Let's assume that I want to define the concept of injective function:

A function f is said to be injective if each element of the domain has at most one image.

which would become something like that:


But is there something like 少なくとも一個 (at least one) whose meaning would be at most one. By something like 少なくとも I mean that the word order should be the same (ie. (expression whose meaning is “at most”)一個).

  • Even if I used the [mathematics] tag, I also welcome non mathematical jargon. Commented Mar 6, 2016 at 5:41
  • @choco, “has” sorry for the confusing typo. Commented Mar 6, 2016 at 5:59

1 Answer 1


In the context of mathematics, 「高々 (or たかだか) 一個」 is the standard expression.

高々 can also be used in non-technical context, but it's somewhat formal. In daily conversations, we'd say "多くて(も)一個" or "最大で一個", etc.

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