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Proverb / Kotowaza

雲泥の差

ReadingうんでいのさRomajiundei no sa

An immense difference or gap between two things that makes them incomparable.

The difference between clouds and mud

Quick Answer

An immense difference or gap between two things that makes them incomparable.

Literal Image
The difference between clouds and mud
How to Use It
Used when comparing two things of the same category to highlight that one is vastly superior or simply completely different from the other.

Meaning

This expression describes a situation where there is such a vast disparity between two items that they cannot be reasonably compared. One is viewed as being as high as the clouds in the sky, while the other is as low as the mud on the ground, emphasizing an extreme distance in quality, status, or performance.

Literal Image

The difference between clouds and mud

How to Use It

Used when comparing two things of the same category to highlight that one is vastly superior or simply completely different from the other.

Tone

Neutral but used to emphasize a sharp and undeniable contrast.

Examples

01

同じメーカーの製品でも、最新モデルと10年前のモデルでは、その性能に雲泥の差がある。

Even for products from the same manufacturer, there is a world of difference in performance between the latest model and one from ten years ago.

Learning Notes

Key Vocabulary

Estimated LevelN2Confidence: High
Estimate, not an official JLPT list

The kanji for 'mud' and 'difference' are standard intermediate, and the phrase is a core idiomatic expression for describing disparities.

うん / un

cloud

でい / dei

mud

さ / sa

difference; gap

Usage Profile

NeutralCautionary

Usage note: This phrase emphasizes an extreme gap; using it for small differences may sound hyperbolic.

Misread Risk

Do not interpret this as a literal statement about weather or soil; it is strictly a metaphor for incomparable differences.

Search As

雲泥の差うんでいのさundei no saundeinosaundei-no-saunde-nosaunde nosa

Kanji in This Proverb

Related Proverbs

Entry available提灯に釣鐘chochin ni tsuriganeUsed to describe two things that are incomparable due to a vast difference in quality, status, or weight.Entry available大同小異daidou shouiAlthough there are minor differences, things are essentially the same.
Similar月と鼈
Similar天と地
Similar雪と墨
Opposite甲乙つけがたい
Opposite似たり寄ったり

Origin

The term 'clouds' refers to things high in the sky, while 'mud' refers to things on the ground. Because of the vast distance between the heavens and the earth, the phrase became a way to express extreme differences. Similar expressions are found in the poetry of Bai Juyi (Bai Rakuten) from the Tang Dynasty in China.

Index

Topics, Situations, and Tags

01

Topics

Truth and AppearancesPower and Status
02

Situations

Compare People or Things
03

Tags

⚔️Life & General Wisdom👥Social Dynamics

Source Note

Where did this entry get its data from? The reference links are listed below. To understand how to read this section, see Data Sources.

Published
2019-09-24
Updated
2026-05-08
Source 1: tomomi965.comSource 2: tomomi965.comSource 3: tomomi965.comSource 4: tomomi965.comSource 5: tomomi965.comSource 6: tomomi965.comSource 7: tomomi965.comAbout Data SourcesReport a Correction

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