Translation guide
The English word 'youngest' refers to the person or thing with the least age, most recent birth, or lowest seniority in a group. In Japanese, expressing this concept depends on context: family relationships, formal titles, or general comparisons. The most common way is to use the noun 末っ子 (suekko) for the youngest child in a family, or the prefix 最年少 (sainenshō) for the youngest person in a formal group. For general comparisons, phrases like 一番年下 (ichiban toshishita) are used. Note that Japanese often uses specific kinship terms rather than a direct translation of 'youngest'.
youngest child
youngest (age)
youngest (formal)
Referring to the youngest sibling or child in a family context.
The most common and natural word for the youngest child in a family. It carries a nuance of being doted on or having a certain personality typical of the youngest.
He's the youngest child, so he's spoiled.
Literally 'the lowest child', a straightforward way to say youngest child. Slightly more descriptive than 末っ子.
Formal or written term for the youngest child, often used in official documents or literature.
Referring to the person with the lowest age in a group, such as in a class, team, or organization.
Referring to the person with the least experience or shortest tenure in a workplace or organization, not necessarily age.
Describing the birth order position as the youngest without specifying 'child'.
Do not directly translate 'youngest' as 若い (wakai) plus superlative. 一番若い (ichiban wakai) can mean 'youngest' but often sounds like 'most youthful' rather than indicating birth order or seniority. Use context-appropriate terms.
末っ子 (suekko) is a specific noun for the youngest child and carries emotional connotations (e.g., being spoiled). 一番下の子 (ichiban shita no ko) is a more neutral, descriptive phrase. Both are common, but 末っ子 is more idiomatic.
She is the youngest in her family.
The youngest child is always the center of the family.
The youngest child is still in elementary school.
彼は末子として財産を相続した。
He inherited the property as the youngest child.
He is the youngest on the team.
The youngest member is 18 years old.
Formal term for 'youngest', often used in official contexts like 'youngest ever' or 'youngest member of an organization'. It emphasizes the record or status.
He participated in the Olympics as the youngest ever.
A slightly more casual or conversational way to say 'youngest in age', literally 'age is the lowest'.
I'm the youngest in this class.
He's the youngest (most junior) so he's not used to the work yet.
Colloquial term for the lowest-ranking or most junior person. 下っ端 means 'underling' or 'lowest rank'.
Since I'm the youngest (most junior), I just do odd jobs.
Formal term for the youngest or most junior member, often used in business or sports contexts.
The youngest researcher is leading the project.
I'm the youngest among my siblings.
As above, 末っ子 inherently means youngest child, so it can be used here as well.
Since I'm the youngest, I was often spoiled.
一番下の弟は医者です。
My youngest brother is a doctor.
最年少の社長として注目されている。
He is attracting attention as the youngest company president.