Onzan

Onzan [狻山; おんざん] is a city located in eastern Tomono Prefecture. As of 2022, it had a population of roughly 25,000. 
Onzan is known for its large number of natural hot spring resorts. There are two major hot spring resort areas within the town; the larger and more famous one is Sendzu Reijō, located in the mountains east of the city. The name means 'four thousand', and represent the 4,000 ailments the water is traditionally said to cure. The other resort is called Sadake Reijō.
== Geography ==
Onzan is located north-east of the larger city of Akagetsu, and serves as a major bedroom community. Onzan is bordered to the north by the curve of the Ōki River, which provides irrigation for rice farming in the Inegano district. 
== Economy ==
The economy of Onzan is heavily dependent on seasonal tourism primarily in connection with its reijo hot spring resorts. Lumber has also been traditionally a significant export for the city. 
== Local attractions ==
* Kazabetsu Falls
* Onzan Castle
* Ōnari Reijō
* Sendzu Reijō
* Sadake Reijō
* Onzan Central Park
* Danzu kyōbun