Formal — to staff
Onsen · Sento
すみません、こちらの湯船、少し熱いのですが、水で薄めても大丈夫でしょうか? — Excuse me, this bath is a bit hot. Is it okay if I dilute it with cold water? (Onsen · Sento, Formal — to staff, JLPT N3)
You
すみません、こちらの湯船、少し熱いのですが、水で薄めても大丈夫でしょうか?
すみません、こちらのゆぶね、すこしあついのですが、みずでうすめてもだいじょうぶでしょうか?
Excuse me, this bath is a bit hot. Is it okay if I dilute it with cold water?
Romaji: Sumimasen, kochira no yubune, sukoshi atsui no desu ga, mizu de usumetemo daijōbu deshō ka? / Reply Romaji: Hai, kamaimasen yo. Dōzo, go yukkuri o hairi kudasai.
Reply
はい、構いませんよ。どうぞ、ごゆっくりお入りください。
はい、かまいませんよ。どうぞ、ごゆっくりおはいりください。
Yes, that's fine. Please take your time and enjoy your bath.
Gesture & etiquette
Gentle bowing motion (if talking to staff/elderly) or just a polite expression.
Always ask before adjusting water temperature, especially if it involves adding water to a communal bath. Do not add soap or other foreign substances.