1) Zen Buddhist terminology 
A Zabuton (座布団) is a Japanese cushion for sitting. The zabuton is generally used when sitting on the floor and may also be used when sitting on a chair. In a more casual setting, the zabuton can be used in conjunction with a 座椅子, a type of Japanese legless chair, with or without an accompanying 脇息, a Japanese-style armrest. Ordinar...
flat Japanese cushion for kneeling or sitting
large pillow used for zazen
A Japanese cushion for sitting on in seiza (kneeling position)
a large, flat cushion, used in Japan for sitting or kneeling on the floor.