The open-air bath in your room has an electric opening and closing system, and the roof and front wall can also be opened and closed electrically.
If you are concerned about the conditions outside, you can adjust the front wall to your preferred height. On rainy days you can close just the roof and enjoy the view, and of course at night you can open it fully to enjoy the starry sky.
The latest evolution of the open-air bath in your guest room, enjoy your hot spring time without worrying about the weather.