Formal — to staff
Onsen · Public · Bath
You
すみません、お風呂に入る前に、体をどこまで洗えばいいですか？
すみません、おふろにはいるまえに、からだをどこまであらえばいいですか？
Excuse me, before entering the bath, how thoroughly should I wash my body?
Romaji: Sumimasen, ofuro ni hairu mae ni, karada o doko made araeba ii desu ka? / Reply Romaji: Hai, yokusō ni hairu mae ni, sekken de zenshin o yoku arainagashite kudasai. Kakeyu mo wasurezu ni.
Reply
はい、浴槽に入る前に、石鹸で全身をよく洗い流してください。かけ湯も忘れずに。
はい、よくそうにはいるまえに、せっけんでぜんしんをよくあらいながしてください。かけゆもわすれずに。
Yes, before entering the bathtub, please wash your entire body thoroughly with soap. And don't forget to rinse with hot water.
Gesture & etiquette
Pointing towards the washing area and then towards the bath, or using a questioning hand gesture.
Don't bring large towels into the bath water. Don't let your hair touch the water. Don't swim or splash. Rinse thoroughly to remove all soap.