Iran vs Japan: Annual change in primary energy from hydropower

Iran

-6.92 terawatt-hours

in 2025

Japan

-5.23 terawatt-hours

in 2025

Iran rank

70th

Japan rank

67th

Annual change in primary energy from hydropower over time

Japan currently reports -5.23 terawatt-hours against -6.92 terawatt-hours in Iran, a difference of 1.69 terawatt-hours.

The two have swapped places 40 times across 60 shared years of data; in 1966 it was Japan ahead.

Iran ranks 70th and Japan ranks 67th of 77 countries.

Indicator: Annual change in primary energy from hydropower
Unit: terawatt-hours
Source: Energy Institute - Statistical Review of World Energy (2026); Smil (2017) – with major processing by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 82 places, 4,604 data points, 1966–2025
Last refreshed: 07 August 2026

Change in total energy supply relative to the previous year, measured in terawatt-hours.