noun
hot spring guest; visitor at a hot spring resort
Refers to a person staying at a hot spring resort for therapeutic bathing (湯治).
この旅館は湯治客でにぎわっている。
This inn is bustling with hot spring guests.
観光客 is a general tourist, while 湯治客 specifically visits for health-related bathing.
Compound of 湯治 (hot spring cure) and 客 (guest, visitor).