Japanese Grammar

Saying 'Because': から and ので

To give a reason for something, Japanese has two main words: kara (から) and node (ので). They both mean 'because', but they are used in very different situations.

Subjective vs Objective Reasons

から (kara) is subjective. It emphasizes your personal reason, opinion, or decision. It is direct and can sometimes sound a bit strong or selfish if used as an excuse.

ので (node) is objective. It presents the reason as a natural, unavoidable fact. Because it sounds less personal, it is considered softer, more polite, and is preferred in business or when making excuses.

How to connect them

Using から (kara)
Verbs / I-Adjectives
→Plain Form + から
E.g., 食べるから (taberu kara - because I eat)
Nouns / Na-Adjectives
→Add だ (da) + から
E.g., 好きだから (suki da kara - because I like it)
Polite speech
→Masu/Desu + から
You can attach kara directly to polite forms (e.g., 食べますから)
Using ので (node)
Verbs / I-Adjectives
→Plain Form + ので
E.g., 食べるので (taberu node - because I eat)
Nouns / Na-Adjectives
→Add な (na) + ので
IMPORTANT: Da changes to Na! E.g., 好きなのです -> 好きなので
Polite speech
→DO NOT use Masu/Desu + ので
Node usually attaches ONLY to plain forms, even in polite sentences.

Comparing the Nuance

時間がありませんから、行きません。
Jikan ga arimasen kara, ikimasen.
I don't have time, so I'm not going. (Direct, personal decision)
時間がないので、行けません。
Jikan ga nai node, ikemasen.
Because there is no time, I cannot go. (Objective fact, sounds like a polite excuse)
雨だから、タクシーに乗ろう。
Ame da kara, takushii ni norou.
It's raining, so let's take a taxi. (Noun + da kara)
雨なので、遅れました。
Ame na node, okuremashita.
Because of the rain, I was late. (Noun + na node - apologizing)
静かなので、この図書館が好きです。
Shizuka na node, kono toshokan ga suki desu.
Because it is quiet, I like this library. (Na-adjective + na node)
頭が痛いので、先に帰ってもいいですか。
Atama ga itai node, saki ni kaette mo ii desu ka.
I have a headache, so may I leave early? (node + asking permission — the classic polite combination)

Teacher's Advice

Making Excuses

If you are apologizing to your boss for being late, NEVER use 'kara'. 'Densha ga okureta kara...' sounds like 'The train was late, so it's not my fault!'. Instead, use 'node': 'Densha ga okureta node...' This sounds like 'Due to the objective fact of the train delay, I am unfortunately late.'

The Connection Mistake That Gives You Away

The single most common written error I correct: 好きだので / 雨だので. The だ must become な before ので (好きなので・雨なので), while before から it stays だ (好きだから・雨だから). If you remember only one thing from this page, remember: だから but なので.

JLPT Exam Patterns

  • •Remembering the connection for nouns/na-adjectives: だから (da kara) vs なので (na node) (N5/N4)
  • •Choosing 'node' over 'kara' in polite reading comprehension passages (N4)
  • •Ordering sentences: Reason + kara/node + Result (N5)
  • •ので + permission/request (〜ので、〜てもいいですか) as a set phrase in listening dialogues (N4)
  • •Trap option だので — always wrong; the tested connection is なので (N5/N4)

Related Grammar

Saying 'When': 〜時 (toki)
Grammar guide →
Conditionals: 〜たら (~tara)
Grammar guide →
Explanation & Emphasis: 〜んです / 〜のです
Grammar guide →
See the full JLPT N5 grammar roadmap →

Master Reasons

Practice the difference between da kara and na node with our interactive quizzes.

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