〜のに (noni)

JLPT N3
How to express surprise or frustration — “even though.”
Meaning
“Even though ~ / although ~ / despite ~.” Marks an unexpected or disappointing contrast.
Formation
Verb / い-adj (plain) + のに
な-adj + な + のに; Noun + な + のに
Examples
一生懸命勉強したのに、試験に落ちた。
Isshōkenmei benkyō shita noni, shiken ni ochita. — Even though I studied hard, I failed the exam.
まだ4月なのに、もう暑い。
Mada shi-gatsu na noni, mō atsui. — Even though it's only April, it's already hot.
約束したのに、彼は来なかった。
Yakusoku shita noni, kare wa konakatta. — He promised, yet he didn't come.
高かったのに、すぐ壊れた。
Takakatta noni, sugu kowareta. — Even though it was expensive, it broke right away.
How it works
のに carries an emotional nuance — surprise, disappointment, or complaint — that a plain けど / が doesn't. The result clashes with what you'd expect from the first part.
Compared with similar expressions
〜のに — even though (with surprise / frustration).
〜けど / が — but (neutral contrast).
〜ても — even if (hypothetical).
Common mistakes
な-adj / Noun: 元気 → 元気なのに, 学生 → 学生なのに
のに adds emotion — don't use it for a purely neutral “but.”
Related grammar
〜ても — even if
〜けど — but
〜わりに — considering / for
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