Translation guide
Expressing that something is not needed, required, or essential. Japanese offers several common words and phrases depending on the nuance: objective lack of necessity, personal lack of need, or the idea of being superfluous.
To state that something is not necessary, often in a factual or general sense.
A direct and common adjective/noun meaning 'unnecessary' or 'not needed'. Used in both spoken and written Japanese. Can modify nouns with な.
This document is unnecessary.
Let's stop worrying unnecessarily.
A very common casual phrase meaning 'not necessary'. Literally 'there is no need'. Often used in speech.
You don't need to reply right now.
There's no need to hurry that much.
Slightly more formal version of 必要ない, with the topic particle は. Emphasizes the lack of necessity.
There's no need to inform him.
Formal/written word meaning 'unnecessary' or 'unneeded'. Often used in official contexts, signs, or instructions.
Please throw away unnecessary items.
This feature is unnecessary.
To express that you personally have no need for something, often in a polite or casual refusal.
Casual phrase meaning 'I don't need it' or 'I don't want it'. From the verb 要る (to need). Very common in daily conversation.
I don't need a bag.
I don't need money anymore.
Kanji version of いらない, same meaning. Slightly more formal in writing but still casual in speech.
I threw away the things I don't need.
Polite way to say 'I don't need it' or 'it's not necessary'. Often used in customer service or formal situations.
I don't need a receipt.
To describe something that is excessive, redundant, or not essential.
Adjective/na-adjective meaning 'extra', 'excessive', 'unnecessary'. Often implies something is unwanted or a nuisance.
Don't say unnecessary things.
Unnecessary worry is useless.
Means 'wasteful' or 'useless'. Can be used for unnecessary actions or things that serve no purpose.
Formal word meaning 'redundant' or 'verbose', often used for writing or speech that is unnecessarily long.
To indicate that something is optional or can be left out.
Common phrase meaning 'it's okay not to have/do'. Expresses that something is not required.
Sugar is not necessary (you can do without it).
You don't have to force yourself to come.
More formal version of なくてもいい, meaning 'it doesn't matter if not present/done'.
A reply is not necessary.
不必要 (fuhitsuyou) is a general adjective for 'unnecessary'. 不要 (fuyou) is more formal and often used in written or official contexts. いらない (iranai) is casual and personal, meaning 'I don't need it'. Use いらない when refusing something offered to you.
Avoid unnecessary expenses.
Please dispose of unnecessary documents.
I don't need chopsticks.
Avoid directly translating 'unnecessary' as 不必要 in casual speech; it can sound stiff. In daily conversation, いらない or 必要ない are more natural for personal needs.
Let's stop making unnecessary efforts.
この説明は冗長だ。
This explanation is unnecessarily long.