Translation guide
The English phrase "number one" can refer to being the best, the first in a sequence, or oneself. This guide covers natural Japanese expressions for each meaning.
Expressing that someone or something is the best, top, or most important.
Referring to the first item or person in a list, order, or series.
Referring to oneself, especially in the context of self-interest.
The English idiom 'look out for number one' does not translate directly to ナンバーワン. Use expressions about self-priority instead.
The most common and versatile way to say 'number one' meaning 'the best' or 'first in rank'. Can be used as a noun or adverb.
彼はクラスで一番だ。
He is number one in the class.
健康が一番大切です。
Health is the number one priority.
A direct loanword from English, commonly used in casual contexts, rankings, and entertainment. Sounds more emphatic or trendy.
この曲がナンバーワンになった。
This song became number one.
Formal term for 'first place' or 'number one position', used in official rankings, competitions, and news.
彼は世界ランキング第一位だ。
He is number one in the world rankings.
Means 'top' and is often used in business, sports, and rankings. Slightly less direct than 'number one' but very common.
売上トップの商品
the number one selling product
Literally 'number one' in a sequence. Use when counting or listing items.
一番目の問題は難しい。
The number one problem is difficult.
Formal or written way to say 'first' in a series, often used in titles or structured lists.
第一の理由はコストです。
The number one reason is cost.
Means 'oneself'. The phrase 'look out for number one' can be translated naturally by emphasizing self-interest.
結局は自分自身が一番大事だ。
In the end, you have to look out for number one.
The concept of 'number one' meaning 'self' is often expressed with 自分 (self) plus a phrase about priority or importance.
自分のことを第一に考える。
Think of yourself as number one.