Formal — to staff
Sento · Onsen · Lost · and · Found
You
すみません、脱衣所で眼鏡を忘れてしまったのですが、届いていませんか？
すみません、だついじょでめがねをわすれてしまったのですが、とどいていませんか？
Excuse me, I seem to have left my glasses in the changing room; have they been turned in?
Romaji: Sumimasen, datsuijo de megane o wasurete shimatta no desu ga, todoite imasen ka? / Reply Romaji: Dono yō na megane deshita ka? (Tokuchō o o-ukagai shimasu.)
Reply
どのような眼鏡でしたか？（特徴をお伺いします）
どのようなめがねでしたか？（とくちょうをおうかがいします）
What kind of glasses were they? (We'll ask for features.)
Gesture & etiquette
No specific gesture, but looking concerned or pointing towards the changing room area might be natural.
Be specific about the item and where you think you lost it. Describe it if asked.
#lost#glasses#sento#onsen#public_bath#changing_room#datsuijo