Translation guide
A key that opens multiple locks, often in a building or system. In Japanese, the most common term is マスターキー, a loanword from English. There are also native terms like 親鍵 and 合鍵, but 合鍵 more often means a duplicate key. This guide explains how to express the concept naturally.
A single key that can open many different locks, such as in a hotel, office, or apartment building.
The most common and widely understood term. A loanword from English, used in hotels, offices, and apartment buildings.
You can open all the rooms with this master key.
Literally 'parent key'. A native Japanese term, but less common than マスターキー. Used in technical or locksmith contexts.
If you have the master key, you can enter any room.
Usually means a duplicate key, but in some contexts can refer to a master key. Use with caution; clarify the meaning if needed.
Most Japanese speakers will understand 合鍵 as a duplicate key, not a master key. Only use this if the context makes it clear.
This master key works for all rooms.
The system or concept of having a master key that opens multiple locks.
The standard term for a master key system, used in building management and security.
This building uses a master key system.
Something that provides access to many things or solves many problems, like a 'master key' to success.
The loanword can also be used figuratively, similar to English.
This knowledge will be the master key to solving the problem.