so; therefore; the reason for something (ものだから) – Japanese Grammar ものだから (mono dakara)

Q: What JLPT level is ものだから?

JLPT N2 — Upper-Intermediate · Academic & formal usage

Q: How do you use ものだから in a sentence?

Attach ものだから to the appropriate verb or noun form. So; therefore; the reason for something

Q: Is ものだから formal or casual Japanese?

ものだから is typically used in formal or written Japanese contexts.

ものだから

N2 GRAMMAR ⏱ 0s study 📖 0 today

mono dakara

so; therefore; the reason for something

ざるを得ない zaru o enai いきなり ikinari なお nao かねる kaneru あげく ageku に向かって ni mukatte ものなら mono nara ようでは you dewa しかも shikamo てこそ te koso にほかならない ni hoka naranai ことか koto ka をめぐって o megutte てならない te naranai に限らず ni kagirazu 及び oyobi にあたって ni atatte て以来 te irai ふうに fuu ni くせして kuse shite ざるを得ない zaru o enai いきなり ikinari なお nao かねる kaneru あげく ageku に向かって ni mukatte ものなら mono nara ようでは you dewa しかも shikamo てこそ te koso にほかならない ni hoka naranai ことか koto ka をめぐって o megutte てならない te naranai に限らず ni kagirazu 及び oyobi にあたって ni atatte て以来 te irai ふうに fuu ni くせして kuse shite

🃏 Flashcard

ものだから

mono dakara

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so; therefore; the reason for something

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📊 Pattern Stats

JLPT Level N2

Upper-Intermediate · Academic & formal usage

Reading mono dakara

Post ID 51064

Patterns today 0

0 / 10 daily goal

📝 Usage Notes

so; therefore; the reason for something

📖 How to use it

Explains a reason or cause in a way that sounds apologetic or self-justifying, often to soften bad news or an excuse.

Attaches to Attach to the plain past form of verbs and adjectives (e.g., 言った, 行った, 暑かった), or to the plain non-past for adjectives (e.g., 寒い), and to nouns with な (e.g., 学生な). For verbs and adjectives, the form is the plain past or plain present; for nouns and な-adjectives, use な before ものだから.

ものだから is used to give the reason for something, but with a nuance that the speaker feels the need to justify themselves. It often sounds like you are apologizing or explaining why you did something that may have caused trouble. It connects the reason to the result in a way that implies 'because of this, the result happened, and I hope you understand.'

In conversation, it is more natural when the result is something negative or inconvenient. For example, you might say 電車が遅れたものだから to explain why you are late. It can sound a bit formal or stiff in casual chat, so it's common in spoken Japanese when you're being careful or polite, but it's also found in writing.

The pattern is not used to state objective facts. It is subjective and expresses the speaker's own reasoning. Also, in the main clause, you cannot use it when the reason is a simple fact like 'because it rained.' It is not for giving neutral explanations.

電車が遅れたものだから、遅刻してしまいました。

Densha ga okureta mono dakara, chikoku shite shimaimashita.

Because the train was delayed, I ended up being late.

風邪を引いたものだから、今日は休ませてください。

Kaze o hiita mono dakara, kyou wa yasumasete kudasai.

I caught a cold, so please let me take the day off.

道が混んでいたものだから、約束の時間に間に合わなかった。

Michi ga konde ita mono dakara, yakusoku no jikan ni maniawanakatta.

Because the roads were congested, I couldn't make it in time for our appointment.

Not からから is neutral and can be used in any situation. ものだから adds a nuance of apology or self-justification, and it is often used when the speaker feels the need to explain why something couldn't be helped.

Register It is used in both spoken and written Japanese, but it is somewhat formal and can sound stiff in casual conversation; it is common in polite speech and in explanations where the speaker is being careful.

🎯 Quick Quiz

What does this grammar pattern mean or do?

ものだから

📚 How to Master This Pattern

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Press Hear it and repeat ものだから three times. Feel the rhythm — grammar patterns have a natural flow.

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Write Two Sentences

Compose two original sentences using ものだから. One about yourself, one about something you see right now.

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🔗 More JLPT N2 Patterns

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ものだ

describe feeling; express memories

ものではない

shouldn’t do something; it’s impossible

❓ Frequently Asked Questions

What does the grammar pattern ものだから mean? ▼

So; therefore; the reason for something

What JLPT level is ものだから? ▼

Nihoner currently groups this pattern under JLPT N2 — Upper-Intermediate · Academic & formal usage. Use the level label as study guidance rather than a prediction of what will appear on an exam.

How do you use ものだから in a sentence? ▼

Attach ものだから (mono dakara) to the appropriate verb or noun form as described in the usage notes. Then try writing two original sentences — one about yourself and one about something around you.

Is ものだから formal or casual Japanese? ▼

ものだから is used in formal or written contexts. You will see it mainly in written texts, news, business Japanese and academic contexts.

How can I remember ものだから long-term? ▼

Use the flashcard on this page for active recall — see the pattern, reconstruct the usage from memory, then flip. Follow with the 4-choice quiz to distinguish it from similar patterns. Review later the same day and again over the following days. Writing original sentences can help you practise using the pattern in context.