Translation guide
The English word 'extension' covers several distinct ideas: making something longer or larger, adding extra time, a telephone line, a file suffix, and more. This guide organizes the most useful Japanese expressions by meaning.
To express the act of extending something in length, size, or scope, or the state of being extended.
Most common for extending length, duration, or a deadline. Used for both physical and abstract extensions.
It was decided to extend the meeting.
The extension work on this road will start next month.
Used for expanding scope, capacity, or functionality, like extending a building or a computer's memory.
I need a memory extension.
We extended the store and made the sales floor larger.
Refers to physical stretching or elongation, often used in technical or biological contexts.
This material has a high extension rate.
To express giving more time, such as for a payment, assignment, or visa.
To refer to an additional phone line within an office or building.
The standard term for a telephone extension number.
Extension 123, please.
To refer to the suffix of a file name indicating its type.
The technical term for file extension.
The extension of this file is '.txt'.
To express broadening the scope or application of an idea, theory, or service.
To refer to artificial hair added to natural hair.
延長 (えんちょう) is for extending length or time. 拡張 (かくちょう) is for expanding capacity or functionality. 拡大 (かくだい) is for enlarging scale or scope. Choose based on what is being extended.
Could I request an extension for the report deadline?
I was granted an extension for payment.
As an extension of his theory, a new hypothesis was born.
I added volume with hair extensions.