This friendly onsen hotel boasts some excellent facilities including mountain-view rooms and coin laundry. The lovely rotemburo (¥520) is open to the public from 11.30am to 8pm, and there's a family-style bath deep in the forest (¥1030 per hour). The location, near Ebino-Kōgen village, is superb and the restaurant makes tasty meals. Rates may be lower depending on the meal calibre, so ask when you reserve.
There's a shuttle bus to JR Kirishima-Jingū and JR Kobayashi Stations; ring ahead to get one.