This museum spans multiple atmospheric buildings and exhibits a collection of artwork by the turn of the century painter, Takehisa Yumeji, who was born in Okayama, but visited Ikaho several times. The museum also displays a few large, antique music boxes from around the world, which are played several times daily. A selection of Taisho and Meiji era glasswork is displayed in a separate building.

The Hoshina Art Museum displays a variety of art by Japanese artists including modern paintings, art nouveau glasswork, and a collection of Takehisa Yumeji artwork. The museum also offers visitors a hot spring foot bath and a cafe with views out over the surrounding mountains.

The Hara Museum ARC displays a rotating exhibition of contemporary art by both Japanese and foreign artists. Most of the artwork is displayed in the museum's indoor exhibition spaces, although artwork may be found outside around the museum grounds as well.