There are two day-use hot spring facilities, "Onto" which is the original hot spring, and "Reito" which is located a little up the hill from Onto in the hot spring town of Nagato, Yamaguchi. The spring quality is alkaline simple hot spring with a temperature of 38.8 degrees Celsius. The bathing fee is quite reasonable, which is also a plus.

Onto does not heat or add water to its hot spring water. On the other hand, Reito is heated.

There is also a free footbath by the riverbank.