Translation guide
The English word "so" has many functions: showing result, degree, purpose, connecting ideas, and more. This guide breaks down each use and gives natural Japanese equivalents.
Expressing a consequence or logical conclusion
The most common way to say 'so' as a result. Used in both spoken and written Japanese.
It's raining, so I won't go out.
Polite or formal 'so'. Often used after nouns or na-adjectives, or as a softer connector.
Formal, written 'therefore'. Used in academic or business contexts.
Expressing extent or intensity leading to a result
Pattern: 'so [adjective/adverb] that...'. とても means 'very', and ので gives the reason/result.
Expressing intention or goal
Used after verbs to mean 'so that'. Often with potential or negative form.
I took a note so that I wouldn't forget.
Continuing a story or explanation
Casual connector meaning 'and so' or 'and then'. Used in conversation.
Intensifying an adjective or adverb
Very common casual intensifier. 'So' as in 'so good'.
Showing understanding or confirmation
Polite 'Is that so?' or 'I see'. Used to acknowledge information.
Giving an approximate amount
Expressing similarity or addition
Particle meaning 'also' or 'too'. Used in 'so do I' constructions.
I'll go too. / So will I.
English uses 'so' as a filler or discourse marker ('So, I was thinking...'). In Japanese, starting a sentence with だから or それで can sound abrupt. Often it's better to omit it or use a softer connector like あのう or ええと.
So, I have a question.
だから is casual and direct; なので is softer and more polite. In formal writing, したがって or そのため are preferred.
Tomorrow is a day off, so I can stay up late.
このデータは不十分である。したがって、結論を出すのは難しい。
This data is insufficient; therefore, it is difficult to draw a conclusion.
I was so tired that I went to bed immediately.
Emphasizes an excessive degree. 'So... that...' with a nuance of 'too much'.
It was so hot that I turned on the air conditioner.
Attach to verb stem or adjective stem to mean 'so... that (negative result)'. Casual.
I ate so much that my stomach hurts.
Used with volitional verbs to express purpose. More direct intention than ように.
I went to Japan so that I could study Japanese.
I had a drinking party yesterday, and so I have a hangover today.
More neutral 'and then'. Can also mean 'and' in lists.
He stood up, and then began to speak.
このラーメン、すごくおいしい！
This ramen is so delicious!
Standard 'very'. Slightly more formal than すごく.
I'm so happy.
Very casual, slangy 'so'. Common among younger speakers.
I'm so tired.
A: Tomorrow is a day off. B: Is that so?
Casual 'Oh, I see' or 'Is that so?'. Shows interest.
A: I got a girlfriend. B: Oh, really!
More formal than くらい. Also means 'about'.
I waited for an hour or so.
Literally 'me too' or 'so am I'. Polite.
A: I'm tired. B: So am I.