Meaning & usage
だけに means precisely because of the stated reason, the resulting feeling or situation is even stronger or more natural. It is used when the outcome is an intensified evaluation or expected consequence, as in 期待していただけに or プロだけに. It follows plain forms of verbs and adjectives and nouns, with な kept for na-adjectives and nouns taking だけに directly, and it differs from から in that it cannot state a neutral cause without that sense of all the more.
Example sentences 6
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火星は地球とよく似ているだけにひとしお興味をひく。
Mars is all the more interesting for its close resemblance to our Earth.
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期待していただけに残念だ。
Because I had been looking forward to it, I am all the more disappointed.
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人気の店だけにいつも混む。
Precisely because it is a popular shop, it is always crowded.
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子どもだけに正直な意見だ。
Precisely because it is from a child, it is an honest opinion.
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プロだけに動きが速い。
As you would expect from a pro, the movements are fast.
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高かっただけによく切れる。
Precisely because it was expensive, it cuts well.
In past JLPT papers
This came up in 5 past exam questions.
And 1 more test.