Japanese Grammar 19 – Giving Reasons: から & ので · N5

📋 Formation Reference — Giving Reasons: から & ので

Two ways to say "because" in Japanese. Press ▶ to hear examples.

から — DIRECT / ASSERTIVE REASON

Form	+ から	Meaning
たべる plain present	たべるから taberu kara	because (I) eat
たべた plain past	たべたから tabeta kara	because (I) ate
たべない plain negative	たべないから tabenai kara	because (I) don't eat
たべます polite present	たべますから tabemasu kara	because (I) eat (polite)

ので — SOFT / EXPLANATORY REASON

Form	+ ので	Meaning
たべる verb plain	たべるので taberu node	since (I) eat
しずかな na-adj + な	しずかなので shizuka na node	since it is quiet
がくせいな noun + な	がくせいなので gakusei na node	since (I am) a student

KEY DISTINCTION

[reason] から [result]

[reason] kara [result]

→ Direct, assertive: "because …" (casual / personal reason)

[reason] ので [result]

[reason] node [result]

→ Softer, explanatory: "since …" (apologies, requests, declining)

🗣 Example Sentences

See から and ので in context. Press ▶ to hear each sentence.

USING から

Example

あしたはしけんだから、きょうはべんきょうする。

Ashita wa shiken da kara, kyou wa benkyou suru.

Tomorrow is an exam, so I'll study today.

しけんだからべんきょうする

shiken da kara benkyou suru

→ "It's an exam, so I'll study."

Example

あめがふっているから、かさをもっていきます。

Ame ga futte iru kara, kasa wo motte ikimasu.

It's raining, so I'll take an umbrella.

Example

おいしかったから、もういっかいたべたい。

Oishikatta kara, mou ikkai tabetai.

It was delicious, so I want to eat it again.

Example

にほんがすきだから、にほんごをべんきょうしています。

Nihon ga suki da kara, nihongo wo benkyou shite imasu.

Because I like Japan, I study Japanese.

USING ので

Example

びょうきなので、やすみます。

Byouki na node, yasumimasu.

Since I'm sick, I'll rest.

びょうきなのでやすみます

byouki na node yasumimasu

→ noun + な + ので (soft, polite explanation)

Example

じかんがないので、タクシーでいきましょう。

Jikan ga nai node, takushii de ikimashou.

Since there's no time, let's take a taxi.

Example

すみません、よていがあるので、いけません。

Sumimasen, yotei ga aru node, ikemasen.

Sorry, I have plans so I can't go.

Example

つかれたので、はやくねます。

Tsukareta node, hayaku nemasu.

Since I'm tired, I'll go to bed early.

📋 Quick-Reference Cheatsheet ▼

から attaches to plain OR polite form

✅ PLAIN FORM

さむいから、うちにいる。

Samui kara, uchi ni iru.

It's cold, so I'll stay home.

Plain form + から — casual register.

✅ POLITE FORM

さむいですから、うちにいます。

Samui desu kara, uchi ni imasu.

It's cold, so I'll stay home.

Polite form + から — more formal register.

ので requires PLAIN form — な for nouns and な-adjectives

✅ CORRECT

びょうきなので、やすみます。

Byouki na node, yasumimasu.

Since I'm sick, I'll rest.

Noun + な + ので — な is required.

❌ COMMON MISTAKE

びょうきので、やすみます。

Byouki node, yasumimasu.

(Intended: Since I'm sick, I'll rest.)

Noun/na-adj must use な before ので. Never skip it.

Use ので for apologies, declining, and requests

✅ SOFTER (ので)

よていがあるので、いけません。

Yotei ga aru node, ikemasen.

I have plans, so I can't go.

ので softens the refusal — sounds considerate.

⚠ PUSHY (から)

よていがあるから、いけません。

Yotei ga aru kara, ikemasen.

I have plans so I can't go.

から is more blunt — can sound curt when declining.

Use から for personal reasons in casual conversation

✅ CASUAL (から)

にほんがすきだから、べんきょうしてる。

Nihon ga suki da kara, benkyou shiteru.

Because I like Japan, I'm studying.

から is natural for personal feelings in casual speech.

✅ ALSO OK (ので)

にほんがすきなので、べんきょうしています。

Nihon ga suki na node, benkyou shite imasu.

Since I like Japan, I'm studying.

ので works here too — note な after suki (na-adjective).

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B — Listen & Choose the Meaning

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D — Listen & Write in Romaji

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💡 Tip: Long vowels → double the vowel (おう = ou / oo). Double consonants → write them twice (きって = kitte).

📖 Grammar Deep Dive ▼

Why ので sounds politer than から

から directly asserts a reason: "because X, therefore Y." It puts the reason forward confidently, which can feel blunt.

ので presents the reason as shared context — a soft continuation. It implies "given the situation …" which sounds considerate and less pushy. This is why ので is the preferred choice in polite situations, apologies, and declining invitations.

[reason] ので [soft result]

[reason] node [result]

→ "Given that … / Since …" (explaining, not demanding)

つかれたので、はやくねます。

Tsukareta node, hayaku nemasu.

Since I'm tired, I'll go to bed early.

から at sentence end: さむいからです

から can end a sentence to answer a "why" question directly. The copula です follows to keep it polite.

• Q: なぜやすむんですか。(Why are you resting?)
• A: びょうきだからです。(It's because I'm sick.)

ので cannot be used this way — ので must connect to a following clause and cannot stand alone at sentence end.

[reason] からです

[reason] kara desu

→ "It is because …" (polite sentence-final answer)

すきだからです。

Suki da kara desu.

It's because I like it.

ので cannot end a sentence alone

Unlike から, ので must always link to a result clause. You cannot say ×びょうきなのでです — this is ungrammatical.

ので always expects something to follow: an action, request, or consequence. If you need a sentence-final reason, use から / からです.

❌ びょうきなのでです。

✗ Byouki na node desu.

Ungrammatical — ので cannot end a sentence.

✅ びょうきだからです。

Byouki da kara desu.

It's because I'm sick. (correct sentence-final form)

だから / ですから as sentence-initial connectors

Both だから and ですから work at the start of a sentence to mean "That's why …" or "So …". They connect to the previous sentence as a reason connector.

• だから — casual
• ですから — polite

These are not the same as mid-sentence から or ので — they are standalone connectors.

だから [result sentence]

da kara [result]

→ "That's why …" / "So …" (connecting two sentences)

あめがふっています。だから、かさをもっていきます。

Ame ga futte imasu. Da kara, kasa wo motte ikimasu.

It's raining. That's why I'll take an umbrella.

📝 Key Vocabulary ▼

Japanese	Romaji	English
しけん	shiken	exam, test
あめ	ame	rain
かさ	kasa	umbrella
びょうき	byouki	illness, sickness
タクシー	takushii	taxi
よてい	yotei	plans, schedule
つかれる	tsukareru	to get tired
はやい	hayai	early, fast
いく	iku	to go
やすむ	yasumu	to rest, take a day off