保証する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 保証する | 保証しない |
| Polite | 保証します | 保証しません |
| Past polite | 保証しました | 保証しませんでした |
| Past | 保証した | 保証しなかった |
| Te-form | 保証して | 保証しないで |
| Desire | 保証したい | 保証したくない |
| Potential | 保証できる | 保証できない |
| Passive | 保証される | 保証されない |
| Causative | 保証させる | 保証させない |
| Causative passive | 保証させられる | 保証させられない |
| Volitional | 保証しよう | |
| Polite volitional | 保証しましょう | |
| Imperative | 保証しろ | 保証するな |
| Conditional | 保証すれば | 保証しなければ |
| Tara conditional | 保証したら | 保証しなかったら |
noun, noun or participle which takes 'suru', transitive verb
guarantee; assurance; security
Broad sense: a promise that something is true or will happen, or a system that provides safety. 保障 is used for social/institutional security; 保証 is used for personal or product guarantees.
This product has a label that guarantees its quality.
社会保障は国民の生活を保障する仕組みだ。
Social security is a system that guarantees the livelihood of citizens.
noun, noun or participle which takes 'suru', transitive verb
Only when written 保証
Specific to product warranties: a formal promise to repair or replace an item within a certain period. Written only as 保証.
この時計には3年間の保証が付いています。
This watch comes with a three-year warranty.
This maker guarantees the quality of its products.
This computer comes with a one-year warranty.
The company has an obligation to guarantee its employees' safety.
The refrigerator's warranty has already expired.
お墨付き implies endorsement from a respected person or institution, while 保証 simply means a guarantee and doesn't require high status backing.
保証 is the act or state of guaranteeing something, while 保証人 is the specific person who provides that guarantee.
保証 means to guarantee or vouch for something, while 保護 means to protect or safeguard; they share the kanji 保 and sound similar but differ in meaning.
保証 (same reading as 保障 in 安全保障) means a personal guarantee or warranty, not a security policy, so writers must be careful not to swap the kanji.
warranty provider
guarantee fee