noun
inquiry desk; information counter
A service counter where customers or visitors can ask questions, get information, or make inquiries.
駅の問い合わせ窓口で電車の時刻を聞いた。
I asked about the train schedule at the station's information counter.
製品についての質問は、こちらの問い合わせ窓口までお願いします。
For questions about the product, please contact this inquiry desk.
Compound of 問い合わせ (inquiry) + 窓口 (counter, window).