Hotel Sonia Otaru features free WiFi in public areas, coffee in a common area, and microwave in a common area. Self parking is offered for JPY 1200 per night. Front-desk staff can answer questions 24/7, and assist with securing valuables, luggage storage, and dry cleaning/laundry. Other amenities at this hot springs hotel include laundry facilities, a vending machine, and a water dispenser.