Translation guide
Describes materials, objects, or structures that are resistant to fire or made to not burn easily. In Japanese, this is often expressed with compound adjectives, nouns, or verbs.
Describing something as resistant to fire or not easily burned, often for materials or products.
The most common and general adjective meaning 'fireproof' or 'fire-resistant'. Used for materials, safes, building components, etc.
この金庫は耐火性です。
This safe is fireproof.
We use fireproof curtains.
Means 'non-combustible' or 'incombustible'. Often used in technical or building contexts.
不燃性の建材を使用してください。
Please use fireproof building materials.
Literally 'fire prevention'. Used for structures, doors, or measures designed to prevent fire spread.
防火扉が閉まりました。
The fireproof door closed.
Expressing the action of treating something to become fireproof.
Verb phrase meaning 'to fireproof' or 'to apply fire-resistant treatment'.
この布地は耐火加工されています。
This fabric has been fireproofed.
Means 'to apply fireproofing treatment'. Often used for wood or textiles.
木材に防火処理をしました。
We fireproofed the wood.
Referring specifically to a fireproof safe or box for valuables.
Standard term for a fireproof safe.
重要書類は耐火金庫に保管しています。
Important documents are kept in a fireproof safe.
耐火性 (taikasei) is the most general term for fire resistance. 不燃性 (funensei) emphasizes that something does not burn at all (non-combustible). 防火 (bōka) relates to fire prevention measures, often for buildings or systems.