〜だけに
Precisely because 〜だけに
Meaning
"Precisely because ~", "all the more so because ~".
Formation
[plain form] + だけに · [noun] + だけに · [na-adj] な + だけに
Notes
The result is stronger than it would otherwise be, and the sentence usually carries surprise or heightened feeling that a plain ので lacks. 〜だけあって is the positive-only relative, praising a result that lives up to its cause.
Examples
期待（きたい）していただけに、負（ま）けてがっかりしました。
I had my hopes up, so losing was all the more disappointing.
Breakdown
若（わか）いだけに、回復（かいふく）が早（はや）いですね。
Being young, they recover all the faster.
Breakdown
有名（ゆうめい）な店（みせ）だけに、いつも混（こ）んでいます。
Being a famous restaurant, it is always crowded.
Breakdown
責任者（せきにんしゃ）だけに、彼（かれ）の言葉（ことば）は重（おも）い。
Coming from the person in charge, his words carry weight.
Breakdown
一生懸命（いっしょうけんめい）練習（れんしゅう）しただけに、うれしさも大（おお）きい。
Having practised so hard, the joy is that much greater.
Breakdown
⚠️ Often confused with
〜からには
Now that / given that 〜からには
"Now that ~", "given that ~" — a premise the speaker then acts on.
〜ことだから
Knowing them 〜ことだから
"Since it is ~ (that person), …" — a prediction based on someone's known character.
〜からこそ
It is precisely because 〜からこそ
"It is precisely because ~ that …" — emphatic reason.