Translation guide
In Japanese, the concept of an alphanumeric character set is typically expressed using specific terms that refer to the types of characters involved. The most common way is to combine words for letters and numbers, or to use technical terms derived from English.
alphanumeric characters
The learner wants to refer to the set of letters (A-Z, a-z) and digits (0-9) in a general context, such as in passwords, codes, or data entry.
This is the standard term for 'alphanumeric characters'. It combines 英 (English/letter) and 数字 (numeral). Used in technical and everyday contexts.
Please enter your password using alphanumeric characters.
Characters other than alphanumeric characters cannot be used.
A more explicit phrase meaning 'alphabet and numbers'. It is less compact but clearer for beginners.
The username is composed of letters and numbers.
The learner is discussing character sets in programming, databases, or system configurations.
Same as above, but heavily used in technical documentation.
This field only allows alphanumeric characters.
A direct translation of 'alphanumeric character set', used in technical specifications.
An abbreviation of 英数字, often seen in technical contexts or as a prefix (e.g., 英数モード). It is less common in full sentences.
The learner needs to instruct users about what characters are permitted in an input field.
This means 'half-width alphanumeric characters', which is the standard for ASCII letters and digits in Japanese computing. It explicitly excludes full-width characters.
Please fill in your name using half-width alphanumeric characters.
A shorter version of 半角英数字, commonly seen on websites and in software.
Do not translate 'alphanumeric character set' word-for-word as アルファニューメリック文字セット. While understandable, it is not natural Japanese. Use 英数字 or 英数字セット instead.
In Japanese computing, 'half-width' (半角) refers to standard ASCII characters, while 'full-width' (全角) refers to wider characters often used for Japanese text. When specifying alphanumeric input, 半角英数字 is the most precise term to ensure users enter standard letters and numbers.
The alphanumeric character set includes uppercase and lowercase letters.
英数モードに切り替えてください。
Please switch to alphanumeric mode.
Please set a password with at least 8 half-width alphanumeric characters.