〜わけだ
Formation
Meaning
Used to explain or express something that naturally follows from a certain fact or situation, or when something becomes clear after hearing an explanation.
Note
Used when a reason becomes clear or to state a logical conclusion. Often paired with 'dakara' (so) or 'toori de' (no wonder).
Examples
円安だから、輸入品が高くなるわけだ。
Because of the weak yen, imported goods naturally become expensive.
あの二人は結婚したのか。だから一緒に住んでいるわけだ。
Did those two get married? Oh, that explains why they live together.
クーラーが壊れているのか。通りで暑いわけだ。
The AC is broken? No wonder it's hot.
夜更かししたの？なるほど、眠いわけだね。
You stayed up late? I see, no wonder you are sleepy.
毎日練習しているから、彼はピアノが上手なわけだ。
Because he practices every day, it's natural that he is good at piano.
彼女のお父さんは日本人です。だから、日本語がペラペラなわけだ。
Her father is Japanese. That's why she is fluent in Japanese.
今日は日曜日か。通りで会社が休みのわけだ。
Oh, it's Sunday today. No wonder the company is closed.
彼はアメリカ生まれか。英語がネイティブだというわけだ。
So he was born in America. That explains why his English is native.