Translation of "Lavatory" in Japanese

Where's the lavatory?

トイレはどこですか。

- We have just cleaned the lavatory.
- We just cleaned the restroom.

ちょうど今トイレの掃除が終わったところです。

- Where is the bathroom?
- Where's the restroom?
- Where is the toilet?
- Where's the toilet?
- Where's the bathroom?
- Where are the restrooms?
- Where's the loo?
- Where's the lavatory?

トイレはどこですか。