for that reason; no wonder (わけだ) – Japanese Grammar わけだ (wake da)

Q: What JLPT level is わけだ?

JLPT N3 — Intermediate · Expressing nuance & contrast

Q: How do you use わけだ in a sentence?

Attach わけだ to the appropriate verb or noun form. For that reason; no wonder

Q: Is わけだ formal or casual Japanese?

わけだ can be used in both casual conversation and polite speech depending on context.

わけだ

N3 GRAMMAR ⏱ 0s study 📖 0 today

wake da

for that reason; no wonder

こと koto は～で有名 wa~de yuumei たとえ～ても tatoe~temo のでしょうか no deshou ka たって tatte 結果 kekka にとって ni totte といい / たらいい to ii / tara ii てはじめて te hajimete について ni tsuite べきではない beki dewa nai にかわって ni kawatte すでに sude ni といっても to ittemo てはいけないから te wa ikenai kara ぶりに buri ni ところで tokoro de ことになっている koto ni natteiru 中 chuu / juu ても始まらない temo hajimaranai こと koto は～で有名 wa~de yuumei たとえ～ても tatoe~temo のでしょうか no deshou ka たって tatte 結果 kekka にとって ni totte といい / たらいい to ii / tara ii てはじめて te hajimete について ni tsuite べきではない beki dewa nai にかわって ni kawatte すでに sude ni といっても to ittemo てはいけないから te wa ikenai kara ぶりに buri ni ところで tokoro de ことになっている koto ni natteiru 中 chuu / juu ても始まらない temo hajimaranai

🃏 Flashcard

わけだ

wake da

Tap to reveal usage

for that reason; no wonder

Tap to test your recall · +10 XP

📊 Pattern Stats

JLPT Level N3

Intermediate · Expressing nuance & contrast

Reading wake da

Post ID 50978

Patterns today 0

0 / 10 daily goal

📝 Usage Notes

for that reason; no wonder

📖 How to use it

Explains that something is the natural result or reason for what was just said, often translated as 'no wonder' or 'that's why'.

Attaches to Attach to the plain form of verbs and adjectives (dictionary form for present/future, past form for past), and to nouns with な (e.g., 学生なわけだ). For な-adjectives, use stem + な (e.g., 静かなわけだ). For い-adjectives, use the plain form directly (e.g., 高いわけだ).

わけだ is used when you state a conclusion or reason that follows logically from something else. It often conveys a sense of realization or explanation. For example, if you see someone looking tired and they say they didn't sleep, you can say 眠らなかったわけだ, meaning 'That's why you're tired.' It can also mean 'no wonder' when you discover the cause of something. For instance, if you learn that a person is a professional chef, you might say 料理が上手なわけだ, meaning 'No wonder they're good at cooking.' This pattern is common in both speech and writing, but in casual conversation it's often shortened to わけ or んだ, but as a learner stick to the full form to be clear.

彼は毎日練習している。上手なわけだ。

Kare wa mainichi renshuu shite iru. Jouzu na wake da.

He practices every day. No wonder he's good.

電車が遅れたから、遅刻したわけだ。

Densha ga okureta kara, chikoku shita wake da.

The train was late, so that's why I was late.

この店は安くておいしい。いつも込んでいるわけだ。

Kono mise wa yasukute oishii. Itsumo konde iru wake da.

This shop is cheap and delicious. No wonder it's always crowded.

Not はずだわけだ states a logical conclusion based on facts you already know, often with a sense of 'it makes sense'. はずだ expresses expectation or probability ('should be') based on evidence, but not necessarily a conclusion. For example, 彼は毎日練習しているから上手なはずだ means 'He practices every day, so he should be good' (you haven't seen it, but you expect so). 上手なわけだ means 'No wonder he's good' (you've seen it and now understand why).

Register Neutral; used in both spoken and written Japanese, but in very casual speech you might hear わけ instead, though わけだ is perfectly fine in conversation.

🎯 Quick Quiz

What does this grammar pattern mean or do?

わけだ

📚 How to Master This Pattern

🔊

Say It Aloud

Press Hear it and repeat わけだ three times. Feel the rhythm — grammar patterns have a natural flow.

🃏

Flip Before Reading

Always try to recall the usage before flipping the card. Struggle = learning. Every failed recall makes the next one stick harder.

✍️

Write Two Sentences

Compose two original sentences using わけだ. One about yourself, one about something you see right now.

⏰

Spaced Review

Save this pattern and revisit at 10 min, 1 day, 3 days. Production (writing) beats recognition for grammar.

🔗 More JLPT N3 Patterns

it doesn’t mean that~

❓ Frequently Asked Questions

What does the grammar pattern わけだ mean? ▼

For that reason; no wonder

What JLPT level is わけだ? ▼

Nihoner currently groups this pattern under JLPT N3 — Intermediate · Expressing nuance & contrast. Use the level label as study guidance rather than a prediction of what will appear on an exam.

How do you use わけだ in a sentence? ▼

Attach わけだ (wake da) 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 わけだ formal or casual Japanese? ▼

わけだ is used in both casual and polite contexts. It appears frequently in everyday conversation, textbooks, and simple written materials.

How can I remember わけだ 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.