Why cotton mattress is used as bedding in japan?

- Futons are traditionally used in Japan as bedding. They are typically made of cotton, and are often used with a tatami mat.

- Futons are comfortable and supportive, and conform to the body's contours. They are also relatively easy to move around and store, making them ideal for small apartments or homes.

- Futons are inexpensive and come in a variety of sizes and styles, making them a popular choice for bedding in Japan and other countries.

- In addition to being used for sleeping, futons can also be used for sitting or lounging during the day. They are often placed on the floor or on a raised platform, and can be paired with pillows, blankets, and other accessories to create a comfortable seating area.