Translation guide
The English word 'micro' is used as a prefix meaning 'very small' or 'one millionth'. In Japanese, it is commonly expressed with the prefix マイクロ (maikuro) in loanwords, or with native terms like 微小 (bishō) in technical contexts. This guide covers how to express 'micro' in various situations.
The speaker wants to use 'micro' as a prefix in a word, like 'microorganism' or 'micrometer'.
The most common way to express 'micro' as a prefix in Japanese. It is used in many loanwords and technical terms, such as マイクロフォン (microphone) or マイクロプロセッサ (microprocessor).
This microchip is very small.
An alternative rendering of 'micro', often used in academic or philosophical contexts, such as ミクロの世界 (the micro world). Less common than マイクロ in everyday loanwords.
Means 'minute' or 'very small'. Used in formal or scientific contexts, often as an adjective (微小な). Not used as a prefix in the same way as マイクロ.
The speaker wants to describe an object or concept as 'micro' in size or scale, like 'microscopic' or 'tiny'.
Means 'extremely small' or 'ultra-small'. Commonly used in product descriptions (e.g., 極小サイズ) and technical contexts.
This camera is micro-sized and convenient to carry.
Literally 'super small type'. Often used for devices or components, like 超小型コンピュータ (microcomputer).
As above, but used as a descriptor. It emphasizes minuteness, often in scientific contexts.
The speaker uses 'micro' as a standalone noun, e.g., 'I bought a new micro' (meaning microcomputer) or 'Speak into the micro'.
Short for microphone. This is the standard term in Japanese.
Please turn on the micro and speak.
Short for microcomputer. Commonly used in electronics and hobbyist contexts.
Both are loanwords from English 'micro'. マイクロ is more common in everyday and technical terms (e.g., マイクロ波 microwaves), while ミクロ is often used in academic or philosophical contexts (e.g., ミクロ経済学 microeconomics). When in doubt, use マイクロ for general purposes.
Microplastics are an environmental issue.
Explore the micro world.
While マイクロ is versatile, it may not be natural in all contexts. For describing small size, consider 極小 or 超小型. For scientific minuteness, 微小 is more appropriate. Using マイクロ as a standalone adjective (e.g., マイクロな問題) is not standard Japanese; instead, use 微小な or rephrase.
Analyze the problem from a micro perspective.
微小な粒子が空気中に浮遊している。
Microscopic particles are floating in the air.
超小型のセンサーを開発した。
We developed a micro sensor.
A micro scratch caused the malfunction.
このマイコンでロボットを制御する。
I control the robot with this micro.
The full term for microcomputer. Used in formal or technical writing.
I'm researching the history of micros.