Tatami is a floor mat in a traditional Japanese-style room. Tatami is made of grass. Japanese rental houses are indicated by the number of tatami mats. The size of a room in a generaly housing complex is 4.5 or 6 tatami mats. Of course, there are many exceptions. pic.twitter.com/yIjZcNJuMo

— 千葉 贋作 🐾 (@ChibaGunsaku) May 23, 2020