Translation guide
The English phrase "one matter" is used to refer to a single issue, topic, or affair. In Japanese, it is rarely translated literally. Instead, the natural expression depends on context: whether you are referring to a specific topic, a problem, a formal agenda item, or simply counting things.
Referring to one specific subject, point, or topic in a conversation or discussion.
The most common and versatile way to say 'one thing' or 'one matter'. It can be used in many contexts, from casual to formal.
I have just one matter to ask about.
There's one matter that's bothering me.
More formal and explicit, often used in business or official contexts to refer to a specific matter or case.
I will report on one matter.
Use when 'matter' implies a problem or issue that needs solving.
One matter has been resolved.
Very formal, used in legal or administrative documents for an item on an agenda or a specific point.
Add one matter to the agenda.
When you need to count or enumerate matters, often in formal or business settings.
The counter 件 (けん) is the standard way to count matters, cases, or incidents. '1件' means 'one matter'.
Today there was one matter of complaint.
One matter of an accident was reported.
The generic counter つ can also be used for matters in less formal counting.
Referring to a private matter or something of personal concern.
The phrase 'one matter' is rarely translated directly as '一つの事柄 (ことがら)' or '一つの案件 (あんけん)' in natural Japanese. These sound stiff and are usually replaced by more context-appropriate words like 件, 問題, or simply 一つ.
There's one matter I'd like to ask you about.
When counting matters in business or formal contexts, use the counter 件 (けん). For general counting, つ is sufficient. Avoid using 事 (こと) as a counter; it is not standard.
やるべきことが1つ残っている。
There is one matter left to do.