Translation guide
The English word 'incidence' refers to the rate or frequency at which something (usually negative) occurs. In Japanese, this concept is expressed differently depending on context, such as disease rates, crime statistics, or general occurrence. There is no single direct equivalent; instead, use words for 'rate', 'frequency', or 'occurrence' as appropriate.
To express how often something happens, particularly in medical, statistical, or formal contexts.
Literally 'occurrence rate'. Commonly used for disease incidence, accident rates, etc. Neutral and widely understood.
The incidence of cancer in this region is high.
Specifically 'morbidity rate' or 'incidence rate' in epidemiology. More technical than 発生率.
The incidence of influenza is rising.
Means 'frequency'. Can be used for incidence in a general sense, but less specific to rates.
The incidence of traffic accidents has decreased.
Specifically 'onset rate' for diseases. Used in medical contexts.
The incidence of this disease is low.
To talk about the fact that something happens, without focusing on the rate.
To express the extent to which something affects a group, often in economics or policy.
There is no single Japanese word that covers all uses of 'incidence'. Using a dictionary lookup like 入射 (incidence of light) or インシデンス (loanword) is usually wrong outside specific technical fields. Always consider the context: rate, occurrence, or burden.
angle of incidence (of light)
We need to analyze the incidence of this policy.