What is a Futon Mattress | What Size is a Futon Mattress
Amazon.co.jp: SEMI-TU UNO FK Monotone Stylish Modern Design Kotatsu Comforter and Futon Set 29.5 x 29.5 inches (75 x 75 cm) : Home & Kitchen
Futon Sofa Bed | Futon Couch Bed | The Futon Shop
Amazon.co.jp: Japanese Futon Mattress Floor Mattress, Soft Tatami Mat, Roll Up Bed Mat, Foldable Minimalist Mattress for Student Dorm (Color: Pink, Size: 90x200cm(35x79inch)) : Home & Kitchen