万一

• 読み: まんいち
• ローマ字: man'ichi
• 漢字の分解: 万 (man) — ten thousand; 一 (ichi) — one
• 発音: /ma.n.i.tɕi/

意味

By some chance; if by any chance; in the unlikely event. Expresses a low-probability scenario.

A noun and adverb used to introduce hypothetical situations that are unlikely but worth preparing for. Literally means 'one in ten thousand.' Often paired with conditional forms like の場合 or たら. Common in safety instructions, insurance contexts, and cautious planning.

例文

1. 万一に備えて保険に入っておこう。
2. 万一のことがあったら、すぐ連絡してください。
3. 万一遅れる場合は電話をください。

使い方ガイド

場面: safety, insurance, contingency planning

トーン: cautious

起源と歴史

Composed of 万 (ten thousand) and 一 (one). The literal meaning 'one in ten thousand' conveys an extremely low probability, similar to the English phrase 'one in a million.'

文化的背景

時代: Classical

世代: All ages

社会的背景: Universal