保証
A guarantee or warranty provided to ensure the quality, performance, or truth of something. It is most commonly used for product warranties or official promises that a specific outcome will occur.
Examples
3 of 5この時計には1年の保証がついています。
This watch comes with a one-year warranty.
弊社は製品の品質を保証いたします。
Our company guarantees the quality of our products.
彼の言うことは保証できない。
I can't guarantee what he says is true.
Word Family
Memory Tip
The first kanji 保 means 'protect' and the second 証 means 'evidence'. Think of it as: 'Evidence that protects your purchase.'
Quick Quiz
このパソコンは、故障しても1年間は___があります。
Correct!
The correct answer is: 保証
Examples
この時計には1年の保証がついています。
everydayThis watch comes with a one-year warranty.
弊社は製品の品質を保証いたします。
businessOur company guarantees the quality of our products.
彼の言うことは保証できない。
informalI can't guarantee what he says is true.
この実験結果の再現性は保証されている。
academicThe reproducibility of these experimental results is guaranteed.
署名をもって内容の正確さを保証する。
formalI guarantee the accuracy of the content with my signature.
Word Family
Common Collocations
Common Phrases
保証の限りではない
not necessarily guaranteed
保証人になる
to act as a guarantor
100%保証する
to guarantee 100%
Often Confused With
Used for security or protection of rights (e.g., social security), whereas '保証' is for quality or reliability.
Used for monetary compensation or making up for damages.
Usage Notes
Use this word when discussing product warranties or making a firm promise that something is true or will work. It is very common in shopping and business contracts.
Common Mistakes
Learners often confuse the three 'hoshō' homophones; remember that '保証' contains the kanji for 'proof' (証).
Memory Tip
The first kanji 保 means 'protect' and the second 証 means 'evidence'. Think of it as: 'Evidence that protects your purchase.'
Word Origin
Derived from Middle Chinese roots where 'bao' (protect/keep) and 'zheng' (witness/proof) were combined to mean providing security for a claim.
Grammar Patterns
Cultural Context
In Japan, a 'Hoshōnin' (guarantor) is a very serious role required for renting apartments or taking bank loans, implying shared financial responsibility.
Quick Quiz
このパソコンは、故障しても1年間は___があります。
Correct!
The correct answer is: 保証
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