Translation guide
Refers to energy sources that are not fossil fuels, especially renewable and environmentally friendly ones. In Japanese, the most common term is 再生可能エネルギー (renewable energy), but other expressions exist depending on context.
To refer to energy from naturally replenished sources like solar, wind, hydro, etc., often in environmental or policy contexts.
The standard term for 'renewable energy'. Widely used in news, government, and everyday conversation.
The adoption of renewable energy is progressing.
Renewable energy is environmentally friendly.
Literally 'natural energy'. Often used interchangeably with 再生可能エネルギー, but can sound slightly more grassroots or nature-focused.
Power generation using natural energy is increasing.
Emphasizes the 'clean' aspect, often used in marketing or advocacy. Can include nuclear in some contexts, so be careful.
A shift to clean energy is necessary.
To refer to any energy source that replaces conventional fossil fuels, including nuclear or new technologies, often in technical or policy discussions.
Direct translation of 'alternative energy'. Used in technical and policy contexts, but less common in everyday speech than 再生可能エネルギー.
The development of alternative energy is an urgent task.
Means 'new energy'. Often used in policy contexts to refer to emerging energy technologies, including hydrogen, fuel cells, etc.
Invest in new energy research.
To refer to energy sources outside the mainstream, sometimes including experimental or niche technologies.
Technical term meaning 'unconventional energy'. Rarely used in daily conversation; mostly in academic or industry reports.
Exploration of unconventional energy resources is underway.
For most everyday situations, use 再生可能エネルギー. It is the most recognized and neutral term for renewable energy in Japan.
The direct translation 代替エネルギー is correct but can sound technical or formal. In casual conversation, 再生可能エネルギー or 自然エネルギー is more natural.