Is there an outdoor bath? in Japanese

露天風呂はありますか

In kana only: ろてんぶろはありますか

rotenburo wa arimasu ka

polite

What it literally says

as for an open-air bath, does it exist

Japanese politeness is mostly built out of phrases that stopped being literal a long time ago. Knowing what is underneath is the difference between repeating a sound and knowing what you said.

When to use it

The rotenburo is usually the best part.

Next in Onsen and Public Baths

(Men)男
What time does the bath close?お風呂は何時までですか
Where do I put my clothes?服はどこに置きますか
Where do I wash?どこで体を洗いますか
Where is the changing room?脱衣所はどこですか
(Women)女

What it literally says

When to use it

Next in Onsen and Public Baths

The rest of the phrasebook