(はっせい)

はっせい
noun
occurrence, outbreak, generation
existence
1. occurrence, outbreak
Something (usually negative like an accident, disaster, or problem) happening or breaking out.
事故(じこ)発生(はっせい)した
An accident occurred.
火災(かさい)発生(はっせい)(ふせ)
To prevent the outbreak of fire.
Damage occurred in various areas due to the heavy rain.
2. generation, production
The production or creation of something (heat, electricity, gas, etc.).
(ねつ)発生(はっせい)する
Heat is generated.
この装置(そうち)電力(でんりょく)発生(はっせい)させる。
This device generates electricity.
Gas may be generated by chemical reactions.

Compound: (はつ) (emit, occur) + (せい) (life, birth)

Common collocations

Often used for

  • Accidents, disasters, problems (negative events)
  • Scientific contexts (generation of heat, electricity, etc.)