Fluffy Japanese rush rug 191 x 191 30 types to choose from Natural air conditioner, rush grass Smooth texture for everyday comfort All of the rush grass used is from Kumamoto Prefecture, a famous rush-growing region. It is made by skilled craftsmen in factories across Japan. The rush grass grown in clean water and fertile soil is not only smooth and shiny, but also has a firm texture and excellent durability, allowing you to use it for a long time.