主因
Meanings
1
primary cause; main factor
Used in formal or analytical contexts to identify the most important reason or factor behind a situation, event, or problem.
The primary cause of the accident was the driver's carelessness.
Experts are analyzing the main factors behind the economic downturn.
Usage patterns
- 〈事〉が主因となるto be the main cause of (something)
The strong yen became the main cause of the export slump.
- 〈事〉を主因としてwith (something) as the main cause
The plan was cancelled, mainly due to a lack of funds.
- 主因は〈事〉にあるthe main cause lies in (something)
The main cause of the accident lies in the driver's carelessness.