Do you think it difficult to have a good hot spring in a large-sized hotel?
Indeed, it is usually true, so that small motels with hot springs often provide their water in a better condition.
However, there are some exceptions:
Izura in Ibaragi is one of the most important places for Japanese modern art, and is famous for its beautiful scenery.
In a large-sized hotel at such tourist spot, there is a great hot spring with characteristic smell.Kanto Region, Rating [4/5] Lodging