A low-profile wooden slatted frame. Used instead of tatami for better airflow.
Popular, accessible brands for Japanese-made starters. Muji: Perfect for minimalist frames and simple bedding. buy japanese bed
Hang it in the sun weekly. This kills bacteria and fluffs the cotton. A low-profile wooden slatted frame
I can then recommend a specific that fits your home. buy japanese bed
Japanese beds require more "work" than a standard mattress to prevent mold and compression. Don't leave it on the floor all day.