A futon (布団) is the Japanese traditional style of bedding.

A complete futon set consists of both a mattress (敷き布団, shikibuton, lit. "spreading futon") and a duvet (掛け布団, kakebuton, lit. "covering futon")^[1]. Both elements of a futon bedding set are pliable enough to be aired, folded and stored away in a large closet (oshiire) during the day allowing the room to serve for purposes other than as a bedroom^[2]. Traditionally, futon are used on tatami, a type of mat used as a flooring material which also provides a softer base for the futon than most harder flooring types, such as wood or stone. Futons must be folded away daily and aired in the sun regularly to prevent mold from developing and also to keep the futon free of mites (dani). All over Japan, futon can commonly be seen hanging over balconies airing in the sun^[3]. A futon dryer is also available for those unable to hang out their futon.

Western-style futons, which typically resemble low, wooden sofa beds, differ substantially from their Japanese counterparts^[4][5]. They often have the dimensions of a western mattress, and are too thick to fold 180°. They are often set up and stored on a slatted frame, which avoids having to move them to air them, especially in the dry indoor air of a centrally-heated house (Japanese homes were not traditionally centrally-heated^[6]).

See also

• Day bed (bed used for other purposes during the day)
• Futon dryer (forced-air portable dryer for airing futons indoors)
• Ken (unit on which houses are traditionally built)
• Sofa bed (converts)
• Tatami (the flooring mats upon which futons are traditionally spread)
• Washitsu (the type of rooms in which futons are frequently used)
• Zabuton (sitting futon, a smaller cushion)