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Because (Polite) | ~ので

Because ~ (softer, more polite than から)

N4Verb/い-adj (plain) + ので | な-adj/Noun + なので

Step 33 of 66 in the N4 study path

N4Japanese Grammar

Because ~ (softer, more polite than から)

Formation:Verb/い-adj (plain) + ので | な-adj/Noun + なので

Because with ので

ので also means "because," just like から. It sounds softer and more polite, so it's the one you'll hear more in formal situations and when talking to strangers. Our lesson on conjunctions covers both ので and から with more context.

How to Connect

Verbs and い-Adjectives

Use the plain form + ので:

  • 雨(あめ)が降(ふ)るので (because it will rain)
  • 寒(さむ)いので (because it's cold)

な-Adjectives and Nouns

Add な before ので:

  • 静(しず)かなので (because it's quiet)
  • 誕生日(たんじょうび)なので (because it's my birthday)

With Polite Form

ので can also follow the polite form (ますので, ですので) for extra formality. This is common in announcements and business settings.

ので vs から

ので から
Tone Soft, objective Direct, subjective
Formality More polite More casual
Best for Explanations, apologies, requests Casual conversation, strong opinions

Example Sentences

Tap any sentence to hear it read aloud.

Speed
  1. 今日(きょう)は誕生日(たんじょうび)なので、ケーキを食(た)べたいです。

    Because today is my birthday, I want to eat cake.

  2. 危険(きけん)ですので、エスカレーターで歩(ある)かないでください。

    Because it is dangerous, please don't walk on the escalator.

  3. 今日(きょう)は良(い)い天気(てんき)なので、ピクニックに行(い)きませんか。

    It's nice weather today, so why don't we go for a picnic?

  4. 電車(でんしゃ)が遅(おく)れたので、遅刻(ちこく)しました。

    I was late because the train was delayed.

  5. 道(みち)が混(こ)んでいるので、遅(おく)れます。

    The roads are busy, so I'll be late.

  6. まだ子(こ)どもなので、お酒(さけ)は飲(の)めません。

    He's still a child, so he can't drink.

  7. 寒(さむ)いので、窓(まど)を閉(し)めてもいいですか。

    It's cold — may I close the window?

  8. 熱(ねつ)があるので、今日(きょう)は休(やす)みます。

    I have a fever, so I'll take today off.

Quiz Time

Because (Polite) | ~ので

6 questions to test what you actually remember.

3 multiple choice2 fill in the blank1 error correction

Want to mix this with other grammar points? Practice in the full Japanese Grammar Quiz.

Learn this step-by-step

See Because (Polite) | ~ので used in context, with practice, in our full lesson: