
| 2024 | 1,016.4 | 327.1 | 346.2 | 84.9 | 79.5 | 11.5 | 96.7 | 31.3% | 484 |
| 2023 | 1,006.7 | 326.9 | 347 | 77.5 | 74.5 | 10.0 | 96.4 | 29.8% | 493 |
| 2022 | 1,040.6 | 351 | 378.8 | 51.8 | 74.9 | 9.4 | 91.1 | 25.5% | 520 |
| 2021 | 1,034.7 | 348.3 | 385.8 | 61.2 | 79.6 | 9.5 | 84.2 | 26.0% | 515 |
| 2020 | 1,011 | 340.3 | 409.4 | 43.0 | 78.3 | 8.4 | 75.9 | 23.3% | 528 |
| 2019 | 1,047.4 | 350.8 | 417 | 65.6 | 73.9 | 7.5 | 67.4 | 23.1% | 529 |
| 2018 | 1,082.9 | 360.7 | 445.6 | 49.1 | 81.0 | 7.4 | 61.2 | 20.7% | 542 |
| 2017 | 1,076.9 | 363.5 | 464.1 | 29.1 | 79.2 | 6.2 | 54.0 | 17.9% | 558 |
| 2016 | 1,063.7 | 338.6 | 458.4 | 17.7 | 79.4 | 5.3 | 43.3 | 15.9% | 567 |
| 2015 | 1,030.1 | 349.6 | 417.5 | 4.5 | 85.8 | 5.2 | 34.5 | 15.4% | 578 |
| 2014 | 1,062.7 | 355.6 | 450.9 | 0.0 | 81.7 | 5.0 | 23.6 | 12.6% | 592 |
| 2013 | 1,087.8 | 362.6 | 423.6 | 14.6 | 79.3 | 5.1 | 12.9 | 12.4% | 596 |
| 2012 | 1,106.9 | 334.3 | 435.5 | 18.0 | 77.1 | 4.7 | 7.4 | 11.7% | 595 |
| 2011 | 1,104.2 | 285.1 | 379.8 | 162.9 | 82.5 | 4.5 | 5.4 | 25.0% | 505 |
| 2010 | 1,156 | 316.9 | 326.1 | 292.4 | 88.5 | 3.9 | 4.0 | 35.5% | 447 |
| 2009 | 1,114 | 312.1 | 324.7 | 274.7 | 70.5 | 3.4 | 3.1 | 33.4% | 460 |
| 2008 | 1,183.7 | 333.7 | 324.8 | 251.7 | 75.2 | 2.9 | 2.6 | 29.9% | 485 |
| 2007 | 1,180.1 | 317.3 | 296.9 | 279 | 74.5 | 2.7 | 2.3 | 32.3% | 470 |
| 2006 | 1,164.4 | 311.3 | 280 | 304.3 | 88.8 | 2.1 | 2.0 | 36.0% | 447 |
| 2005 | 1,153.1 | 319.2 | 253.1 | 293 | 77.6 | 1.9 | 1.6 | 34.3% | 462 |
| 2004 | 1,121.2 | 295.4 | 257.9 | 285.9 | 91.7 | 1.4 | 1.3 | 35.5% | 450 |
| 2003 | 1,092.6 | 292.1 | 273.1 | 230.1 | 92.5 | 0.8 | 1.0 | 31.3% | 476 |
| 2002 | 1,103.1 | 264.4 | 252.8 | 314.3 | 80.6 | 0.4 | 0.7 | 37.4% | 434 |
| 2001 | 1,083.1 | 253.9 | 256.5 | 320.5 | 81.5 | 0.3 | 0.5 | 38.7% | 424 |
| 2000 | 1,099.7 | 238.2 | 258.5 | 319.1 | 84.5 | 0.1 | 0.3 | 38.2% | 424 |
Frequently Asked Questions - Japan Power Grid
How much electricity does Japan generate and what is its #1 power source?
In 2025, Japan generated 1,029.97 TWh of electricity (3.25% of global output). Its largest single generation source was Natural Gas at 337.64 TWh (32.8% of the national grid mix).
What share of Japan's electricity comes from clean and renewable sources?
Low-carbon sources (nuclear plus renewables) supplied 32.7% of Japan's electricity in 2025, with renewables accounting for 23.6% and wind plus solar contributing 11.1%. Fossil fuels accounted for 67.3% of total generation.
What is the carbon intensity of Japan's electricity grid?
In 2025, Japan's power sector carbon intensity was 477.4 gCO2/kWh, with total power sector emissions of 491.68 million metric tons of CO2.