Translation guide
The English word 'idea' covers a wide range of meanings, from a sudden thought or plan to a general notion or impression. In Japanese, different words and patterns are used depending on the nuance.
Expressing a concrete idea, plan, or suggestion that you have in mind.
The most common and versatile word for 'idea' as a thought or plan. Can be used in most situations.
いい考えですね。
That's a good idea.
何か考えがありますか。
Do you have any ideas?
Loanword from English, often used for creative or innovative ideas, especially in business or brainstorming contexts.
Often used for a proposal, plan, or draft. Common in formal or business settings.
Refers to a conception or original idea, often used in creative or intellectual contexts. Somewhat formal.
Expressing a personal opinion, belief, or way of thinking.
Expressing a general understanding, vague notion, or impression about something.
Expressing the main point, purpose, or intention behind something.
Means 'gist', 'point', or 'purpose'. Often used in formal contexts.
Expressing that you don't know or have no clue about something.
Standard way to say 'I have no idea' (literally 'I don't understand at all').
彼がどこにいるか全くわからない。
I have no idea where he is.
考え is the general native word for 'idea' as a thought, plan, or opinion. アイデア is a loanword often associated with creativity, innovation, or brainstorming. In business, アイデア is very common, but 考え is safer in formal writing.
新しいアイデアを考えてください。
Please think of a new idea.
While アイデア is understood, using it for every 'idea' can sound unnatural. For opinions or general thoughts, 考え is preferred.
新しいアイデアを出してください。
Please come up with new ideas.
彼は面白いアイデアを持っている。
He has an interesting idea.
What do you think about this idea/proposal?
代替案を考えましょう。
Let's think of an alternative idea.
この小説の着想はどこから得たのですか。
Where did you get the idea for this novel?
Works for both 'idea' as a thought and as an opinion. Very natural.
私の考えでは、それは間違いです。
In my opinion, that's wrong.
彼は考えが古い。
He has old-fashioned ideas.
Directly means 'opinion'. Use when you want to emphasize a personal viewpoint rather than a plan.
皆さんの意見を聞かせてください。
Please let me hear your ideas/opinions.
Refers to ideology, thought system, or philosophical ideas. Formal.
彼の思想は複雑だ。
His ideas/ideology are complex.
Means 'concept' or 'notion'. Suitable for abstract or general ideas.
時間の概念が違う。
They have a different idea of time.
その概念は理解しにくい。
That idea/concept is hard to understand.
Often used for a mental image or impression. Very common in casual speech.
どんなイメージですか。
What kind of idea/image do you have?
彼のイメージがわかない。
I can't get an idea of what he's like.
Means 'feeling' or 'impression'. Used when 'idea' means a vague sense or atmosphere.
どんな感じの店ですか。
What kind of idea/feeling do you get from the shop?
この会議の趣旨を説明してください。
Please explain the idea/purpose of this meeting.
Means 'intention' or 'aim'. Good when 'idea' refers to what someone intends to do.
彼の意図がわからない。
I don't understand his idea/intention.
Literally 'what (you) want to say'. Used to ask for the main idea or point in conversation.
結局、何が言いたいの？
So, what's your idea/point?
Emphatic way to say 'I have absolutely no idea'. More colloquial.
その話はさっぱりわからない。
I have no idea what you're talking about.
Literally 'can't even guess'. Stronger than わからない.
どうすればいいか見当もつかない。
I have no idea what to do.
来るとは全く知らなかった。
I had no idea you were coming.