Meaning and Usage
The word 火災 (かさい) specifically refers to a fire incident, often implying a destructive or dangerous fire such as a building or forest fire. It is a formal term commonly used in news reports, official documents, and emergency contexts.
Common Contexts
You will often see 火災 used when talking about fire alarms (火災報知器), fire prevention (火災予防), or fire damage (火災被害). It is not used for small or controlled fires like a campfire.
Collocations and Patterns
- 火災報知器 (かさいほうちき): fire alarm device
- 火災現場 (かさいげんば): fire scene or site
- 火災保険 (かさいほけん): fire insurance
- 火災が起きる: a fire breaks out
Register and Nuance
火災 is a neutral to formal word. It is appropriate in both spoken and written Japanese when discussing serious fires. It is not casual and is rarely used in everyday conversation unless reporting or describing an incident.
Common Mistakes
Learners sometimes confuse 火災 with 火事 (かじ), which also means fire. 火事 is more general and can be used in casual speech, while 火災 is more formal and specific to incidents involving damage or danger. Use 火災 when emphasizing the seriousness or official nature of the fire.