The QR code provided by Minpaku-in didn't work, there was another email with a different key code. We had the same problem with another group of Korean families, and since the hotel had no front desk staff, we solved the problem through mutual help.
Other than that, the accommodations were very comfortable for our trip and there was enough space for a family trip of 5-6 people.
It is nice, clean, spacious with awesome view. We did not have a car but it is only a five minute walk from Hanazaki Marche Mae. Best hotel in our trip.