noun
hot spring day-use bathing; bathing at a hot spring without staying overnight
Refers to using the bathing facilities of a hot spring inn or resort without booking a room. Common at onsen towns and ryokan that offer day-visitor plans.
旅館の立ち寄り湯を利用して、日帰りで温泉を楽しんだ。
We enjoyed the hot spring as a day trip by using the ryokan's day-use bathing.
この温泉地には、立ち寄り湯ができる施設がいくつかある。
In this hot spring area, there are several facilities where you can bathe without staying overnight.
Compound of 立ち寄り (dropping in, from 立ち寄る) and 湯 (hot water, hot spring).