Translation guide
How to express that an idea is excellent in Japanese, from casual agreement to formal praise.
The speaker wants to express that an idea is very good, clever, or outstanding.
A natural, polite way to say 'That's a good idea.' Adding とても (very) makes it stronger: とてもいいアイデアですね.
That's a really excellent idea.
The speaker wants to show strong agreement and enthusiasm for a proposed idea.
A very common casual way to say 'That's a good idea!' or 'Sounds great!'
いいアイデア is the most basic and neutral way to say 'good idea.' 素晴らしいアイデア is stronger, closer to 'excellent idea' or 'wonderful idea.' Both are natural and polite with ですね.
That's a good idea.
素晴らしい means 'wonderful' or 'splendid.' This is a common and natural way to say 'excellent idea' in both casual and polite contexts.
What an excellent idea!
名案 means 'excellent idea' or 'brilliant plan.' It sounds a bit more formal or literary, but is still used in conversation.
That's an excellent idea.
A casual, loanword expression. Common among younger people or in informal settings.
Nice idea! Let's go with that.
妙案 means 'ingenious idea' or 'clever plan.' It is somewhat literary and less common in daily speech.
That's a clever idea.
How about going to a movie tomorrow? — That's a great idea!
A shorter, very casual way to say 'Good idea!' or 'Nice!' Often used in texting or quick replies.
Let's go for lunch. — Good idea!
Literally 'I agree!' or 'Seconded!' Used to express strong approval of an idea.
I'm all for that idea!
That's an excellent idea.
While 優秀な (ゆうしゅうな) means 'excellent,' it is usually used for people's abilities or performance, not for ideas. Saying 優秀なアイデア sounds unnatural. Stick to 素晴らしい or いい.