Japan Hydro Power: Generation, Share and Trend
Japan generated 73.9 TWh of electricity from hydro in 2025, 7.2% of its total, according to Ember. That made it the 9th largest hydro power producer in 2025 of the 153 countries with Ember data, comparing each country's latest year. Hydro supplied 14.0% of the world's electricity in 2025. These are annual statistics for 2025, with monthly figures through July 2026; they are compiled from national sources and are not real time.
Key Facts
- Japan generated 73.9 TWh of electricity from hydro in 2025.
- Hydro supplied 7.2% of Japan's electricity in 2025.
- Japan was the 9th largest hydro power producer in 2025 among the 153 countries with Ember data, comparing each country's latest year.
- Japan's hydro generation in 2025 was 6% lower than in 2020, when it was 78.3 TWh.
- Japan's hydro generation in 2025 was 14% lower than in 2015, when it was 85.8 TWh.
- Japan's hydro generation peaked at 94.4 TWh in 1991.
- Japan's hydro share in 2025 was below the world share of 14.0%.
- Japan had 28.3 GW of hydro generating capacity in 2025.
Key Figures, 2025
| Measure | Value | As of / source |
|---|---|---|
| Hydro generation | 73.9 TWh | 2025 · Ember |
| Share of Japan's electricity | 7.2% | 2025 · Ember |
| World share of hydro | 14.0% | 2025 · Ember |
| Rank by hydro generation (each country's latest year) | 9 of 153 | 2025 · Ember |
| Hydro capacity | 28.3 GW | 2025 · Ember |
Hydro Generation Year by Year
Ember annual statistics, 1985 to 2025Annual statistics through 2025, TWh
| Year | Hydro |
|---|---|
| 1985 | 82.9 TWh |
| 1986 | 80.8 TWh |
| 1987 | 74.8 TWh |
| 1988 | 90.3 TWh |
| 1989 | 91.7 TWh |
| 1990 | 86.9 TWh |
| 1991 | 94.4 TWh |
| 1992 | 80.1 TWh |
| 1993 | 92.6 TWh |
| 1994 | 64.5 TWh |
| 1995 | 78.8 TWh |
| 1996 | 77.2 TWh |
| 1997 | 86.4 TWh |
| 1998 | 89.1 TWh |
| 1999 | 83.8 TWh |
| 2000 | 84.5 TWh |
| 2001 | 81.5 TWh |
| 2002 | 80.6 TWh |
| 2003 | 92.5 TWh |
| 2004 | 91.7 TWh |
| 2005 | 77.6 TWh |
| 2006 | 88.8 TWh |
| 2007 | 74.5 TWh |
| 2008 | 75.2 TWh |
| 2009 | 70.5 TWh |
| 2010 | 88.5 TWh |
| 2011 | 82.5 TWh |
| 2012 | 77.1 TWh |
| 2013 | 79.3 TWh |
| 2014 | 81.7 TWh |
| 2015 | 85.8 TWh |
| 2016 | 79.4 TWh |
| 2017 | 79.2 TWh |
| 2018 | 81.0 TWh |
| 2019 | 73.9 TWh |
| 2020 | 78.3 TWh |
| 2021 | 79.6 TWh |
| 2022 | 74.9 TWh |
| 2023 | 74.5 TWh |
| 2024 | 79.5 TWh |
| 2025 | 73.9 TWh |
Annual statistics through 2025, % of generation
| Year | Japan | World |
|---|---|---|
| 1985 | 12.3% | n/a |
| 1986 | 12.0% | n/a |
| 1987 | 10.4% | n/a |
| 1988 | 12.0% | n/a |
| 1989 | 11.5% | n/a |
| 1990 | 9.9% | n/a |
| 1991 | 10.4% | n/a |
| 1992 | 8.7% | n/a |
| 1993 | 10.0% | n/a |
| 1994 | 6.6% | n/a |
| 1995 | 7.8% | n/a |
| 1996 | 7.5% | n/a |
| 1997 | 8.2% | n/a |
| 1998 | 8.4% | n/a |
| 1999 | 7.8% | n/a |
| 2000 | 7.7% | 17.2% |
| 2001 | 7.5% | 16.5% |
| 2002 | 7.3% | 16.3% |
| 2003 | 8.5% | 15.7% |
| 2004 | 8.2% | 16.1% |
| 2005 | 6.7% | 16.1% |
| 2006 | 7.6% | 16.0% |
| 2007 | 6.3% | 15.5% |
| 2008 | 6.4% | 16.1% |
| 2009 | 6.3% | 16.3% |
| 2010 | 7.7% | 16.1% |
| 2011 | 7.5% | 15.9% |
| 2012 | 7.0% | 16.3% |
| 2013 | 7.3% | 16.4% |
| 2014 | 7.7% | 16.3% |
| 2015 | 8.3% | 16.2% |
| 2016 | 7.5% | 16.3% |
| 2017 | 7.4% | 16.0% |
| 2018 | 7.5% | 15.8% |
| 2019 | 7.1% | 15.8% |
| 2020 | 7.8% | 16.3% |
| 2021 | 7.7% | 15.2% |
| 2022 | 7.2% | 15.0% |
| 2023 | 7.4% | 14.3% |
| 2024 | 7.8% | 14.4% |
| 2025 | 7.2% | 14.0% |
| Year | Generation | Share | World share | Capacity |
|---|---|---|---|---|
| 2025 | 73.9 TWh | 7.2% | 14.0% | 28.3 GW |
| 2024 | 79.5 TWh | 7.8% | 14.4% | 28.2 GW |
| 2023 | 74.5 TWh | 7.4% | 14.3% | 28.2 GW |
| 2022 | 74.9 TWh | 7.2% | 15.0% | 28.1 GW |
| 2021 | 79.6 TWh | 7.7% | 15.2% | 28.0 GW |
| 2020 | 78.3 TWh | 7.8% | 16.3% | 28.1 GW |
| 2019 | 73.9 TWh | 7.1% | 15.8% | 28.1 GW |
| 2018 | 81.0 TWh | 7.5% | 15.8% | 28.1 GW |
| 2017 | 79.2 TWh | 7.4% | 16.0% | 28.1 GW |
| 2016 | 79.4 TWh | 7.5% | 16.3% | 28.2 GW |
Full year by year history for Japan
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025. World shares are Ember's World totals; ranks compare each country's latest year, which can differ between countries.
Hydro Generation Month by Month
Ember monthly statistics through July 2026Monthly statistics through July 2026, TWh
| Month | Hydro |
|---|---|
| 2024-08 | 5.89 TWh |
| 2024-09 | 5.67 TWh |
| 2024-10 | 4.79 TWh |
| 2024-11 | 4.57 TWh |
| 2024-12 | 4.40 TWh |
| 2025-01 | 4.13 TWh |
| 2025-02 | 3.41 TWh |
| 2025-03 | 5.15 TWh |
| 2025-04 | 6.99 TWh |
| 2025-05 | 8.66 TWh |
| 2025-06 | 8.18 TWh |
| 2025-07 | 6.54 TWh |
| 2025-08 | 6.12 TWh |
| 2025-09 | 5.61 TWh |
| 2025-10 | 4.31 TWh |
| 2025-11 | 3.80 TWh |
| 2025-12 | 4.42 TWh |
| 2026-01 | 4.31 TWh |
| 2026-02 | 3.76 TWh |
| 2026-03 | 4.64 TWh |
| 2026-04 | 7.34 TWh |
| 2026-05 | 7.25 TWh |
| 2026-06 | 7.09 TWh |
| 2026-07 | 6.99 TWh |
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of July 2026. Monthly figures for Japan can differ slightly from the annual totals.