要因

• Reading: よういん
• Romaji: youin
• Kanji breakdown: 要 (you) — essential, important; 因 (in) — cause, factor
• Pronunciation: /jo.ɯ.iɴ/

Meaning

Main cause; primary factor. A key element contributing to a result or outcome.

A noun used in analytical or explanatory contexts to identify the primary contributing factors behind an event, trend, or outcome. More formal and precise than 原因 (general cause), 要因 emphasises that something is a significant or essential factor among potentially many. Frequently used in news, academic writing, and business analysis.

Examples

1. 事故の要因はまだ調査中だ。 The factors behind the accident are still under investigation.
2. 成功の要因は努力だけではない。 Hard work isn't the only factor behind success.
3. 経済成長の要因を分析する必要がある。 We need to analyze the factors driving economic growth.

Usage Guide

Context: analysis, news, academics, business

Tone: analytical

Origin & History

From Sino-Japanese 要 (you, essential/important) + 因 (in, cause/factor). Together: 'essential cause' — a primary or key factor behind something.

Cultural Context

Era: Modern

Generation: All ages

Social background: Universal