なぜなら: You use this word to give a reason. It means 'because' or 'the reason is'. You use it in formal speaking and writing.

Dictionary

なぜなら

You use this word to give a reason. It means 'because' or 'the reason is'. You use it in formal speaking and writing.

N3 KMT5FormalStandardDiscourse MarkerMixedDiscourse Markers And ReformulationGrammar

Sentence + 。 + なぜなら + Clause + からだ/ためだPrimary

You use this word to give a reason. It means 'because' or 'the reason is'. You use it in formal speaking and writing.

会議は中止になりました。なぜなら、主要な参加者が来られなくなったからです。

The meeting was cancelled. This is because the main participants became unable to attend.

FormalPastAffirmativeClause InitialDeclarativeWork & Career

この製品は子供にはお勧めできません。なぜなら、小さな部品が含まれており、誤飲の危険があるためです。

This product is not recommended for children. The reason is that it contains small parts, posing a risk of accidental ingestion.

PoliteNon PastNegativeClause InitialProhibitionDaily Life Medicine & Health

彼はその計画に反対した。なぜなら、リスクが大きすぎると判断したからだ。

He opposed the plan. It's because he judged the risks to be too great.

FormalPastAffirmativeClause InitialDeclarativeBusiness & Finance

温暖化は深刻な問題です。なぜなら、海面上昇や異常気象を引き起こすからです。

Global warming is a serious problem. This is because it causes sea-level rise and abnormal weather patterns.

FormalNon PastAffirmativeClause InitialDeclarativeScience & Math Nature & Environment

私は留学を決意しました。なぜなら、新しい文化に触れることが、自分の成長に不可欠だと考えたからです。

I decided to study abroad. The reason is that I believed experiencing a new culture was essential for my own growth.

PolitePastAffirmativeClause InitialDeclarativeEducation Culture & Traditions

This is different from 'datte'. 'Datte' is casual. You use it for excuses. This is also different from 'tsumari'. 'Tsumari' means 'in other words'. You use it to sum up something.

Don't use this when you don't say "...because" or "...for that reason" at the end. For example, saying "Nazenara, ame ga futta." sounds wrong.

Use this when you want to explain why something is true. It tells people you will give a clear reason. You use it after you say something, then you explain why.

Contrasts with(1)

だって

This word gives a reason. It can sound like 'because' or 'but'. You use it when you explain something casually.

More formal alternatives(1)

だって

This word gives a reason. It can sound like 'because' or 'but'. You use it when you explain something casually.

〜から

This word tells you the reason for something. It is like saying 'because' or 'so' in English. It connects an action to its cause.

〜ので

Indicates a reason or cause. It is generally perceived as softer and more polite than 'から', presenting the reason as an objective fact or situation rather than a subjective judgment. It is often used when making excuses, explanations, or gentle requests.

〜なら

You use this word to talk about a topic. You can give advice about it. You can also ask a question about it.

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Dictionary

なぜなら

You use this word to give a reason. It means 'because' or 'the reason is'. You use it in formal speaking and writing.

N3 KMT5FormalStandardDiscourse MarkerMixedDiscourse Markers And ReformulationGrammar

Sentence + 。 + なぜなら + Clause + からだ/ためだPrimary

You use this word to give a reason. It means 'because' or 'the reason is'. You use it in formal speaking and writing.

会議は中止になりました。なぜなら、主要な参加者が来られなくなったからです。

The meeting was cancelled. This is because the main participants became unable to attend.

FormalPastAffirmativeClause InitialDeclarativeWork & Career

この製品は子供にはお勧めできません。なぜなら、小さな部品が含まれており、誤飲の危険があるためです。

This product is not recommended for children. The reason is that it contains small parts, posing a risk of accidental ingestion.

PoliteNon PastNegativeClause InitialProhibitionDaily Life Medicine & Health

彼はその計画に反対した。なぜなら、リスクが大きすぎると判断したからだ。

He opposed the plan. It's because he judged the risks to be too great.

FormalPastAffirmativeClause InitialDeclarativeBusiness & Finance

温暖化は深刻な問題です。なぜなら、海面上昇や異常気象を引き起こすからです。

Global warming is a serious problem. This is because it causes sea-level rise and abnormal weather patterns.

FormalNon PastAffirmativeClause InitialDeclarativeScience & Math Nature & Environment

私は留学を決意しました。なぜなら、新しい文化に触れることが、自分の成長に不可欠だと考えたからです。

I decided to study abroad. The reason is that I believed experiencing a new culture was essential for my own growth.

PolitePastAffirmativeClause InitialDeclarativeEducation Culture & Traditions

This is different from 'datte'. 'Datte' is casual. You use it for excuses. This is also different from 'tsumari'. 'Tsumari' means 'in other words'. You use it to sum up something.

Don't use this when you don't say "...because" or "...for that reason" at the end. For example, saying "Nazenara, ame ga futta." sounds wrong.

Use this when you want to explain why something is true. It tells people you will give a clear reason. You use it after you say something, then you explain why.

Contrasts with(1)

だって

This word gives a reason. It can sound like 'because' or 'but'. You use it when you explain something casually.

More formal alternatives(1)

だって

This word gives a reason. It can sound like 'because' or 'but'. You use it when you explain something casually.

〜から

This word tells you the reason for something. It is like saying 'because' or 'so' in English. It connects an action to its cause.

〜ので

〜なら

You use this word to talk about a topic. You can give advice about it. You can also ask a question about it.

Track your mastery

Kumi's KMT system tracks your mastery across kanji, vocabulary, grammar, and reading. Create a free account to use it on 220,000+ concepts.

なぜなら

Patterns1

Meaning

Examples5

Contrasts1

Restrictions1

Discourse Function1

Compare with2

Contrasts with(1)

More formal alternatives(1)

Prerequisites3

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なぜなら

Patterns1

Meaning

Examples5

Contrasts1

Restrictions1

Discourse Function1

Compare with2

Contrasts with(1)

More formal alternatives(1)

Prerequisites3

Track your mastery