Kaiyoukaku features outdoor and indoor hot-spring baths, a roof terrace and Japanese rooms with sea views. It also offers concierge services, free WiFi at the lobby and rental bicycles, while entertainment facilities also include a sauna, a bar and karaoke. Massages treatments are available. Kaiyoukaku has a 24-hour reception, and it offers a free shuttle service to/from Mikawa Mitani Train Station. Guests can repose at a public hot-spring bath separate by gender, or browse the souvenir shop. Drinks vending machines and free parking are on site. Spacious rooms feature a tatami (woven-straw) floor and a low table with seating cushions. They are fitted with a TV, a fridge and a private bathroom. Yukata robes and toiletries are provided. Guests sleep in traditional futon bedding. The Kaiyoukaku is only a 3-minute drive from amusement park Laguna Gamagori. Mikawa Mitani Station is a 5-minute drive away. A Japanese breakfast and dinner are served at the dining room. Room service is also available.