すみません、この駅でICカードで降りる場合、どこでタッチすればいいですか？ — Excuse me, when exiting at this station with an IC card, where should I tap it? (Train · Station, Formal — to staff, JLPT N4)

Gesture & etiquette

Hold up your IC card, point to the general area where a reader might be (if you see one but it's not obvious). Slight bow.

Never attempt to jump over gates or assume fare evasion if unsure about the payment method. Always seek clarification from a local, staff (if available), or use an intercom.