Translation guide
Describes the situation where two or more people use the same room, typically for sleeping or living. Japanese expressions vary based on whether it's a hotel room, a dormitory, or a shared living space.
To say that people are staying in the same room together, often to save money or because of limited space.
Noun meaning 'sharing a room', commonly used for hotels, inns, or dormitories. Often used with する to mean 'to share a room'.
I ended up sharing a room with him.
Do you mind sharing a room?
Literally 'same room', used as a noun or with する. Slightly more formal than 相部屋, often used in contexts like hospitals, dorms, or business trips.
We shared a room during the training.
Loanword from English 'room share', used specifically for sharing an apartment or house, not a temporary hotel room. Implies a living arrangement.
I'm sharing an apartment with a friend.
A simple, colloquial way to say 'the same room'. Often used with に泊まる (stay) or になる (become).
We always share a room when we travel.
To describe a long-term living situation where people share a room, like siblings or roommates.
相部屋 is the most common for temporary shared accommodation like hotels or school trips. 同室 is slightly more formal and can be used in institutional settings. ルームシェア specifically refers to sharing a rented apartment or house, not a single room.
Avoid directly translating 'share a room' as 部屋をシェアする, as it sounds unnatural. Use 相部屋 or 同室 for temporary stays, and ルームシェア for long-term apartment sharing.
I share a room with my younger sister.