31 miles from Gero Station in Nakatsugawa, Iwasu-so features accommodations with access to a public bath and open-air bath. Each accommodation at the 2-star ryokan has mountain views, and guests can enjoy access to a sauna and a hot spring bath. There's a sun terrace and guests can make use of free Wifi, free private parking, and an electric vehicle charging station. The ryokan will provide guests with air-conditioned units with a tatami, a kettle, a safety deposit box, a flat-screen TV, and a shared bathroom with a bidet. At the ryokan, all units are allergy-free. At the ryokan, the units are fitted with bed linen and towels. An Asian breakfast is available at the ryokan. There is an on-site family-friendly restaurant, coffee shop, and bar. For guests with children, Iwasu-so offers an indoor play area. A bicycle rental service is available at the accommodation, while cycling can be enjoyed nearby. Enakyo Wonderland is 4.5 miles from Iwasu-so, while Ōi is 8.2 miles away. Nagoya Airport is 42 miles from the property.