This prefab floating house in Amsterdam was inspired by Japanese tatami rooms
Cotton Shikibuton Japanese Futon – East West Futons
MustMat Japanese Traditional Tatami Mat/Futon Mattress Firm and Comfortable 35.4"x78.7"x1.2" Green/Natural Rush Grass/Folds Easily Great for Bed/Meditation Space/Yoga/Zen Room/Japanese Tearo | Walmart Canada