How to Say “Because” in Japanese | Using ~から with Short Form Verbs, Adjectives, and Nouns

level1 (N5)
How to Say “Because” in Japanese | Using ~から with Short Form Verbs, Adjectives, and Nouns
Source: gokigen japanese official YouTube Channel

Introduction

Want to say things like “Because I’m tired,” “Because it’s cold,” or “Because I have an exam” in Japanese?

The most natural and useful way to express a reason in Japanese is by using:

~から = because 〜

In this article, you’ll learn how to use 〜から with verbs, adjectives, and nouns in short (plain) form, so you can explain reasons clearly in Japanese conversation.


1. Basic Structure

Grammar Pattern: [Verb/Adjective/Noun in short (plain) form] + から

EnglishJapanese
Because I’m tired, I’ll sleep early.つかれたからはやます。
Because it’s cold, I’ll close the window.さむからまどめます。
Because it’s the weekend, I’m free.週末しゅうまつだからひまです。

In Japanese, you can use the conjunction から to express the reason or cause of something. It is attached to the short form of verbs, adjectives, or nouns to indicate “because”.


2. How to Conjugate Before から

To express “because” using から, follow these steps:

  1. Conjugate the verb/adjective/noun in its short [plain] form (affirmative or negative, present or past).
  2. Add から after the short form.

Verb

U-verb (example: 行く, to go)

typeshort [plain] form~から
affirmative行くから
negative行かない行かないから
affirmative, past行った行ったから
negative, past行かなかった行かなかったから

Ru-verb (example: 食べる, to eat)

typeshort [plain] form〜から
affirmativeべる食べるから
negative食べない食べないから
affirmative, past食べた食べたから
negative, past食べなかった食べなかったから

Irregular verb (する and くる)

typeshort [plain] form〜から
affirmativeするするから
negativeしないしないから
affirmative, pastしたしたから
negative, pastしなかったしなかったから

typeshort [plain] form〜から
affirmativeくるくるから
negativeこないこないから
affirmative, pastきたきたから
negative, pastこなかったこなかったから

い-Adjective (example: さむい, cold)

typeshort [plain] form〜から
affirmativeさむいさむいから
negativeさむくないさむくないから
affirmative, pastさむかったさむかったから
negative, pastさむくなかったさむくなかったから

な-Adjective (example: べんり, convenient)

typeshort [plain] form〜から
affirmativeべんりだべんりだから
negativeべんりじゃないべんりじゃないから
affirmative, pastべんりだったべんりだったから
negative, pastべんりじゃなかったべんりじゃなかったから

Noun (example: あさ, morning)

typeshort [plain] form〜から
affirmativeあさ朝だから
negative朝じゃない朝じゃないから
affirmative, past朝だった朝だったから
negative, past朝じゃなかった朝じゃなかったから

gokigen penguin
gokigen penguin

3. Example Sentences

つかれていたから、コーヒーをみました。
Because I was tired, I drank coffee.


あめっているからかけません。
Because it’s raining, I won’t go out.


あまりおかねがないから映画えいがません。
Because I don’t have much money, I won’t see a movie.


日曜日にちようびだから、デパートはんでいます。
Because it’s Sunday, the department store is crowded.


4. Practice Time!

Connect the reasons and situations using から:

ReasonSituationResult
あめっているかけません雨が降っているから、出かけません。
Because it’s raining, I won’t go out.
JLPTの試験しけんがある勉強べんきょうしますJLPTの試験があるから、勉強します。
Because I have the JLPT exam, I will study.
いそがしいあそびにいきません忙しいから、遊びにいきません。
Because I’m busy, I won’t go out (to play/hang out).
天気てんきがいい洗濯せんたくします天気がいいから、洗濯します。
Because the weather is good, I will do laundry.

5. Common Mistakes to Avoid

❌ Wrong✅ Correct
きれいからきれいだから (because it is beautiful)
学生がくせいから学生だから (because someone is a student)

💡 Use the short (plain) form before から.


6. Bonus: “〜だから”

だから is a conjunction, similar to “so / therefore.”
It connects two sentences:

日本語にほんごはおもしろいです。だから、日本語を勉強べんきょうしています。
Japanese is interesting. So, I study Japanese.

This is different from 〜から, which attaches directly to the word before it.

Let’s compare these patterns:

  1. 日本語はおもしろいです。だから、日本語を勉強しています。
    (Conjunction: two sentences → “Therefore / So”)
  2. 日本語はおもしろいですから、日本語を勉強しています。
    (long form of おもしろい + から)
  3. 日本語はおもしろいから、日本語を勉強しています。
    (short form of おもしろい + から)
  4. 日本語はおもしろいから、日本語を勉強してる。
    (Casual + spoken contraction)

FAQ – Frequently Asked Questions

Q
What’s the difference between 〜から and 〜ので?
A

〜から is more direct and conversational.
〜ので is softer, more formal or polite.
Example:

  • お腹がすいたから食べます。 (casual)
  • お腹がすいたので食べます。 (more polite)
Q
Can I use から as a response to a question?
A

Yes, like:
A: 先週せんしゅう、どうして結婚式けっこんしきなかったの? = Why didn’t you come to the wedding last week?
B: 病気びょうきだったからです。= Because I was sick.

Q
Why do I need to add だ before から with present tense な-adjectives and nouns (like 元気だから)? Why not just 元気から?
A

That’s because the rule is “[Plain Form] + から”. The plain form, present tense affirmative for な-adjectives and nouns actually ends in だ (da) – it’s the casual version of です (desu). So, you need to include that だ before adding から. For い-adjectives (e.g., 寒い – samui) and verbs (e.g., 行く – iku), their plain forms don’t end in だ, so you just add から directly (寒いから, 行くから).

Q
If the clause before から is plain form, does the whole sentence have to be casual? Can the final verb be polite (ます/ました)?
A

It is more common for the clause right before から to be in plain form. However, the politeness of the entire sentence is decided by the final ending. So, it’s very common and natural to have a plain form reason followed by a polite main clause.

Example: 「寒いから、窓を閉めます。」(Samui kara, mado o shimemasu.) – Because it’s cold (plain), I will close the window (polite).

Q
Does から always mean “because”?
A

から has two primary meanings:

  1. From: When it follows a noun (usually indicating a starting point, time, or source). (Ex: 大阪から来ました – Oosaka kara kimashita – I came from Osaka; 3時から – San-ji karaFrom 3 o’clock). You can tell the difference by looking at what comes directly before から.
  2. Because/So: When it follows a complete clause (ending in a plain form verb, adjective, or noun+だ), it indicates a reason. (Ex: 食べたから眠い – Tabeta kara nemui – Because I ate, I’m sleepy).
Q
Can I end a sentence with just ~から, without stating the result?
A

Yes, definitely! In casual conversation, if the result or conclusion is obvious from the situation or the question asked, you can often just state the reason ending with ~から. It’s like saying “Because…” and letting the listener understand the rest.

Example:
Q: 「どうしてパーティーに来なかったの?」(Why didn’t you come to the party?)
A: 「ちょっと用事があったから。」(Chotto youji ga atta kara. – Because I had something to do…). The “…so I couldn’t come” part is implied.


Conclusion

Now you can express reasons in Japanese using:

✅ Verbs, adjectives, and nouns in short form
✅ + から to mean “because”
✅ Naturally explain situations in daily conversation

🎯 Try this: Write 3 sentences in Japanese using 〜から to explain your day!

Want to improve your Japanese with real conversations?

Our native Japanese instructors at gokigen japanese can help you perfect your pronunciation and learn real-life usage.

Whether you’re completely new to Japanese or looking to refine your skills, book a one-on-one session.


Author and Reviewer

  • gokigen japanese

    gokigen japanese is an online Japanese tutoring service launched in 2023. Flexible, interactive, and culture-rich, gokigen japanese supports learners at all levels with bilingual Japanese tutors.
    Over 1,000 students from 30+ countries have used our 300+ original materials, including grammar guides and cultural content.

    gokigen japanese was founded by Hirofumi Naramura, a Kyoto University graduate and former Project Leader at the Boston Consulting Group (2010–2020). The service has received recognition such as the Chiyoda CULTURE x TECH Award 2024 and acceptance into NEXs Tokyo, a startup program by the Tokyo Metropolitan Government.

  • Reviewer:

    Japanese native and language educator with about 10 years of experience teaching and developing courses and materials.
    She studied and taught in 5 different countries. Her most recent teaching role was at University of Pennsylvania in the U.S.
    Other than teaching all levels of Japanese in various settings from personal tutoring to college courses, she also has experience writing articles about Japanese language and culture and teaching English.
    Education: M.A. in Japanese pedagogy, Purdue University. B.A from the school of Japanese language and culture, Tsukuba University.