Translation guide
The English phrase 'missing link' refers to a hypothetical extinct creature that would bridge an evolutionary gap between species, or more broadly, any crucial missing element needed to complete a connection or understanding. In Japanese, there is no single direct equivalent; the concept is expressed through descriptive phrases or borrowed terms.
Referring to a hypothetical transitional fossil or organism that fills a gap in the evolutionary record.
A direct translation of 'missing link', used in academic and popular science contexts. It literally means 'lost link/ring'.
この化石は失われた環と考えられている。
This fossil is considered to be the missing link.
Referring to a crucial piece of information, person, or thing that is needed to complete a puzzle, argument, or connection.
A natural way to say 'the missing part/piece'. It is versatile and fits many contexts.
この理論にはまだ欠けている部分がある。
There is still a missing link in this theory.
Do not translate 'missing link' word-for-word as ないリンク or 行方不明の鎖. These are unnatural and will not be understood.
In casual conversation, Japanese speakers often use the borrowed term ミッシングリンク for both scientific and figurative meanings. For formal writing, 失われた環 or descriptive phrases are preferred.
The English term borrowed into Japanese, commonly used in scientific and educational contexts.
ミッシングリンクの発見は進化論の大きな証拠となる。
The discovery of a missing link would be strong evidence for the theory of evolution.
Means 'intermediate species', a more technical term used in biology. It does not carry the same cultural weight as 'missing link'.
その生物は爬虫類と鳥類の中間種かもしれない。
That creature might be an intermediate species between reptiles and birds.
Literally 'element that lacks connection', used in formal or analytical contexts.
事件の真相を解明するには、つながりを欠く要素を見つけなければならない。
To solve the case, we must find the missing link.
The borrowed term is also used figuratively, especially in business or technology contexts.
プロジェクト成功のミッシングリンクは、有能なリーダーだ。
The missing link for the project's success is a capable leader.