All that said, in reality, these warm bath facilities are very popular across the country, and there are some relatively small onsen-ryokan with ten to twenty rooms that are so popular that you will have a hard time to make reservations.
もちろん、各地の温浴施設の繁盛、部屋数10～20と決して大規模ではないが人気で予約をとりにくい温泉旅館もある。