Translation guide
Describes something that exists or happens in nature without human intervention, or arises spontaneously as part of a natural process.
To say that something is found in the natural world, not made by humans.
A straightforward way to say 'exists in nature'. Suitable for both spoken and written contexts.
この鉱物は自然に存在する。
This mineral is naturally occurring.
Means 'natural' as opposed to artificial or synthetic. Often used attributively.
To describe a phenomenon or event that happens by itself, without being planned or forced.
Common way to say 'happens naturally'. Works for events, changes, or processes.
この反応は自然に起こる。
This reaction occurs naturally.
To say that a quality or feature is naturally part of something, not added later.
Means 'inherently equipped with'. Used for innate characteristics.
この機能はもともと備わっている。
This feature is naturally occurring (built-in).
天然の温泉がこの地域には多い。
There are many naturally occurring hot springs in this area.
Literally 'spontaneously generated'. Used for things that arise naturally without external cause.
自然発生の火災はまれだ。
Naturally occurring fires are rare.
Emphasizes spontaneity. Slightly more formal, often used in academic or technical contexts.
この現象は自発的に生じる。
This phenomenon occurs spontaneously.
Means 'inherent' or 'intrinsic'. Often used in scientific or philosophical contexts.
それは物質の固有の性質だ。
That is a naturally occurring property of the substance.