発生する · noun or participle which takes 'suru'
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 発生する | 発生しない |
| Polite | 発生します | 発生しません |
| Past polite | 発生しました | 発生しませんでした |
| Past | 発生した | 発生しなかった |
| Te-form | 発生して | 発生しないで |
| Desire | 発生したい | 発生したくない |
| Potential | 発生できる | 発生できない |
| Passive | 発生される | 発生されない |
| Causative | 発生させる | 発生させない |
| Causative passive | 発生させられる | 発生させられない |
| Volitional | 発生しよう | |
| Polite volitional | 発生しましょう | |
| Imperative | 発生しろ | 発生するな |
| Conditional | 発生すれば | 発生しなければ |
| Tara conditional | 発生したら | 発生しなかったら |
noun, noun or participle which takes 'suru', intransitive verb
occurrence; outbreak; emergence
Used for events, phenomena, problems, or new things coming into existence or appearing, often spontaneously or as a result of conditions. Covers natural disasters, diseases, incidents, and abstract emergence.
It is difficult to predict the occurrence of earthquakes.
An infectious disease broke out in this area.
noun, noun or participle which takes 'suru', transitive verb, intransitive verb
Used for the deliberate or natural production of something, especially power, heat, gas, or signals. Often implies a process or mechanism that brings something forth.
This power plant generates electricity.
Heat is generated by friction.
noun, noun or participle which takes 'suru', intransitive verb
Biology term for the development or growth of an organism, from embryo to mature form. Also used more broadly for the emergence and development of living things.
Observe the developmental process of the embryo.
Earthquakes occur in this region every year.
This device generates electricity.
A fire broke out at the factory.
発生 focuses on an event or problem arising or occurring, whereas 出現 focuses on something becoming visible or observable for the first time.
発生する is a formal, often technical word for something occurring (e.g. a disease, phenomenon), whereas 起きる is the everyday word for events happening.
発生する is the more common modern verb for something occurring or breaking out, while 発する is a more literary or formal alternative used in the same sense.
発生する emphasizes the emergence or onset of something (like a disaster or disease), overlapping with the intransitive sense of 生ずる, but 発生する is the standard term in technical and news contexts while 生ずる is more literary.
embryology
incidence rate; frequency of occurrence