It’s important not to leave futon on the floor in the same style as it was at sleeping time. Please fold or roll up your futon when you’re not using it.
In Japan, people often put their futons in a oshiire – closet in a tatami room to make the most of the space in the room or hide it from the guests. If you don’t have a closet, you don’t have to put your futon in it. Depending on your living environment, it may be better to put your futon outside the closet to release the humidity in the futon.
For long time storage, we have a futon bag.